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B-7
Control wiring
Wiring of voltage releases
During pick-up, the power consumed is approximately 150 to 200 VA.
For low control voltages (12, 24, 48 V), maximum cable lengths are imposed
by the voltage and the cross-sectional area of cables.
Recommended maximum cable lengths (meter).
12 V
24 V
48 V
2.5 mm
2
1.5 mm
2
2.5 mm
2
1.5 mm
2
2.5 mm
2
1.5 mm
2
MN
U source 100 % –
–
58
35
280
165
U source 85 % –
–
16
10
75
45
MX-XF
U source 100 % 21
12
115
70
550
330
U source 85 % 10
6
75
44
350
210
Note
:
the indicated length is that of each of the two wires.
24 V DC power-supply module
External 24 V DC power-supply module for Micrologic (F1-, F2+)
do not connect the positive terminal (F2+) to earth
b
the negative terminal (F1-) can be connected to earth, except in IT systems
b
a number of Micrologic control units and M6C modules can be connected to the
b
same 24 V DC power supply (the consumption of a Micrologic control unit
or an M6C module is approximately 100 mA)
do not connect any devices other than a Micrologic control unit or an M6C
b
module if voltage > 480 V AC or in an environment with high level of electromagnetic
desturbance
the maximum length for each conductor is ten metres. For greater distances,
b
it is advised to twist the supply wires together
the 24 V DC supply wires must cross the power cables perpendicularly.
b
If this is difficult, it is advised to twist the supply wires together
the technical characteristics of the external 24 V DC power-supply module
b
for Micrologic control units are indicated on
page A-28
.
Communication bus
do not connect the positive terminal (E1) to earth
b
the negative terminal (E2) can be connected to earth
b
a number of "device" or "chassis" communication modules can be connected
b
to the same 24 V DC power supply (the consumption of each module is
approximately 30 mA).
Note:
wiring of ZSI: it is recommended to use twisted shielded cable. The shield must be
connected to earth at both ends.
Installation
recommendations