Performing The Electrical Installation; Bus Connection (Only In Conjunction With Several Units With A Comfort Controller); Installing The Power Supply - Rittal CS 9761.212 Montageanleitung Und Bedienungsanleitung

4 Assembly and connection

4.5 Performing the electrical installation

EN
4.5.1 Bus connection
(only in conjunction with several units
with a Comfort controller)
When using several cooling units, the serial device
interface X2 can be used to connect up to ten cool-
ing units with the bus cable (Model No. SK 3124.100).
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).
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.
CS 9761.212, CS 9762.212
Fig. 6: Electrical wiring plan no. 1
30
Mains
L2
X1
PE L1 PE 1
N
6
1 2 3 1
L N S1 K2
Power
PE
A1
M1
1 2 3
C1
S
R
M1
C
F3

4.5.2 Installing the power supply

– Power supply is via the 9-pole female connector.
Complete the electrical installation by following the
wiring plan (see Fig. 6 and 7).
– If you would like the system messages from the
cooling unit to be evaluated via the system mes-
sage relay, you should also connect a suitable
low-voltage cable to connection clamps 3 – 5.
S1
2 3 4 5
11
X2 X3
K3
12 14
3 8
Hz
TB
K3
2 3 2 1
MS1 Serial
K1
NTC_I
Kx
NTC_E
NTC_C
NTC_A
Level
Term
2
M2 M4
F2 1
1 2 3 1 2 3
C4
C2
M M
1~ 1~
M2 M4
RITTAL outdoor cooling unit assembly and operating instructions
A2
2
B1
2
B2
2
B3
2
B4
2
B5
4
P F2