FRIEDHELM LOH Rittal 3273 Series, Руководство по сборке и эксплуатации

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4 Assembly and connection
EN
10 Rittal enclosure cooling unit
Fig. 11: Connection point, potential equalisation
4.6 Making the electrical connection
4.6.1 Bus connection
(only when interconnecting several units
with a Comfort controller)
When using several cooling units, the serial device inter-
face X2 can be used to connect up to ten cooling units
with the bus cable (Model No. 3124.100).
When interconnecting, please note the following:
– De-energise the cooling units to be connected
– Ensure proper electrical insulation
– Make sure the cables are not laid in parallel to power
lines
– Make sure that the lines are short
4.6.2 Connection X3 for serial interface
The interface card (Model No. 3124.200) may be con-
nected to X3. This is used to evaluate system messages
in a PLC, for remotely setting parameters and monitor-
ing, or for integration into the facility management sys-
tem.
Fig. 12: Connection example: Master-slave operation
Key
1 Serial interface (Model No. 3124.200)
2 Serial interface cable
3 Master-slave bus cable (Model No. 3124.100)
RTT Rittal TopTherm cooling units
X1
Supply connection/door limit switch/alarms
X2 Master/slave connection Sub-D, 9-pole
X3 Serial interface Sub-D, 9-pole
St. Sub-D connector, 9-pole
Bu. Sub-D jack, 9-pole
Adr. Address
Note:
The electrical signals at the X2 interface are
of an extra-low voltage (not extra-low safety
voltages in accordance with EN 60 335-1).
Note:
With the last slave unit in the group, do not,
under any circumstances, connect the re-
maining socket of the Y cable 3124.100 into
interface X3 of the cooling unit!
X2
CMC
I/O unit
RTT
Master Adr.: 09
X1
X2 X3
X1
X2 X3
X1
X2 X3
X1
X2 X3
X2 X3 X2 X2
X2 X2
X2
X2
St. St. St. Bu.
St. Bu.
X2
Adr.: 11 Adr.: 12 RTT
Slave RTT
Slave Adr.: 19 RTT
Slave
St. Bu.
St.
Bu.
3
2
1