User`s guide

Page 3

Controlinc 1746-C (Version 5.21) Network Master Users Guide (2004-11-18)

The 1746-C master will handle network communication, error detection, alarming, and network

recovery.

Other features include:

• Reporting of inaccessible actuators

• Reporting of network faults

• Emergency shutdown broadcasting

• Minimal Interfacing with the Relay Ladder Logic (RLL) program in the PLC CPU module

Each 1746-C module can support a single network of up to 60 valve actuators. Multiple modules can

be installed in an SLC-500 system rack to provide support for multiple networks (up to 60 actuators

each).

Note 1: It is important to note that the 1746-C Network Master may be used in any slot of the 1746

rack, not just slot 1 next to the SLC-500 CPU.