Data Sheet
Technical System Catalogue/Climate control
Monitoring
3 - 88
In open bayed enclosure systems that are not separate from
one another, cooling units and air/water heat exchangers
with Comfort control should always be used as they may be
placed in master/slave mode via bus cable, part number
SK 3124.100:
Simultaneous activation and deactivation of the devices
Parallel fault and door limit switch function
Even temperature distribution across all sections of the
enclosure
1
2
3
7
4
5
5
6
Master/slave operation
Control cabinets
Wall-mounted unit
Roof-mounted unit
Comfort controller
Door limit switch
Connection terminals
1 and 2 of the cooling
unit
Master/slave unit
1
2
3
4
5
6
7
The interface board (part number SK 3214.200, see
Catalogue 33, page 477) is an extension for TopTherm
cooling units and air/water heat exchangers with Comfort
control. It may be used to monitor a master/slave application
of up to 10 cooling units. Control is achieved via standard-
ised interfaces RS-232 (DB9) or RS-485, a PLC interface.
RS-422 (RJ 45 jack) is the connection to the Rittal CMC III.
Remote monitoring via TCP-IP, graphical interfaces for opera-
tion, evaluation and control, documentation, and connection
to additional sensors for access control facilitates monitoring.
The extension card is built into a 1 U plastic housing.
A voltage supply of 24 V DC is needed. This can be
supplied from the CMC III via long-range power pack or
externally via a Kycon connector.
Master/slave operation
Further information may be found in our assembly and
operating instructions, at
www.rittal.com –> Products –> Product search
–> SK 3124.200.
Warnings and alarms from the interface board
Interior temperaure too
high
Icing
High-pressure sensor
Leakage
Condenser/fan defect
Evaporator coil/fan defect
Compressor defect
Sensor failure, condenser
temperature
Sensor failure, ambient
temperature
Sensor failure, icing
sensor
Sensor failure, conden-
sate level
Sensor failure, internal
temperature
Phase missing or incorrect
EEPROM defect