TRM501 Wireless Data Transceiver Module

User Manual (Version: V1.0)

Author: Fengting Han

Date: 20210908

Manufacturer: Guangzhou Geoelectron Science & Technology Company Limited

Catalog

1. Technical Specifications

Technical Specifications
Specification name Specification requirements
Frequency range 410~470MHz
Working type half-duplex
Channel spacing 12.5KHz / 25KHz
Modulation type GMSK
Operating voltage 7.5V
Average power consumption (typical) Transmission (high): 7.5W@DC 7.5V
Transmission (low): 4.7W@DC 7.5V
Receive power: 1W
Frequency stability ≤±1.0ppm
Size 69×43×11mm
Weight 168g
Operating temperature -40~+85°C
Storage temperature -45~+90°C
Antenna interface MMCX
Antenna impedance 50ohm
Data interface 20pin
Transmitter Specification
Specification name Specification requirements
RF output power High power (5.0W): 37dBm@DC 7.5V
Low power (2.0W): 33dBm@DC 7.5V
RF power stability ±0.6dB
Adjacent channel inhibition >50dB
Receiver Specification
Specification name Specification requirements
Sensitivity Better than -118dBm@BER 10⁻⁵, 9600bps
Co-channel inhibition >-12dB
Block >70dB
Adjacent channel selectivity >52dB@25KHz
Perturbation resistance stray >55dB
Air rate 9600bps, 19200 bps
Modulation method GMSK

2. Definition of Interface Connector Pin

Pin No. Input/output Definition
1InputVCC
2InputVCC
3Input/outputGND
4Input/outputGND
5NCNo use
6InputEnable (ENABLE UHF radio module, active at high level)
7OutputTXD (UHF data output)
8NCNo use
9InputRXD (UHF data input)
10NCNo use
11NCNo use
12NCNo use
13NCNo use
14NCNo use
15NCNo use
16NCNo use
17InputConfig (default is high station data mode, need to configure low to enter command mode)
18NCNo use
19NCNo use
20NCNo use

3. Transceiver Command Instructions

3.1 Serial Port Configuration in the Factory State

Serial port baud rate setting38400
Data bits8
Stop bit1
Check bitnone

3.2 Basic Command

3.3.1 TX [parameter]
Function: Set the transmission frequency (MHz). Parameter choice: 410.000 – 470.000. Example: TX 466.125 show: “PROGRAMMED OK”
3.3.2 TX
Function: Check the transmission frequency. Example: TX show: “TX 466.12500 MHz”
3.3.3 RX [parameter]
Function: Set receive frequency (MHz). Parameter choice: 410.000 – 470.000. Example: RX 466.125 show: “PROGRAMMED OK”
3.3.4 RX
Function: Check the receive frequency. Example: RX show: "RX 466.12500 MHz"
3.3.5 BAUD [parameter]
Function: Set air baud rate (bps). Parameter choice: 9600, 19200. Example: BAUD 9600 show: “PROGRAMMED OK”
3.3.6 BAUD
Function: Check the air baud rate (bps). Example: BAUD show: “BAUD 9600"
3.3.7 PWR [parameter]
Function: Set the transmission power. Parameter choice: H, L. Example: PWR L show "PROGRAMMED OK"
3.3.8 PWR
Function: Check the transmission power. Example: PWR show "PWR L"
3.3.9 CHANNEL [parameter]
Function: Set the current channel. Parameter choice: 0, 1, 2, 3, 4, 5, 6, 7. Example: CHANNEL 0 show “PROGRAMMED OK"
3.3.10 CHANNEL
Function: Check the current channel. Example: CHANNEL show “CHANNEL 0"
3.3.11 PRT [parameter]
Function: Set current protocol type. Parameter choice: TRIMTALK, TRIMMK3, SOUTH. Example: PRT TRIMTALK show "PROGRAMMED OK"
3.3.12 PRT
Function: Check current protocol type. Example: PRT show "PRT TRIMTALK"
3.3.13 SREV
Function: Check current software version. Example: SREV show "GAOB11012D15.09.12"
3.3.14 SER [parameter]
Function: Set the serial number. Parameter choice: Less than 16 numbers of ASCII. Example: SER TRU201-006 show "PROGRAMMED OK". Note: Serial number is the only remark for the UHF, so it's forbidden to change the serial number by software.
3.3.15 SER
Function: Check the serial number. Example: SER show "SN:TRU201-006". Note: If UHF has never set the SN with no.14 command, so only show the “SN:”
3.3.16 FLOW
Function: Check the lower limit of UHF frequency. Example: FLOW show "FLOW 410"
3.3.17 FUPP
Function: Check the upper limit of UHF frequency. Example: FUPP show "FUPP 470"
3.3.18 SBAUD [parameter]
Function: Set baud rate of Communication interface. Parameter choice: 9600, 19200, 38400, 57600, 115200. Example: SBAUD 38400 show "PROGRAMMED OK"
3.3.19 SBAUD
Function: Check baud rate of Communication interface. Example: SBAUD show "SBAUD 38400"

3.4 Special Commands

3.4.1 CCA [parameter]
Function: Check the received signal strength value (dBm) of the specified channel (MHz). Parameter choice: 410.000 – 470.000. Example: CCA 466.125 show:
1) CCA [parameter 1]:[parameter 2], Example “CCA 466.125:-106.125", indicate the received signal strength value is 466.125MHz in the current channel.
2) "CCA 466.125:ERROR", indicate the test is failed. But it is not indicated that all the channels to be tested are applicable, but it is only the failure for the test operation without connecting the antenna, or too closer to the emission source, etc. may lead to the test failure.
3.4.2 RSSI
Function: Check the received signal strength value. Example: RSSI show:
1) RSSI indicates it doesn't receive any data in the protocol, so it can't show the received signal strength value.
2) RSSI -52.478 -48.063, -52.478 (dBm)

4. Installation of Radio

Figure 1 shown the installation dimension of data transceiver module PCB, firmly fitted the radio modem onto the mounting surface of user system.

Diagram Description: A diagram showing the physical dimensions of the TRM501 module. Key dimensions indicated are 42.40, 9.79, and 68.70. The diagram shows a rectangular PCB with various components and connectors.

Figure 1: Radio Modem Installation Dimension

5. Main Power Supply

The TRM501 can operate with any 7.5V power supply, which comes from the data interface connector with good filtering. The power must supply 2A current at least and be featured with current-limiting, even if you make the radio modem operating on low power mode (2W).

6. Warning

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

7. Photo

Photo Description: The document includes images of the TRM501 module. The first image displays the top label with brand and model information: 'Geoelectron', 'Wireless Data Transceiver Module', 'Model: TRM501', 'Frequency: 410~470MHz', 'GEOELECTRON CORPORATION', and 'S/N:TRM518040057'. The second image shows the underside of the module with a connector.

UHF Antenna Specification

Technical parameters Value
Frequency range (MHz)410~470
Bandwidth (MHz)20
Polarization modeVertical
Gain (dBi)4
Input impedance (Ω)50
Voltage standing wave ratio≤2.0
Maximum power (W)20
Joint typeTNC
Antenna length (mm)293
Antenna weight (g)50
Extreme wind speed (km/h)90
RemarkAntenna structure for elastic whip, and resistance to bending.

Compliance Information

FCC Compliance

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

Caution: Any changes or modifications to this device not explicitly approved by manufacturer could void your authority to operate this equipment.

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 200cm between the radiator & your body.

FCC Rules and Module Procedures

2.2 List of applicable FCC rules: This module meets the requirements of FCC CFR Title 47 Part 90, FCC CFR Title 47 Part 2.

2.4 Limited module procedures: This module is an approval module.

2.6 RF exposure considerations: Integration is strictly limited to fixed categorized end-products where a separation distance of at least 200 cm between the radiating part and any human body can be assured during normal operating conditions.

2.7 Antennas: This module only allows connection antenna in the instruction manual. If other antennas are used, re-evaluation is required.

2.9 Information on test modes and additional testing requirements: This module is test stand-alone; if more modules work together with this module, please evaluate the multiple RF exposure.

2.10 Additional testing, Part 15 Subpart B disclaimer: The final end product must be labeled in a visible area with the following "Contains TX FCC ID: 2ABNA-TRM501". If the size of the end product is smaller than 8x10cm, then additional FCC part 15.19 statement is required to be available in the users manual: This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

FCC OEM Integration Notes

IMPORTANT NOTE: Integration is strictly limited to mobile/fixed categorized end-products where a separation distance of at least 200 cm between the radiating part and any human body can be assured during normal operating conditions.

IMPORTANT NOTE: In the event that these conditions cannot be met (for example certain laptop configurations or co-location with another transmitter), then the FCC authorization is no longer considered valid and the FCC ID cannot be used on the final product. In these circumstances, the OEM integrator will be responsible for re-evaluating the end product (including the transmitter) and obtaining a separate FCC authorization.

IMPORTANT NOTE: This module is intended for OEM integrator only and the OEM integrators are instructed to ensure that the end user has no manual instructions to remove or install the device. The OEM integrator is still responsible for the FCC compliance requirement of the end product, which integrates this module.

LABEL OF THE END PRODUCT: The final end product must be labeled in a visible area with the following "Contains TX FCC ID: 2ABNA-TRM501". If the size of the end product is smaller than 8x10cm, then additional FCC part 15.19 statement is required to be available in the users manual: This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

IC Compliance (Canada)

IC WARNING

Cet appareil contient des émetteurs / récepteurs exemptés de licence conformes aux RSS (RSS) d'Innovation, Sciences et Développement économique Canada. Le fonctionnement est soumis aux deux conditions suivantes :

Cet équipement est conforme aux limites d'exposition au rayonnement ISED établies pour un environnement non contr?lé. Cet équipement doit être installé et utilisé à une distance minimale de 200 cm entre le radiateur et votre corps.

IC OEM Integration Notes

IMPORTANT NOTE: Integration is strictly limited to mobile/fixed categorized end-products where a separation distance of at least 200 cm between the radiating part and any human body can be assured during normal operating conditions.

IMPORTANT NOTE: In the event that these conditions cannot be met (for example certain laptop configurations or co-location with another transmitter), then the IC authorization is no longer considered valid and the IC ID cannot be used on the final product. In these circumstances, the OEM integrator will be responsible for re-evaluating the end product (including the transmitter) and obtaining a separate IC authorization.

IMPORTANT NOTE: This module is intended for OEM integrator only and the OEM integrators are instructed to ensure that the end user has no manual instructions to remove or install the device. The OEM integrator is still responsible for the IC compliance requirement of the end product, which integrates this module.

LABEL OF THE END PRODUCT: The final end product must be labeled in a visible area with the following “Contains TX IC: 11648A-TRM501". If the size of the end product is smaller than 8x10cm, then additional IC statement is required to be available in the users manual: Cet appareil contient des émetteurs / récepteurs exemptés de licence conformes aux RSS (RSS) d'Innovation, Sciences et Développement économique Canada. Le fonctionnement est soumis aux deux conditions suivantes : (1) Cet appareil ne doit pas causer d'interférences. (2) Cet appareil doit accepter toutes les interférences, y compris celles susceptibles de provoquer un fonctionnement indésirable de l'appareil. Cet équipement est conforme aux limites d'exposition au rayonnement ISED établies pour un environnement non contr?lé. Cet équipement doit être installé et utilisé à une distance minimale de 200 cm entre le radiateur et votre corps.

Models: TRM501, 2ABNA-TRM501, 2ABNATRM501, TRM501 Wireless Data Transceiver Module, Wireless Data Transceiver Module

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