WIHART2/WISA2 Wireless Module – Hardware Integration Manual

Document Version: 1.3

Centero

Hardware Part Number: CW-24-200

Image: A close-up image of the Centero CW-24-200 wireless module, showing its compact size and various markings including MAC address, FCC ID, and IC certification numbers.

Introduction

This integration manual provides comprehensive specifications and details for engineers to integrate the WIHART2/WISA2 module into new or existing products. The WIHART2/WISA2 wireless module is a direct replacement for Centero's first-generation WIHART/WISA wireless module. The hardware model and part number is CW-24-200.

The document covers:

Functional specifications
Electrical characteristics
Pinout and connectivity interfaces
Mechanical drawings
Wireless module integration instructions for FCC and ISED compliance
RF specifications

It also provides specifications for connecting the module to an external application processor running ISA100 application layer firmware or HART/WirelessHART application layer firmware.

The WIHART module is pre-loaded with a WirelessHART compliant stack, and the WISA module is pre-loaded with an ISA100 Wireless compliant stack. A dual-boot mode is available, allowing the module to boot into either ISA100 or WirelessHART based on a digital input state.

Audience

This manual is intended for hardware and integration engineers.

Revision History

Rev.	Date	Description
1.0	October 4, 2016	Initial baseline document.
1.1	December 14, 2017	Updated to include functional details related to connectivity.
1.2	March 9, 2017	Revised pin definitions. Added PCB stack-up, drawings and block diagram.
1.3	June 30, 2017	Revised section 5 – connectivity to external application processor.
1.4	July 11, 2017	Added mechanical drawings.
1.8	April 22, 2018	Added Manufacturing Information section.
1.81	May 18, 2018	Added RoHS compliance statement.
1.83	August 24, 2018	Changed max voltage of any digital I/O to 3.3 V.
1.85	March 2, 2019	Minor revisions.
1.90	October 16, 2019	Cosmetic revisions to the WiHART module connectivity – no impact on functionality.
1.91	January 8, 2020	Extended the supply voltage range to 2.9 V based on additional measurement.
1.92	February 27, 2020	Revised V_LDO_OUT parameter to reflect extended voltage range.
2.0	February 26, 2021	Added reference design schematics for WISA, WIHART and Dual-Boot modules.
1.0	July 14, 2024	Reset revision number and revised entire document for the second generation WIHART2 and WISA2 drop in replacement module.
1.1	January 8, 2025	Editorial revision of some of the JTAG pin names.
1.2	February 28, 2025	Revised pictures to show correct FCC and IC ID numbers.
1.3	June 12, 2025	Revised to comply with FCC/ISED documentation requirements.

Definitions, Acronyms, and Abbreviations

The following list defines the acronyms and abbreviations used in this document:

ADC: Analog to Digital Converter
AES: Advanced Encryption Standard
CTS: Clear to Send
DAC: Digital to Analog Converter
DMA: Direct Memory Access
FEM: Front End Module
I2C: Inter-Integrated Circuit is a multi-master serial computer bus
ISM: Industrial Scientific Medical 2.4 GHz radio frequency band
JTAG: Joint Test Action Group
LDO: Low Drop Regulator
LGA: Land Grid Array
MAC: Media Access Controller
MCU: Microcontroller Unit
MEMS: Micro Electro Mechanical Systems
MMCX: Micro Miniature Coaxial
NEXUS: An embedded processor development tool interface that helps design engineers identify software and hardware-level issues.
PA: Power Amplifier
PCB: Printed circuit board
SiP: Platform in Package
PWM: Pulse-width modulation
RTC: Real Time Clock
RTS: Request to Send
SPI: Serial Peripheral Interface
SSI: Synchronous Serial Interface
USB: Universal Serial Bus
VCP: Virtual Com Port

Description and Functional Specifications

General Features

The WIHART2/WISA2 wireless module is based on the Silicon Labs EFR32MG24 chipset, an IEEE 802.15.4 platform. It integrates a low-power 2.4 GHz radio frequency transceiver, operating within the 2400-2483.5 MHz band with +16dBm output power. The module supports industrial wireless applications compliant with ISA100.11a and WirelessHART standards. Its System on Chip (SoC) architecture combines a radio and microcontroller for a cost-effective, compact solution.

Multi-protocol support for 802.15.4 based ISA100/WirelessHART and Bluetooth Low Energy (BLE).
Drop-in replacement for Centero's first-generation WIHART/WISA wireless module.
The CW-24-200 is offered in three models: WISA2 (ISA100 Wireless), WIHART2 (WirelessHART), and Dual-boot (ISA100/WirelessHART).
Based on Silicon Labs' EFR32MG24 chipset, featuring a 2.4 GHz SoC, 32-bit ARM core MCU, and hardware acceleration for IEEE 802.15.4 MAC and AES security.
State-of-the-art security with Silicon Labs' Secure Vault™, PSA Level 3 certification.
On-chip over-the-air (OTA) secure upgrades.
Market-leading sensitivity of -104 dBm with a maximum link budget of 120 dB (ISA100), 114 dB (WirelessHART), and 113 dB (Bluetooth Low Energy).
Designed for integration in intrinsically safe (Exi) compliant or certified devices.
Wireless features: Single-ended output RF port, -105 dBm sensitivity at MMCX port, programmable output power (-5 dBm to +16 dBm), hardware-based dynamic control of external RF elements, external antenna connectivity via MMCX or PCB antennas, and Faraday shield for regulatory compliance.
Ready for automated assembly in JEDEC compliant trays.
On-board regulator provides power for external circuitry, reducing product cost and size.
System clock options support ISA100 and WirelessHART time synchronization requirements.

Form Factor and Markings

The WIHART2/WISA2 module is a surface-mountable, castellated PCB form factor. The user interface exposes serial interfaces, MCU digital/analog I/Os, and power. Firmware development and debugging are supported via the JTAG SWD port.

Figure 1: WIHART2/WISA2 Module Form Factor - A diagram illustrating the physical dimensions and pin layout of the module.

Figure 2: WIHART2/WISA2 Module Markings - Shows the markings on the module, including the hardware part number (CW-24-200), MAC address, FCC and IC IDs, and firmware loaded information (ISA100, WirelessHART, Thread, Dual-boot).

Specifications and Performance Parameters

Electrical Specifications

Parameter	MIN	TYPICAL	MAX	Units	Notes/Conditions
Supply Voltage (VCC)	2.9 V	3.3 V	4.2 V	V	Max 6V for 10 seconds
Supply Voltage Noise	0	0	200	mVPP	50Hz-15MHz
Regulated Voltage Output	VCC-200 mV (non-reg if VCC <3.2 V)	3.00	3.02	V	Supplied to external circuitry via pin V_LDO_OUT (PIN 29). If VCC > 3.2 V, output is 3.0 V. If VCC < 3.2 V, output is VCC-200 mV non-regulated.
Regulated Voltage Output Noise	30	35	40	mVPP	Supplied to external circuitry via pin V_LDO_OUT (PIN 29)
LDO Output Max Current	0	0	25	mA	Maximum current supplied by V_LDO_OUT (PIN 29)
Voltage on any digital I/O	0	3.0	3.3	V	CMOS compatible
Voltage on any analog I/O	0	3.0	VREF	V	Internal VREF is 3.0 V
Idle mode current	3.0	4.5	6	mA	At 25° C
Transmit Current - 802.15.4 and BLE at 0 dBm	22	23	27	mA	At 25° C
Transmit Current - 802.15.4 and BLE at 10 dBm	56	59	61	mA	At 25° C
Transmit Current - 802.15.4 and BLE at 16 dBm	116	119	124	mA	At 25° C
Receive Current 802.15.4	11	11.5	12	mA	At 25° C
Receive Current BLE - 1 MBPS PHY	7	7.5	8	mA	At 25° C
Receive Current BLE – 2 MBPS PHY	8	8.5	9	mA	At 25° C
Sleep Current	1.8	2	5	μΑ	At 25° C

RF Specifications

Parameter	MIN	TYPICAL	MAX	Units	Notes/Conditions
802.15.4 Frequency range	2400	N/A	2475	MHz	<5% PER for 20-byte packets (using +2 dBi antenna isotropic antenna)
Range (outdoor line-of-sight)		0.75 miles (1200 meters)		Miles/Meters	<5% PER for 20-byte packets (using +2 dBi antenna isotropic antenna)
Range (indoor/industrial/urban)		1000 ft (300 m)		Feet/Meters	5% PER for 20-byte packets (using +2 dBi antenna isotropic antenna)
Number of Frequency Channels		15			IEEE 802.15.4 frequency channels. Channel 26 is not used due to FCC regulatory.
Occupied Channel BW		2.65 MHz			Per IEEE 802.15.4 standard specification.
Channel Separation		5 MHz			Per IEEE 802.15.4 standard specification.
Modulation		Q-PSK			Per IEEE 802.15.4 standard specification.
Raw Data Rate		250 kbps			Per IEEE 802.15.4 standard specification.
Frequency Accuracy	-10	Frequency	+10	ppm	±4 ppm at +25 °C
RF Transmitter
RF Output Power	-5	0	+16	dBm	Programmable. Note: When transmitting on channel 26, output power should not exceed -4 dBm to meet FCC Part 15.
RF Receiver
RF Sensitivity – 802.15.4	-103	-104	-105	dBm	<1% PER for 20-byte packets per 802.15.4-2003 standards specification.
Bluetooth Low Energy - 1 Mbps GFSK	-96	-97	-98	dBm	<1% PER for 20-byte packets per 802.15.4-2003 standards specification.
Bluetooth Low Energy - 2 Mbps GFSK	-93	-94	-94	dBm	<1% PER for 20-byte packets per 802.15.4-2003 standards specification.

Antenna Port

Parameter	MIN	TYPICAL	MAX	Units	Notes/Conditions
Connector - antenna port		MMCX
Impedance		50	Ω

Mechanical and Board Specifications

Parameter	MIN	Units	Notes/Conditions
Size - Module with Shield Mounted	0.8" x 1" x 0.2"	inches	20.5 x 25.5 x 5.25 mm
Form Factor	Surface Mount
Layer build (PCB) width	1.6	mm	1.57mm option 4-Layer board
Dielectric material (PCB)	FR4		FR4

Environmental Specifications

Parameter	MIN	TYP	MAX	Units	Notes/Conditions
Operating temperature (see note)	-40	+25	+85	°C
Storage temperature	-40	+25	+85	°C
Operating Relative Humidity	10		90	%	Non-condensing humidity

User Interfaces

UART Ports: Two (2) for data interface with WirelessHART communication stack.
SPI Ports: See table detailing WISA2/WIHART2 module pin definition.
I2C port: One (1) - Need external pull-up resistors. See table detailing WISA2/WIHART2 module pin definition.
JTAG debug port: One (1) - See table detailing WISA2/WIHART2 module pin definition.
GPIOS: 5 (dedicated)
ADC Inputs: 3 inputs - One dedicated ADC input. Two inputs can also be used as GPIOs. Two additional pins provided for connectivity to external voltage reference.

Regulatory Compliance

Compliance Type	Status	Notes
EMI/RF Compliance – USA	Certified	FCC Section 15, Part 247 – modular certification – see antenna list
EMI/RF Compliance – Canada	Certified	IC RSS 210 - modular certification. Canada: IC RSS-247/RSS-GEN – modular certification (see antenna list)
EMI/RF – EU/UKCA	Certified	CE-Approval –R&TTE Directive. Modular certification see antenna list. Compliant to RED & EMCD 2014/53/EU, 2014/30/EU. EN 300-328 V2.2.2 (includes receiver blocking and intentional spurious emissions).
RoHS	Compliant	Directive 2015/863 commonly referred to as RoHS 3.
HAZLOC and Intrinsic Safety	Compliant	Designed to pass intrinsic safety compliance tests. This includes design considerations: Minimizing overall lump capacitance, Minimizing overall lump inductance, Minimizing the passive component energy storage capacity of the WISA2/WIHART2 module in order to prevent sparking.

Interface and Pinout

User Interface

The user interface is exposed through a standard castellated 1.27 mm pitch PCB pinout.

Figure 3: Interface Locations and Pinout - Diagrams showing the top and side views of the module, indicating pin locations and dimensions.

The interface provides access to selected micro-controller GPIOs and serial interface ports. Power is also provided through this interface.

Figure 4: WIHART2/WISA2 Module - Interface and Pinout - A detailed diagram showing the pinout of the WIHART2/WISA2 module with pin numbers and corresponding signals.

WIHART2/WISA2 Module- Pin Definition and Functionality

No.	Name	Description	Type	Direction	Functionality
1	RF-GND	Ground	Power	NAPP	Ground to be used for RF IO signal.
2	RF-IO	RF Signal	RF	I/O	RF port signal routed to an external board when C26 is populated and C22 is not populated. For PCB antennas or external matching circuitry.
3	RF-GND	Ground	Power	NAPP	Ground to be used for RF IO signal.
4	SPI-CS	SPI Chip Select	DIG	OUT	Standard SPI communication chip select signal.
5	SPI-SCK	SPI Clock	DIG	OUT	Standard SPI communication clock signal.
6	SPI-SOUT	SPI Data Out	DIG	OUT	Standard SPI communication data out signal (MOSI – Master Output Slave Input).
7	SPI-SIN	SPI Data In	DIG	IN	Standard SPI communication data in signal (MISO – Master Input Slave Output).
8	GPIO5	General Purpose I/O	DIG	I/O	General purpose digital I/O.
9	I2C-SCL	I2C Clock	DIG	OUT	I2C clock output – pull-up resistors need to be provided externally.
10	I2C-SDA	I2C Serial Data Line	DIG	I/O	I2C serial data – pull-up resistors need to be provided externally.
11	VCC-IN	Supply Voltage	POWER	NAPP	Supply voltage – provide external 3.3 VDC.
12	WKU-RADIO	Wake-up signal for external application processor	DIG	IN	Digital line used by the application processor to wake up WIHART2/WISA2 module from sleep mode. Signal is active high and notifies the module that the application processor intends to communicate. When active, the module will not enter low-power sleep mode.
13	RDY-RADIO	Ready signal for external application processor	DIG	OUT	Digital line used by WIHART2/WISA2 module to wake up the external application processor. Connect to external application processor GPIO.
14	UARTO-RX	UARTO Receive Data	DIG	IN	UART used for bootloader, wired firmware upgrades, and serial debug interface (when module is running Hardware Test Firmware).
15	UARTO-TX	UARTO Transmit Data	DIG	OUT	UART used for bootloader, wired firmware upgrades, and serial debug interface (when module is running Hardware Test Firmware).
16	UART1-TX/API	UART1 Transmit Data	DIG	OUT	UART TX signal used for communication with the external application processor. Connect to RX signal of the application processor UART.
17	UART1-RX/API	UART1 Receive Data	DIG	IN	UART RX signal used for communication with the external application processor. Connect to TX signal of the application processor UART.
18	EXTRTS	UART1 Clear to Send	DIG	IN	UART CTS signal used for communication with external application processor. Connect to RTS (OUTPUT) signal of the application processor UART.
19	EXTCTS	UART1 Request to Send	DIG	OUT	UART RTS signal used for communication with external application processor. Connect to CTS (INPUT) signal of the application processor UART.
20	WISA STATUS/GPIO2	General Purpose I/O	DIG	I/O	ISA100 Wireless wakeup/status/provisioning signal, typically connected to a push-button. Holding this signal low for > 30 seconds will cause the WISA module ISA100 stack to erase its provisioning information to the factory default state and unjoin the ISA100 network. No WiHART functionality associated to this pin.
21	ADC-BATT	Analog Input for Battery	ANALOG	IN	Analog input used to read battery voltage level.
22	GPIO/ADC1	General Purpose I/O	DIG	I/O	General purpose digital I/O. Alternate functionality: Analog input to ADC.
23	GPIO/ADC2	General Purpose I/O	DIG	I/O	General purpose digital I/O. Alternate functionality: Analog input to ADC.
24	GPIO1	General Purpose I/O	DIG	I/O	General purpose digital I/O.
25	VREFH	ADC Voltage Reference	POWER	IN	External high voltage reference for the ADC. Connect to external 3.0 VDC reference. If not connected to an external 3.0 VDC reference, connect to WIHART2/WISA2 pin 29, V-LDO-OUT.
26	TAMPER/RTC-WAKEUP	Tamper detect.	DIG	IN	Tamper detect digital line. Alternate functionality: Real-time clock wake-up.
27	GND	Ground	POWER	NAPP	Ground.
28	VREFL	ADC Voltage Reference	POWER	NAPP	Voltage reference for the ADC. Connect to GND.
29	V-LDO-OUT	Power output.	POWER	NAPP	Voltage output of the internal LDO at 3.0 VDC – can be used to power external sensing/control circuitry. Limit current draw on this pin to <25 mA.
30	JTAG-TCLK/SWD-CLK	JTAG	DIG	I/O	JTAG clock signal – SWD-CLK.
31	JTAG-TDI	JTAG	DIG	I/O	JTAG TDI signal.
32	GPIO5/NMI OR BOOT-SWITCH	General Purpose I/O or BOOT-SWITCH	DIG	I/O	BOOT-SWITCH signal read by the bootloader at start-up. The status of this pin dictates the firmware image that will be loaded (HIGH -> ISA100, LOW ->WirelessHART). General purpose digital I/O with non-masking interrupt.
33	JTAG-TDO/TRACE-SWO	JTAG	DIG	I/O	JTAG SWO signal. Traditional serial JTAG Trace signal.
34	JTAG-TMS/SWD-DIO	JTAG	DIG	I/O	Serial JTAG SWD-DIO signal. JTAG TMS signal.
35	GPIO3/CLK-OUT	General Purpose I/O	DIG	I/O	General purpose digital I/O.
36	GPIO4	General Purpose I/O	DIG	I/O	General purpose digital I/O.
37	nReset	Reset	DIG	IN	Reset signal of the KW21 chipset.
38	GND	Ground	POWER	NAPP	Ground.

Reference Design Schematics

WISA2 Reference Design Schematic

Figure: Shows the schematic for a reference hardware integration of the WISA2 (ISA100 Wireless) module.

WiHART2 Reference Design Schematic

Figure: Shows the schematic for a reference hardware integration of the WiHART2 (WirelessHART) module.

Dual-Boot WISA2 – WiHART2 Reference Design Schematic

Figure: Shows the schematic for a reference hardware integration of the Dual-Boot ISA100 Wireless (WISA2) and WirelessHART (WiHART2) module.

ISA100/WirelessHART™ Communication Stack - External Application Processor Interface

NOTE: For additional information on the external application processor interface (pins, timing, sequence), consult the API Integration document.

The WIHART2/WISA2 wireless module communicates with external application processors via a serial UART interface. The figure below depicts the minimal recommended connectivity between the WIHART2/WISA2 wireless module and an external application processor, including flow control signals for reliable UART serial connection.

Most WirelessHART and ISA100 Wireless compliant field instruments spend most of their time in deep sleep mode to conserve battery power. The interface includes wake-up signals to allow entities to wake each other during sleep mode.

Figure 5: Connectivity for UART Communication between WIHART2/WISA2 Module and External Application Processor - A block diagram illustrating the UART communication interface between the module and an external processor, showing pin mappings.

Antenna List

The WIHART2/WISA2 wireless module (hardware part number CW-24-200) has obtained wireless modular certifications and can be used with the following antennas:

Antenna	Description - Type	Manufacturer	Model	Gain
1	Direct mount, 2 dBi, omni-directional whip antenna, SMA male connector.	Nearson	S181AH-2450S	2.0 dBi
2	Remote mount, 4 dBi, omni-directional antenna for ATEX Zone 1 and 2 area classifications, SMA-male connector, with L-mount bracket for wall or pipe installations.	Comrod/Mimes	UHF2458G	4 dBi
3	Remote mount, 8 dBi, omni-directional antenna for, N-male connector, with L-mount bracket for wall or pipe installations.	Data Alliance	A208Nm-MTL16N	8 dBi

Trace Antennas: The CW-24-200 modular transmitter and device is not designed to be used with trace antennas.

RF Exposure: This equipment complies with FCC Radiation Exposure limits and should be installed and operated with a minimum distance of 20 cm between the radiator and any part of the human body. The host product manufacturer must provide RF Exposure information to end users.

Wireless Compliance - Canada

Labelling: Host integrators must place a label showing “Contains IC: 23069-CW24200” on the host device.

IC RSS Compliance: The CW-24-200 complies with IC RSS rules RSS-247 for DTSs, FHSS, and LE-LAN Devices. Operation is subject to two conditions: (1) no harmful interference, and (2) acceptance of any received interference.

Note 1: The CW-24-200 is authorized for RSS-247 rules. Host product manufacturer requires Part 15 Subpart B compliance testing.

Additional Testing: Contact Centero for information on enabling “Hardware Test Firmware” and RF test modes.

Note 2: Limited modular procedures are not applicable.

Warning: Changes or modifications not approved by the responsible party void the user's authority to operate the product.

French Compliance Statement: Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation est autorisée aux deux conditions suivantes : (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.

Antenna Approval: This radio transmitter has been approved by Industry Canada to operate with the antenna types listed below with maximum permissible gain and required antenna impedance. Antenna types not included, or with gain greater than the maximum indicated, are prohibited.

French Antenna Approval: Le présent émetteur radio, IC: 23069-CW24200 a été approuvé par Industrie Canada pour fonctionner avec les types d'antenne énumérés ci-dessous et ayant un gain admissible maximal et l'impédance requise pour chaque type d'antenne. Les types d'antenne non inclus dans cette liste, ou dont le gain est supérieur au gain maximal indiqué, sont strictement interdits pour l'exploitation de l'émetteur.

RF Exposure (Canada): Cet équipement est conforme aux limites d'exposition aux radiations ICES définies pour un environnement non contrôlé. Cet équipement doit être installé et utilisé à une distance minimale de 20 cm entre le radiateur et une partie de votre corps. L'émetteur modulaire CW-24-200 ne peut être utilisé dans un hôte que dans les conditions pour lesquelles il a été autorisé. Le fabricant du produit hôte est tenu de fournir les informations sur l'exposition aux RF aux utilisateurs finaux dans leurs manuels de produits finaux. Toute utilisation autre que celles autorisées, par exemple dans un appareil mobile ou portable, ou avec un autre émetteur fonctionnant simultanément, nécessite une évaluation, des tests supplémentaires ou une modification de l'autorisation de classe 2.

RoHS Compliance

This equipment is manufactured in compliance with the European Union RoHS (Restriction on Use of Hazardous Substance in Electronic Equipment) directives:

2002/95/EU - commonly referred to as RoHS
Revision 2011/65/EU - commonly referred to as RoHS 2
Revision 2015/863 - commonly referred to as RoHS 3

Detailed Mechanical Specifications

Mechanical Drawings

NOTE: For additional, more detailed information, please consult the WISA2/WIHART2 Hardware Engineering Package. The WISA2/WIHART2 Hardware Engineering includes schematic symbols, footprints, and mechanical drawings.

Figure 6: WIHART2/WISA2 Module Installation Outline Drawing - A detailed mechanical drawing of the module, showing dimensions, pin locations, and mounting details.

Recommended PCB Footprint Specifications

Figure 7: WIHART2/WISA2 Module Recommended Footprint - A diagram showing the recommended PCB footprint for the module, including component keepout areas and via tenting recommendations.

Manufacturing Information

The WIHART2/WISA2 wireless module is designed for surface-mount on OEM PCBs with castellated pads for easy soldering and inspection.

Moisture Proofing

The WIHART2/WISA2 wireless module has a Moisture Sensitivity Level (MSL) of 3. Refer to IPC/JEDEC J-STD-020 and JEDEC J-STD-033A for additional handling instructions.

Packaging information for baking	Yes
Baking Temperature	100° - 125° C
Baking Humidity	Ambient
Minimum/Maximum Baking Duration	4 – 24 hours
Number of Times for Baking	2 Max
Moisture Proofing condition remarks	Re-seal in original packaging

Recommended Solder Cycle and Instructions

The following table lists the recommended solder reflow cycle and temperature settings:

Time (seconds)	Temperature (°C)
30	65
60	100
90	135
120	160
150	195
180	240
210	260

Additional recommended soldering instructions:

Ability/Inability for flow soldering: Yes
Flow soldering temperature: 500 to 510 degrees F
Flow soldering time: 3 to 7 seconds dwell in solder
Capable number of re-flow soldering: 2
Re-flow soldering peak temperature: 260 degrees C
Re-flow soldering time: 5 to 15 seconds at maximum temperature
Manual Soldering possible/not possible: Yes
Manual soldering temperature: 600 to 750 degrees F tip temperature
Manual soldering time: 3 to 10 seconds
Lead-free soldering (Sn-3Ag-0.5Cu) possible/not possible: Yes
Eutectic lead soldering (Sn-Pb) possible/ not possible: Yes
Plated or ball composition of outmost external layer: ENIG
Soldering Condition Remarks: Soldering time and temperatures based on thermal mass.

Flux and Cleaning Instructions

Centero recommends using a “no clean” solder paste to eliminate the cleaning step and prevent residual flux under the device.

Caution: Cleaning can result in residual liquid under the device, potentially causing shorting between pads. Residual moisture and flux are not easily seen during inspection.

Type of Cleaner	Kyzen 4241 aqueous chemistry
Ability of ultrasonic cleaning	No
Ability of nozzle type cleaning	Yes, Aqueous Tech Batch Cleaner
Cleaning Temperature	150 degrees F
Cleaning Time	20 minutes
Cleaning Condition Remarks	Removes flux residue, light oils and dirt

Rework Instructions

CAUTION! Any modifications to the wireless module void the warranty coverage and certifications.

Rework on the module itself should not be performed. However, for guidance on maximizing rework success, the following information is provided. The wireless module may be removed using a hot air rework station or hot plate. Care should be taken not to overheat the module, as this could dislodge internal components.