Samba™ PLC+HMI User Guide

General Description

The controllers covered in this guide are micro-PLC+HMI, rugged programmable logic controllers with built-in operating panels and on-board I/Os.

Standard Kit Contents

Alert Symbols and General Restrictions

When any of the following symbols appear, read the associated information carefully.

Before using this product, the user must read and understand this document.

• All examples and diagrams are intended to aid understanding, and do not guarantee operation. Unitronics accepts no responsibility for actual use of this product based on these examples.
• Please dispose of this product according to local and national standards and regulations.
• Only qualified service personnel should open this device or carry out repairs.

Failure to comply with appropriate safety guidelines can cause severe injury or property damage:

• Do not attempt to use this device with parameters that exceed permissible levels.
• To avoid damaging the system, do not connect/disconnect the device when power is on.

Environmental Considerations

Do not install in areas with:

• Excessive or conductive dust, corrosive or flammable gas, moisture or rain, excessive heat, regular impact shocks or excessive vibration, in accordance with the standards given in the product's technical specification sheet.
• Do not place in water or let water leak onto the unit.
• Do not allow debris to fall inside the unit during installation.

• Ventilation: 10mm space required between controller's top/bottom edges & enclosure walls.
• Install at maximum distance from high-voltage cables and power equipment.

UL Compliance

The following section is relevant to Unitronics' products that are listed with the UL.

UL Listed for Hazardous Locations (Class I, Division 2, Groups A, B, C and D)

The following models are UL listed for Hazardous Locations:

• V130-33-R34, V130-J-R34, V130-T4-ZK1, V350-35-RA22, V350-J-RA22, V350-35-R34, V350-J-R34, V430-J-R34, SM35-J-T20, SM43-J-T20

UL Listed for Ordinary Location

The following models are UL listed for Ordinary Location:

• V130-33-B1, V130-J-B1, V130-33-TA24, V130-J-TA24, V130-33-T38, V130-J-T38
• V130-33-TR20, V130-J-TR20, V130-33-TR34, V130-J-TR34, V130-33-RA22, V130-J-RA22, V130-33-TRA22, V130-J-TRA22, V130-33-T2, V130-J-T2, V130-33-TR6, V130-J-TR6, V130-33-R34, V350-35-B1, V130-T4-ZK1, V350-J-B1, V350-35-TA24, V350-J-TA24, V350-35-T38, V350-J-T38, V350-35-TR20, V350-J-TR20, V350-35-TR34, V350-J-TR34, V350-35-TRA22, V350-J-TRA22, V350-35-T2, V350-J-T2, V350-35-TR6, V350-J-TR6, V350-S-TA24, V350-JS-TA24, V350-35-RA22, V350-J-RA22, V350-35-R34, V430-J-B1, V430-J-TA24, V430-J-T38, V430-J-R34, V430-J-RH2, V430-J-TR34, V430-J-RA22, V430-J-TRA22, V430-J-T2, V430-J-RH6, SM35-J-D4, SM35-J-R20, SM35-J-RA22, SM35-J-TA22, SM43-J-R20, SM43-J-RA22, SM43-J-TA22, SM35-J-T20, SM43-J-T20, SM70-J-R20, SM70-J-RA22, SM70-J-T20, SM70-J-T38, SM70-J-TA22, SM70-J-TRA22

For models from series V130, V130-J, V430, that include “T4” or “J4” in the Model name, they are suitable for mounting on the flat surface of a Type 4X enclosure (e.g., V130-T4-R34, V130-J4-R34, V430-J4-T2, SM43-J4-R20).

UL Ordinary Location Requirements

To meet the UL ordinary location standard, panel-mount the device on the flat surface of Type 1 or Type 4X enclosures.

UL Ratings, Programmable Controllers for Use in Hazardous Locations, Class I, Division 2, Groups A, B, C and D

This section relates to all Unitronics products bearing the UL symbols, indicating approval for use in hazardous locations (Class I, Division 2, Groups A, B, C and D).

• ! Caution: This equipment is suitable for use in Class I, Division 2, Groups A, B, C and D, or Non-hazardous locations only.
• Input and output wiring must comply with Class I, Division 2 wiring methods and the authority having jurisdiction.
• ! WARNING—Explosion Hazard: Substitution of components may impair suitability for Class I, Division 2.
• ! WARNING—EXPLOSION HAZARD: Do not connect or disconnect equipment unless power has been switched off or the area is known to be non-hazardous.
• ! WARNING: Exposure to some chemicals may degrade the sealing properties of material used in Relays.
• This equipment must be installed using wiring methods as required for Class I, Division 2 as per the NEC and/or CEC.

French Sections (Translated)

UL des zones ordinaires (UL Ordinary Locations)

Pour respecter la norme UL des zones ordinaires, monter l'appareil sur une surface plane de type de protection 1 ou 4X.

To comply with the UL standard for ordinary locations, mount the device on a flat surface of a Type 1 or Type 4X enclosure.

Certification UL des automates programmables, pour une utilisation en environnement à risques, Class I, Division 2, Groups A, B, C et D (UL Certification for Programmable Controllers for Use in Hazardous Environments, Class I, Division 2, Groups A, B, C and D)

Cette note fait référence à tous les produits Unitronics portant le symbole UL - produits qui ont été certifiés pour une utilisation dans des endroits dangereux, Classe I, Division 2, Groupes A, B, C et D.

This note refers to all Unitronics products bearing the UL symbol – products certified for use in hazardous locations, Class I, Division 2, Groups A, B, C and D.

• ! Attention: Cet équipement est adapté pour une utilisation en Classe I, Division 2, Groupes A, B, C et D, ou dans Non-dangereux endroits seulement.
• The input/output wiring must be in accordance with Class I, Division 2 wiring methods and the competent authority.

! AVERTISSEMENT: Risque d'Explosion – Le remplacement de certains composants rend caduque la certification du produit selon la Classe I, Division 2.

WARNING: Explosion Hazard – Replacing certain components invalidates the product's certification according to Class I, Division 2.

! AVERTISSEMENT - DANGER D'EXPLOSION - Ne connecter pas ou ne débranche pas l'équipement sans avoir préalablement coupé l'alimentation électrique ou la zone est reconnue pour être non dangereuse.

WARNING - EXPLOSION DANGER - Do not connect or disconnect the equipment without first switching off the power supply or ensuring the area is known to be non-hazardous.

! AVERTISSEMENT - L'exposition à certains produits chimiques peut dégrader les propriétés des matériaux utilisés pour l'étanchéité dans les relais.

WARNING - Exposure to certain chemicals may degrade the properties of materials used for sealing in relays.

Cet équipement doit être installé utilisant des méthodes de câblage suivant la norme Class I, Division 2 NEC et/ou CEC.

This equipment must be installed using wiring methods according to Class I, Division 2 standards, NEC and/or CEC.

Panel Mounting

For programmable controllers that can be panel-mounted, to meet the UL Haz Loc standard, panel-mount the device on the flat surface of a Type 1 or Type 4X enclosure.

Mounting Panel Thickness: The mounting panel cannot be more than 5 mm thick.

UL Listed Models Panel Mounting Procedure:

1. Make a panel cut-out of the appropriate size:
• SM35: 92x92mm (3.622"x3.622")
• SM43: 122.5x91.5mm (4.82"x3.6")
• SM70: 193x125mm (7.59"x4.92")
2. Slide the controller into the cut-out, ensuring that the rubber seal is in place.
3. Push the mounting brackets into their slots on the sides of the panel.
4. Tighten the bracket's screws against the panel. Hold the bracket securely against the unit while tightening the screw. The required torque is 0.35 N·m (3.1 in-lb).
5. When properly mounted, the controller is squarely situated in the panel cut-out.

! Caution: Do not apply torque exceeding 0.35 N·m (3.1 in-lb) to tighten the bracket screws. Using excessive force can damage the product.

Dimensions

SM35

• Dimensions: 109mm (4.29") width x 114.1mm (4.49") height
• Side view: 59.6mm (2.346") depth, 6.3mm (0.248") clearance
• Weight: 226g (7.97 oz)

SM43

• Dimensions: 136mm (5.35") width x 105.1mm (4.13") height
• Side view: 61.3mm (2.41") depth, 7.3mm (0.29") clearance
• Weight: 365g (12.87 oz)

SM70

• Dimensions: 210mm (8.26") width x 146.4mm (5.76") height
• Side view: 42.3mm (1.66") depth, 6.5mm (0.25") clearance
• Weight: 654g (23.07 oz)

Wiring

! Do not touch live wires.

• Install an external circuit breaker. Guard against short-circuiting in external wiring.
• Use appropriate circuit protection devices.
• Unused pins should not be connected. Ignoring this directive may damage the device.
• Double-check all wiring before turning on the power supply.
• Caution: To avoid damaging the wire, do not exceed a maximum torque of 0.5 N·m (5 kgf·cm).
• Do not use tin, solder, or any substance on stripped wire that might cause the wire strand to break.
• Install at maximum distance from high-voltage cables and power equipment.

Wiring Procedure

Use crimp terminals for wiring; use 3.31 mm² – 0.13 mm² wire (12-26 AWG):

1. Strip the wire to a length of 7±0.5mm (0.270–0.300").
2. Unscrew the terminal to its widest position before inserting a wire.
3. Insert the wire completely into the terminal to ensure a proper connection.
4. Tighten enough to keep the wire from pulling free.

• Input or output cables should not be run through the same multi-core cable or share the same wire.
• Allow for voltage drop and noise interference with I/O lines used over an extended distance.
• Use wire that is properly sized for the load.
• The controller and I/O signals must be connected to the same 0V signal.

I/O Wiring Diagrams

npn (sink) Input

• Input wiring: Shows connections for 24VDC, 0V, circuit protection device, and digital inputs 0-15, CM, PT, AN, HSC, Reset.
• HSC input wiring: Shows connections for 24VDC, 0V, circuit protection device, and inputs for High-speed Counter and Reset.

pnp (source) Input

• Input wiring: Shows connections for 24VDC, 0V, circuit protection device, and digital inputs 0-15, CM, PT, AN, HSC, Reset.
• HSC input wiring: Shows connections for 24VDC, 0V, circuit protection device, and inputs for High-speed Counter and Reset.

Shaft-encoder

• Shows connections for 24VDC, 0V, circuit protection device, and inputs for High-speed Counter (T+, T-) and Reset.

I/Os

The SM35/43/70-J-RA22 comprises a total of 12 inputs, 8 relays, and 2 analog outputs. Input functionality can be adapted.

Input Functionality Adaptations:

• 12 inputs can be used as digital inputs, wired in a group, and set to either npn or pnp via a single jumper.
• Inputs 5 and 6 can function as either digital or analog inputs.
• Input 0 can function as a high-speed counter, part of a shaft-encoder, or as a normal digital input.
• Input 1 can function as a counter reset, part of a shaft-encoder, or as a normal digital input.
• If input 0 is set as high-speed counter (without reset), input 1 can function as a normal digital input.
• Inputs 7-8 and 9-10 can function as digital, thermocouple, or PT100 inputs. Input 11 can also serve as the CM signal for PT100.

Input Jumper Settings

The following tables detail jumper settings to change input functionality. Accessing I/O jumpers requires opening the controller.

! Incompatible jumper settings and wiring connections may seriously damage the controller.

Digital Inputs 0-11: Set Type

Inputs 7/8: Set Type - Digital or RTD/TC #1

Inputs 9/10: Set Type - Digital or RTD/TC #0

Input 11: Set Type - Digital or CM for PT100

Input 5: Set Type - Digital or Analog #3

Input 6: Set Type - Digital or Analog #2

*Default settings

Analog Output 0: Set to Voltage/Current

Analog Output 1: Set to Voltage/Current

Analog Input

Analog input wiring, current (2/3 wire) and analog input wiring, current (4-wire), and voltage.

Diagram Description: Shows connections for 24VDC, +V, 0V, circuit protection device, and analog inputs AN2, AN3, with options for 2-wire, 3-wire, and 4-wire transmitters.

Shields should be connected at the signal's source.

The 0V signal of the analog input must be connected to the controller's 0V.

Thermocouple

Diagram Description: Shows connections for 24VDC, +V, 0V, circuit protection device, and inputs for Thermocouple 0 (TC0) and Thermocouple 1 (TC1).

• Thermocouple 0: use Input 9 as negative input and 10 as positive.
• Thermocouple 1: use Input 7 as negative input and 8 as positive.

RTD Inputs

• PT100 (Sensor 0): use Input 9 and 10, related to CM signal.
• PT100 (Sensor 1): use Input 7 and 8, related to CM signal.
• 4-wire PT100 can be used by leaving one of the sensor leads unconnected.

Diagram Description: Shows wiring for 2-wire, 3-wire, and 4-wire PT100 connections to the controller's inputs.

Analog Outputs

Diagram Description: Shows connections for Analog Output 0 (AO0) and Analog Output 1 (AO1) to load current and voltage connections.

Relay Outputs

Diagram Description: Shows connections for Relay Outputs 1-8 to external loads, with +V (24VDC), 0V, and N (110/220VAC) terminals.

Increasing Contact Life Span

To increase the life span of the relay output contacts and protect the device from potential damage by reverse EMF, connect:

• A clamping diode in parallel with each inductive DC load.
• An RC snubber circuit in parallel with each inductive AC load.

Power Supply

The controller requires an external 24VDC power supply. The power supply must include double insulation and outputs must be rated as SELV/PELV/Class2/Limited Power.

• Use separate wires to connect the functional earth line (pin 3) and the 0V line (pin 2) to the system earth ground.
• Install an external circuit breaker. Guard against short-circuiting in external wiring.
• Double-check all wiring before turning on the power supply.
• Do not connect either the 'Neutral' or 'Line' signal of the 110/220VAC to the device's 0V pin.
• In the event of voltage fluctuations or non-conformity to voltage power supply specifications, connect the device to a regulated power supply.

Diagram Description: Shows a basic power supply connection diagram with 24VDC, +V, 0V, and circuit protection device.

Earthing the PLC+HMI

To maximize system performance and avoid electromagnetic interference:

• Mount the controller on a metal panel.
• Connect each common and ground connection directly to the earth ground of your system.
• For ground wiring, use the shortest and thickest possible wire.

Communication Port

Caution: Turn off power before making communications connections. Always use the appropriate port adapters.

SM43/SM70-J-RA22

This series comprises a USB port.

Caution: The USB port in SM43 Series is not isolated. Ensure that the PC and the controller are grounded to the same potential.

The USB port may be used for programming, OS download, and PC access.

SM35-J-RA22

This series comprises a built-in RS232 port.

• Signals are related to the controller's 0V; the same 0V is used by the power supply.
• Caution: The serial port is not isolated. If the controller is used with a non-isolated external device, avoid potential voltage that exceeds ±10V.

Use RS232 to download programs from a PC and to communicate with serial devices and applications, such as SCADA.

Pinouts

The pinouts show the PLC port signals.

RS232 Pinout

Opening the Controller

• Before performing these actions, touch a grounded object to discharge any electrostatic charge.
• Avoid touching the PCB board directly. Hold the PCB board by its connectors.

1. Turn off the power supply, disconnect, and dismount the controller.
2. The back cover of the controller has 4 screws in the corners. Remove the screws and pull off the back cover.

Closing the Controller

Replace the back cover of the controller and fasten the corner screws. Ensure the back cover is securely replaced before powering up the controller.

Technical Specifications

Power Supply

Notes:

1. To calculate actual power consumption, subtract the current for each unused element from the maximum current consumption value using the values below:

	Backlight	Ethernet card	Relay Outputs (per output)	All Analog Outputs, voltage/current
SM35/SM43	20mA	35mA	5mA	48mA/30mA*
SM70	80mA	35mA	5mA	48mA/30mA*

*If analog outputs are not configured, subtract the higher value.

Digital Inputs

• Number of inputs: 12 (See Note 2)
• Input type: See Note 2
• Galvanic isolation: None
• Nominal input voltage: 24VDC
• Input voltage: 0-5VDC for Logic '0', 17-28.8VDC for Logic '1' (npn); 17-28.8VDC for Logic '0', 0-5VDC for Logic '1' (pnp)
• Input current: 3.7mA@24VDC
• Input impedance: 6.5KΩ
• Response time: 10ms typical (normal digital inputs)
• Input cable length: Up to 100 meters (normal digital input), Up to 50 meters (shielded, High Speed Input)

High speed inputs

Specifications apply when wired as HSC/shaft-encoder. (See Note 3)

• Duty cycle: 40-60%
• Resolution: 32-bit

Analog Inputs

• Number of inputs: 2 (See Note 2)
• Input type: Multi-range inputs: 0-10V, 0-20mA, 4-20mA
• Input range: 0-20mA, 4-20mA or 0-10VDC
• Input impedance: 37Ω (current), 12.77KΩ (voltage)
• Maximum input rating: 30mA, 1.1V
• Galvanic isolation: None
• Conversion method: Voltage to frequency
• Normal mode: Resolution (except 4-20mA): 14-bit (16384 units); Resolution (at 4-20mA): 3277 to 16383 (13107 units); Conversion time: 100ms minimum per channel (See Note 4).
• Fast mode: Resolution (except 4-20mA): 12-bit (4096 units); Resolution (at 4-20mA): 819 to 4095 (3277 units); Conversion time: 30ms minimum per channel (See Note 4).
• Accuracy: ±0.44%
• Status indication: Yes (See Note 5)

Notes:

4. Conversion times are accumulative and depend on the total number of analog inputs configured. For example, if only one analog input (fast mode) is configured, the conversion time will be 30ms; however, if two analog (normal mode) and two RTD inputs are configured, the conversion time will be 100ms + 100ms + 300ms + 300ms = 800ms.
5. The analog value can indicate faults:

Value: 12-bit	Value: 14-bit	Possible Cause
-1	-1	Deviates slightly below the input range
4096	16384	Deviates slightly above the input range
32767	32767	Deviates greatly above or below the input range

RTD Inputs

• RTD Type: PT100
• Temperature coefficient α: 0.00385/0.00392
• Input range: -200 to 600°C / -328 to 1100°F, 1 to 320Ω
• Isolation: None
• Conversion method: Voltage to frequency
• Resolution: 0.1°C/0.1°F
• Conversion time: 300ms minimum per channel (See Note 4)
• Input impedance: >10MΩ

Auxiliary current for PT100: 150µA typical. Accuracy: ±0.44%. Status indication: Yes (See Note 6). Cable length: Up to 50 meters, shielded.

Notes:

6. The analog value can indicate faults:

Value	Possible Cause
32767	Sensor is not connected to input, or value exceeds permissible range
-32767	Sensor is short-circuited

Thermocouple Inputs

• Input range: See Note 7
• Isolation: None
• Conversion method: Voltage to frequency
• Resolution: 0.1°C/0.1°F maximum
• Conversion time: 100ms minimum per channel (See Note 7)
• Input impedance: >10MΩ
• Cold junction compensation: Local, automatic
• Cold junction compensation error: ±1.5°C/±2.7°F maximum
• Absolute maximum rating: ±0.6VDC
• Accuracy: ±0.44%
• Warm-up time: ½ hour typically, ±1°C/±1.8°F repeatability
• Status indication: Yes (See Note 6)

Notes:

7. The device can also measure voltage within the range of -5 to 56mV, at a resolution of 0.01mV. The device can also measure raw value frequency at a resolution of 14-bits (16384). Input ranges are shown in the following table:

Type	Temp. Range	Type	Temp. Range
mV	-5 to 56mV	N	-200 to 1300°C (-328 to 2372°F)
B	200 to 1820°C (300 to 3276°F)	R	0 to 1768°C (32 to 3214°F)
E	-200 to 750°C (-328 to 1382°F)	S	0 to 1768°C (32 to 3214°F)
J	-200 to 760°C (-328 to 1400°F)	T	-200 to 400°C (-328 to 752°F)
K	-200 to 1250°C (-328 to 2282°F)

Digital Outputs

• Number of outputs: 8 relay (in 2 groups) (See Note 8)
• Output type: SPST-NO (Form A)
• Isolation: By relay
• Type of relay: Tyco PCN-124D3MHZ or compatible
• Output current (resistive load): 3A maximum per output, 8A maximum total per common
• Rated voltage: 250VAC / 30VDC
• Minimum load: 1mA, 5VDC
• Life expectancy: 100k operations at maximum load
• Response time: 10ms (typical)
• Contact protection: External precautions required (see Increasing Contact Life Span in the product's Installation Guide)

Notes:

8. Outputs 0, 1, 2 and 3 share a common signal. Outputs 4, 5, 6, and 7 share a common signal.

Analog Outputs

• Number of outputs: 2
• Output range: 0-10V, 4-20mA (See Note 9)
• Resolution: 12-bit (4096 units)
• Conversion time: Both outputs are updated per scan
• Load impedance: 1kΩ minimum (voltage), 500Ω maximum (current)
• Galvanic isolation: None
• Accuracy: ±0.3%

Notes:

9. Note that the range of each I/O is defined by wiring, jumper settings, and within the controller's software.

Graphic Display

Program

• Data Tables: 32K dynamic data (recipe parameters, datalogs, etc.), 16K fixed data (read-only data, ingredient names, etc.)
• HMI displays: Up to 24
• Program scan time: 15µs per 1kb of typical application

Communication Ports

• Port 1: 1 channel, RS232 (SM35), USB device (SM43/SM70)
• Galvanic isolation: SM35 and SM43 – No, SM70 – Yes
• Baud rate: 300 to 115200 bps
• RS232 (SM35 only): ±20VDC absolute maximum, 15m maximum (50') cable length
• USB device (SM43,SM70 only): Port type: Mini-B, Specification: USB 2.0 compliant; full speed, Cable: USB 2.0 compliant; up to 3m
• Port 2 (optional): CANbus (optional) (See Note 10)

Notes:

10. The user may order and install one or both of the following modules: A serial RS232/RS485 isolated/non-isolated interface module, or an Ethernet Interface module in port 2. CANbus modules documentation is available on the Unitronics website.

Miscellaneous

• Clock (RTC): Real-time clock functions (date and time)
• Battery back-up: 7 years typical at 25°C, battery back-up for RTC and system data, including variable data.
• Battery replacement: Yes. Coin-type 3V, lithium battery, CR2450.

Environment

• Operational temperature: 0 to 50°C (32 to 122°F)
• Storage temperature: -20 to 60°C (-4 to 140°F)
• Relative Humidity (RH): 10% to 95% (non-condensing)
• Operating Altitude: 2000m (6562 ft)
• Shock: IEC 60068-2-27, 15G, 11ms duration
• Vibration: IEC 60068-2-6, 5Hz to 8.4Hz, 3.5mm constant amplitude, 8.4Hz to 150Hz, 1G acceleration.

Disclaimer

The information in this document reflects products at the date of printing. Unitronics reserves the right, subject to all applicable laws, at any time, at its sole discretion, and without notice, to discontinue or change the features, designs, materials and other specifications of its products, and to either permanently or temporarily withdraw any of the forgoing from the market.

All information in this document is provided "as is" without warranty of any kind, either expressed or implied, including but not limited to any implied warranties of merchantability, fitness for a particular purpose, or non-infringement. Unitronics assumes no responsibility for errors or omissions in the information presented in this document. In no event shall Unitronics be liable for any special, incidental, indirect or consequential damages of any kind, or any damages whatsoever arising out of or in connection with the use or performance of this information.

The tradenames, trademarks, logos and service marks presented in this document, including their design, are the property of Unitronics (1989) (R"G) Ltd. or other third parties and you are not permitted to use them without the prior written consent of Unitronics or such third party as may own them.

Document reference: UG_SM35_43_70_RA22.pdf 10/22