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The GW-7238D is a gateway that provides conversion between J1939 and Modbus TCP/RTU protocol. For J1939 network, the GW-7238D supports PDU1, PDU2, broadcast and destination specific type of J1939 messages. For Modbus TCP/RTU network, the GW-7238D is a Modbus TCP server / RTU slave to reply the request from Modbus TCP client / RTU master. Utility software is provided for users to configure J1939 and Modbus TCP/RTU setting in the GW-7238D. The application fields can be diesel power-train applications, In-Vehicle networks for trucks and buses, etc.
The following figure shows the application architecture for the GW-7238D
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| Applications |
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- Diesel power-train applications
- Diesel power-train applications
- In-Vehicle networks for trucks and buses
- Truck-Trailer connections
- On Board Diagnostics
- Vehicle Automation
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| Features |
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| Module specs
J1939 Features
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Transmission and reception of all types of J1939 messages, including PDU1, PDU2, broadcast and destination specific
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J1939 Transport Protocol for transmission and reception of large messages (9 - 1785 bytes)
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Supported BAM of Connection Management Message
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Network addresses management
Modbus Features
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Support RS-232, RS-485 and Ethernet interfaces
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Support Modbus TCP server / RTU slave protocol
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Communication support both Modbus TCP / RTU to J1939 at the same time
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Configurable UART baud rates of 9600, 19200, 38400, 57600, 115200 bps
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Allow Max 5 Modbus TCP clients to access GW-7238D simultaneously
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Support Function Code 03 / 04 / 06 / 16 of Modbus functions for reading and writing J1939 Messages
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| Utility |
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Provide Modbus network configuration interface
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Provide J1939 network configuration interface – Network Address / Device Name, etc
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Provide J1939 Input / Output configuration interface
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Provide Modbus monitoring interface
GW-7238D Utility Main Screen
Modbus monitoring table |
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| Comparison Table |
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ICP DAS Fieldbus Gateways Comparison Table:
Support Protocol |
GW-7228 |
GW-7238D |
GW-7433D |
I-7231D |
I-7232D |
I-7241D |
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J1939 |
CANopen Master |
CANopen Slave |
CANopen Slave |
DeviceNet Slave |
Modbus
RTU lave |
Modbus
TCP
Server
RTU Slave |
Modbus
TCP
server
RTU Slave |
DCON
Master |
Modbus
RTU Master |
DCON
Master |
Comm. Interface |
RS-232
RS-422
RS-485 |
RS-232
RS-485
Ethernet |
RS-232
RS-485
Ethernet |
RS-232
RS-485 |
RS-232
RS-485 |
RS-232
RS-485 |
Support Protocol |
I-7242D |
GW-7243D |
GW-7434D |
GW-7552 |
GW-7553 |
GW-7557 |
DeviceNet
Slave |
DeviceNet Slave |
DeviceNet
Master |
PROFIBUS
DP-V0 Slave |
PROFIBUS
DP-V0 Slave |
PROFIBUS
DP-V0 Slave |
Modbus
RTU Master |
Modbus
TCP/RTU/
ASCII Master |
Modbus
TCP Server
RTU Slave |
Modbus
RTU/ASCII
Master/Slave |
Modbus TCP/
RTU/ASCII
Master/Slave |
HART Master |
Comm. Interface |
RS-232
RS-485 |
RS-232
RS-485
Ethernet |
RS-232
RS-485
Ethernet |
RS-232
RS-422
RS-485 |
RS-232
Ethernet |
RS-232 |
Support Protocol |
HART-710 |
GW-5492 |
GW-5493 |
HART Master |
BACnet/IP Server |
BACnet/IP Server |
Modbus
RTU/ASCII Slave |
Modbus
RTU Master |
Modbus
TCP Client |
Comm. Interface |
RS-232
RS-422
RS-485 |
RS-232
RS-485
Ethernet |
RS-232
Ethernet |
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| Hardware Specifications |
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Hardware |
CPU |
80186, 80 MHz or compatible |
CAN Interface |
Controller / Transceiver |
NXP SJA1000T with 16 MHz clock / NXP 82C250 |
Channel number |
1 |
Connector |
5-pin screwed terminal block (CAN_L, CAN_H, N/A for others) |
Baud Rate (bps) |
250 k |
Isolation |
1000 VDC for DC-to-DC, 2500 Vrms for photo-couple |
Terminal Resistor |
Jumper for 120 Ω terminal resistor |
Specification / Protocol |
ISO-11898-2, CAN 2.0A and CAN 2.0B / J1939 |
UART Interface |
COM 1 / Protocol |
RS-232 / Modbus RTU |
COM 1 Connector |
5-pin screwed terminal block (TxD, RxD, RTS, CTS, GND) |
COM 2 / Protocol |
RS-485 (Self-turner inside) / Modbus RTU |
COM 2 Connector |
2-pin screwed terminal block (DATA+, DATA-) |
Ethernet Interface |
Controller |
10/100Base-TX Ethernet Controller (Auto-negotiating, Auto_MDIX) |
Connector / Protocol |
RJ-45 with LED indicator / Modbus TCP |
LED |
Round LED |
PWR / J1939 / MODBUS / ERR |
Power |
Power supply |
Unregulated +10 ~ +30 VDC |
Protection |
Power reverse polarity protection, Over-voltage brown-out protection |
Power Consumption |
2 W |
Mechanism |
Installation |
DIN-Rail |
Dimensions |
122mm x 72mm x 33mm (L x W x H) |
Environment |
Operating Temp. |
-25 ~ 75 ℃ |
Storage Temp. |
-30 ~ 80 ℃ |
Humidity |
10 ~ 90% RH, non-condensing |
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| Ordering Information |
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GW-7238D CR |
J1939 to Modbus TCP Server / RTU Slave Gateway included CA-0910 cable(RoHS) |
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| Optional Accessories |
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| CA-0910-C |
9-pin Female D-sub & 3-wire CAN bus cable (1M) |
| SG-770 |
7/14 channel Surge Protector |
| 4PCD-002 |
EMI Ferrite Split/Snap-On Core |
| M12A-5P-IP68 |
Field-Installation A-coded 5-pin Female |
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| TOP |
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