Rittal CMC III Installationsaleitung Seite 9


First, depending on the application, please ensure that all components (magnet door kit, door switch
or door comfort handle, CMC III reader unit and door extension) have been correctly mechanically
fitted on the IT rack as per the corresponding assembly instructions.

If applicable, using the digital signal input (fig. 3, item 4) connect the signal output of a fire alarm sys-
tem or building control system, for example.

If applicable, connect a door switch or door comfort handle with opener function for manual opening
of door 1 (fig. 3, item 6) and door 2 (fig. 3, item 5).

Depending on the door type, connect the relevant magnet door kit to door 1 (fig. 3, item 7) and
door 2 (fig. 3, item 8).

If used, connect the external temperature sensor to the door control module connection at the rear
(fig. 3, item 9) and route the measuring sensor to the required measuring point.

If applicable, as an alternative to a door switch or door comfort handle with opener function for ac-
cess control, connect a suitable CMC III reader unit (coded lock or transponder reader) for manual
opening of the doors (fig. 3, item 10).

For climate control applications with a Liquid Cooling Package, connect the door extension kit for
door 1 (fig. 3, item 11) and door 2 (fig. 3, item 12).

Connect each of the two power supplies for the door control module to a power pack (7030.060)
(fig. 3, item 13, 14).
If an A+B power supply is operated in the IT enclosure for the servers, one power pack must be con-
nected to supply circuit A and one power pack to supply circuit B.

Use the enclosed 2-wire cable for wiring. These cables must not be shortened.

Join the two power packs together using the unused connections from the power supply (fig. 4).

Once again, use the enclosed 2-wire cable for wiring. This cable must likewise not be shortened.

Connect the door control module to the CMC III PU or to the neighbouring elements in the CAN bus
using a CAN bus connection cable (fig. 3, items 15, 16).
Status change display:
– The two green and the two red CAN bus LEDs on the CAN bus connection flash.
– The multi-LED of the Processing Unit flashes continually in the sequence green – orange – red.
– The multi-LED of the door control module flashes blue continuously.

Press the "C" key on the CMC III PU (an initial audio signal will sound) and keep it pressed for approx.
3 seconds until a second audio signal is heard.
Status change display on the CAN bus LEDs:
– Continuous green LEDs: CAN bus status "OK".
– Continuous red LEDs: CAN bus status defective.
Status change display on the multi-LED of the Processing Unit:
– Continuous green light: All devices connected to the CAN bus have the status "OK".
– Continuous orange light: At least one device connected to the CAN bus has the status "Warning".
– Continuous red light: At least one device connected to the CAN bus has the status "Alarm".
Status change display on the multi-LED of the door control module:
– Continuous blue flashing: Communication via the CAN bus.
– Green flashing: When the measured value changes, or at least every 5 seconds.
If installation was unsuccessful: see section 1.1.
Note:
Connection cables in various lengths can be purchased from Rittal.
Rittal CMC III Door Control Module
Installation and operation
EN
9