Connect serial Modbus devices to an industrial network
GW MR gateways provide Modbus RTU master or slave operation on the serial side and a model-specific industrial Ethernet slave interface on the network side. Select the network protocol first, then the one-, two- or three-channel version. The network protocol is fixed by the model designation; the five network options are separate products.
Model selection
| Network protocol | One-channel model | Two-channel model | Three-channel model |
|---|
| PROFINET | GW-PN-1MR | GW-PN-2MR | GW-PN-3MR |
| EtherCAT | GW-EC-1MR | GW-EC-2MR | GW-EC-3MR |
| EtherNet/IP | GW-EIP-1MR | GW-EIP-2MR | GW-EIP-3MR |
| CC-Link IE Field Basic | GW-CB-1MR | GW-CB-2MR | GW-CB-3MR |
| Modbus TCP | GW-MT-1MR | GW-MT-2MR | GW-MT-3MR |
Each channel-count option supports RS232, RS485 and RS422. The counts below describe the supported serial interface modes and must not be added together to calculate independent physical ports.
| Model suffix | RS232 channels | RS485 channels | RS422 channels |
|---|
| 1MR | 1 | 1 | 1 |
| 2MR | 2 | 2 | 2 |
| 3MR | 3 | 3 | 3 |
Industrial network specifications
| Model group | Network interfaces | Transmission rate | Maximum input data | Maximum output data |
|---|
| GW-PN | 2 | 10/100Mbps, full duplex | 512 bytes | 512 bytes |
| GW-EC | 3 | 100Mbps | 512 bytes | 512 bytes |
| GW-EIP | 2 | 100Mbps | 512 bytes | 512 bytes |
| GW-CB | 2 | 100Mbps | 500 bytes | 500 bytes |
| GW-MT | 2 | 100Mbps | 512 bytes | 512 bytes |
| Network characteristic | Specification |
|---|
| Network role | Slave; remote I/O station |
| Station allocation | 1 station |
| Address setting | According to the selected PROFINET, EtherCAT, EtherNet/IP, CC-Link IE Field Basic or Modbus TCP specification |
| Topology | Bus |
| Transmission medium | CAT5 Ethernet cable |
| Distance between network stations | ≤100m |
| Isolation | Electrical isolation from the field side; isolation voltage unspecified |
Serial communication settings
| Setting | Available values |
|---|
| Serial interfaces | RS232, RS485, RS422 |
| Serial protocol role | Modbus RTU master or slave |
| Baud rates | 1200bit/s, 2400bit/s, 4800bit/s, 9600bit/s, 19200bit/s, 38400bit/s, 57600bit/s, 115200bit/s |
| Other baud rates | Available by customization |
| Serial data-bit settings | 7, 8 or 9 bits |
| Stop bits | 1 or 2 bits |
| Parity | None, odd or even |
| Duplex modes | Half duplex or full duplex |
| Modbus function codes | 01H, 02H, 03H, 04H, 05H, 06H, 0FH, 10H |
Choose the serial framing and duplex mode for the connected interface and device. The hardware setting range does not imply that every combination is a valid Modbus RTU configuration.
Power and terminal wiring
| Characteristic | Specification |
|---|
| Supply voltage | 24VDC, +20%/-15% |
| System supply current | <150mA |
| Power connection | Push-in terminal blocks |
| Minimum conductor size | 0.34mm² / AWG22 |
| Maximum conductor size | 1.5mm² / AWG16 |
| Stripping length | 9-10mm |
Dimensions and operating conditions
| Characteristic | Specification |
|---|
| Dimensions, H × W × D | 80mm × 24mm × 115mm |
| Protection rating | IP20 |
| Pollution degree | 2 |
| Operating temperature | -10°C to +55°C |
| Storage temperature | -20°C to +85°C |
| Relative humidity | 5-95%RH, non-condensing |
