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Modbus to Ethernet Bridge
15
Table 1 Front Panel Components (See Figure 4)
Item
Component Name Purpose
1 Wire terminal RxD or Rx – Modbus signal:
RS–232: RxD (Receive Data)
RS–422.485: RxD– (Receive Data –)
2 Wire terminal CTS or Rx + Modbus signal:
RS–232: CTS (Clear to Send)
RS–422/485: RxD+ (Receive Data +)
3 Wire terminal RTS or Tx + Modbus signal:
RS–232: RTS (Request to Send)
RS–422/485: TxD– (Transmit Data +)
4 Wire terminal TxD or Tx – Modbus signal:
RS–232: TxD (Transmit Data)
RS–422/485: TxD– (Transmit Data –)
5, 6, 7 Wire terminal NC No connection
8 Wire terminal GND Modbus signal ground
9 Reset switch RST Push to reset and initialize Bridge
10 LED (Red) Fault or
Configuration
ON: Fault in Bridge communication
(or) Bridge is in Configuration Menu
11 LED (Green) Ready ON: Bridge is ready for communication
on both ports
12 LED (Yellow) Active Ethernet Flashing: Indicates activity at Bridge’s
Ethernet port
13 LED (Green) Link Good ON: Bridge has good connection at
Ethernet port
14 Connector (RJ45) Ethernet port RJ45 connector for Ethernet 10BaseT
cable
15 Connector (RJ45) Modbus port RJ45 connector for Modbus RS–232 or
RS–485 cable
16 LED (Yellow) Modbus Tx Flashing: Indicates transmission or
upload at Modbus port
17 LED (Yellow) Modbus Rx Flashing: Indicates reception at Modbus
port
18 Switch Modbus interface
selection
UP: Modbus port is RS–232
DOWN: Modbus port is RS–422/485
19 Wire terminal DC + Operating power, positive
20 Wire terminal Ground Earth ground
21 Wire terminal DC – Operating power, negative
22 Wire terminal Ground Earth ground