Communication Module 45
Chapter 3 System Description
Communication Ports
Network Ports
Feature Specification
Modbus ports 3 optically isolated RS-232/485 ports,
configurable from TriStation
Connector DB-9-pin DTE standard, shielded, located on
baseplate
RS-232 maximum cable length 15 m (50 ft)
RS-485 maximum cable length 1.2 km (4,000 ft)
Supported transmission rates
(bps)
1200, 2400, 4800, 9600, 19.2 K, 38.4 K, 57.6 K,
115.2 K
Protocols Master or slave, RTU and ASCII modes, optional
parity, 1 stop bit
Serial port Galvanic isolation 500 V DC
Feature Specification
10BaseT network port Ethernet 10 Mbps, protocol-configurable from
TriStation
10BaseT connector RJ-45 standard, shielded, located on baseplate
10BaseT maximum cable length 100 m, using Category 5 twisted-pair cable
10 Mb AUI-type MAU port Supports AUI MAU located on baseplate
Disables 10BaseT RJ-45 connector
100BaseTX Ethernet port 100 or 10 Mbps, speed auto-selected, configurable
from TriStation
100BaseTX connector RJ-45 standard, shielded, located on baseplate
100BaseTX maximum cable
length
30 m, using Category 5 twisted-pair cable
100 Mb MII-type MAU port Supports MII MAU located on baseplate
Disables 100BaseTX RJ-45 connector