Communications gateway connections (optional) – TCI HGA Manual User Manual
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Figure 6.4 – HMI ModbusRTU Connection
Table 6.4 – Modbus Connector Pin Definitions
COM2/3
DB9 Pin
Signal Name
Signal Type
1
no connect
-
2
no connect
-
3
no connect
-
4
D+
RS-485 B (non-inverting)
5
GND
RS-485 SC/G
6
no connect
-
7
no connect
-
8
no connect
-
9
D-
RS-485 A (inverting)
Table 6.5 – ModbusRTU Protocol Settings
Parameter
Default Value
Units
Baud Rate
19200
bps
Data Bits
8
bits
Stop Bits
1
bits
Parity
Even
-
Slave ID
113
-
Communications Gateway Connections (Optional)
If an optional advanced network Communications Gateway is included in the Interface Module see the
appendix for the specific Communications Gateway wiring details.
If the optional network Communications Gateway is present, the integrated ModbusRTU interface on the
HMI Display will not be available. When configured, the Communications Gateway will occupy the
ModbusRTU COM2/3 DB9 connector on the back of the HMI Display.
ModbusRTU
Connection