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4 Assembly and connection
GB
CMC
1
2
RTT
Adr.: 09
Master
X1
X2
X3
St.
X2
X3
Bu.
3
Fig. 19: Connection example: Master/slave operation
Key
1
Serial interface
2
Serial interface cable
3
Master/slave bus cable (Model No. SK 3124.100)
RTT Rittal TopTherm cooling units
X1
Supply connection/door limit switch/alarms
X2
Adr.: 06
1
L2
L1
PE 1 2 3 4 5
X10
N
Fig. 20: Connection example: Door limit switch and master/slave operation
Key
1
Master cooling unit
2
Slave cooling units
3
Twin-door enclosure with two door limit switches
4
Enclosure with door limit switch
14
RTT
Adr.: 11
RTT
Slave
Slave
X1
X1
X2
X3
X2
St.
X2
St.
X2
X2
X2
Bu.
St.
X2
X2
Adr.: 11
Adr.: 12
2
2
L1
L2 L3
PE 1 2 3 4 5
L2
L1
PE 1 2 3 4 5
X10
X10
N
1
2
3
4
Adr.: 12
X3
X2 X2
Bu.
St.
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
X2
Adr.: 13
2
L1
L1
L2 L3
PE 1 2 3 4 5
X10
X10
4
3
4
4.6.2 Installing the power supply
• Complete the electrical installation by following the
wiring plan on the rear of the cooling unit
(see Fig. 1 on page 5, for key see page 20).
• If you would like the system messages from the
cooling unit to be evaluated via the system
message relay, you should also connect a suitable
low-voltage cable to connection clamps 3 – 5.
X2
X2
Adr.: 14
Adr.: 15
2
2
L2 L3
PE 1 2 3 4 5
L1
L2 L3
PE 1 2 3 4 5
X10
5 6
3
Rittal cooling unit assembly instructions
RTT
Adr.: 19
Slave
X1
X2
X3
St.
X2
X2
Bu.
X2
X10
Adr.: 16
2
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