Figure 12 - Controller Module - Honeywell HC900 User And Installation Manual

Controller Module
C30 and C30S, C50 and C50S, C70 and C70S, C75 and C75S Controllers share the same features, with exceptions
noted.
1 CPU model number (C30 and C30S, C50 and C50S , C70 and C70S, C75 and C75S).
2 Lithium battery (battery tray), which is readily accessible for field replacement. Battery tray on
Controllers C30/C30S, C50/C50S, C70/C70S, and C75/C75S.
3 Serial Interface Ports
For legacy systems, two serial ports, S1 and S2, each configurable as RS-232 or RS-485 provides
interfaces to a PC, external modem, Modbus devices or Operator Interfaces.
For new systems, two galvanically isolated RS-485 serial ports, S1 and S2 provide interfaces to PC
using RS-485 to usb cable. External modem or Modbus devices may be interfaced using RS-485 to
RS-232 converter. RS-485 interfaces to PC, Control Stations or Modbus devices/host.
4 Ethernet LED status indicators
for communications functions
5 Connection to I/O port of
Scanner Module.
C50/C50S/C70/C70S,
C75/C75S only
6 Second Ethernet (E2) Host
Connection to PC applications
or peer HC900 controllers.
C70/C70S/C75/C75S only
7 First Ethernet (E1) Host
Connection to PC applications
or peer HC900 controllers
8 LED status/diagnostic indicator
for serial port S2 (left)
9 LED status/diagnostic indicator
for serial port S1 (right)
10 LED status/diagnostic indicator
for controller module
11 Mode switch (Pgm, Run/Pgm,
Run). Not present on
C75/C75S; see RSM
Redundant controller rack contains two C75s or C75Ss. Left CPU is designated CPU-A, right CPU is CPU-B; either
CPU can be Lead.
Revision 6
21 April 2017
HC900 Process & Safety Controller User and Installation Manual
Figure 12 – Controller Module
29