Rittal 7338.321, Mounting, Installation And Operating Instructions

Page: 40 / 86

5.3.2 Monitoring System CMC III / CMC
‑
TC
Fig. 27: CMC connections
6 Plug (RJ12) for connection to Rittal Monitoring System CMC
‑
TC ( „ failure ” )
7 Plug (RJ12) for connection to Rittal Monitoring System CMC
‑
TC ( „ fire alarm ” )
8 Plug (RJ12) for connection to Rittal Monitoring System CMC
‑
TC ( „ pre
‑
alarm ” )
16 CAN bus CMC III interface (RJ45)
The Computer Multi Control (CMC) is an alarm system for control, network and
server cabinets. It monitors temperatures, humidity, inflow, smoke, energy and many
other physical environmental parameters. The CMC III has a CAN
‑
bus interface to
which various CAN
‑
bus sensors can be connected. The system can be addressed
via the network using a standard browser as well as with the most common network
protocols.
The system DET-AC III Slave also has two CAN
‑
bus interfaces (Fig. 27 /16) through
which the system can be connected directly to the CMC III monitoring system
Ä
Chapter 3.3.3 „Interfaces to the Monitoring System CMC III / CMC
‑
TC”
on page 24 .
The CMC-TC is the predecessor to the CMC III and does not have a CAN
‑
bus inter-
face. The three states „Failure” (Fig. 27 /6), „Fire alarm” (Fig. 27 /7) and „Pre-
alarm” (Fig. 27 /8) can be queried via the RJ12 connectors (Fig. 27 ) using a
CMC-TC I/O Unit.
5.3.3 Door contact / blocking
Door contact switches for monitoring the door position (open/closed) of the pro-
tected cabinet are connected to the connection "Door contact". If the door contact
switch is actuated by opening the door, the extinguishing control of the whole
system blocks. Up to 10 door contact switches can be connected per system. The
lines between the door contact switches and the system are monitored for breaks
and short circuits.
Mounting and installation
Operating Instructions / DET-AC III Slave / 916007 / 05-2016 / en_US 40