Siemens SENTRON, Manual

Page: 107 / 224

Operation
7.2 Functions of the inputs and outputs
Manual, 08/2017, L1V30368969104A-02
107
Note
In the case of the 3KC8 transfer switching equipment, the inputs for the power supply are
located on the electronic module. These are described in the section titled Inputs for voltage
measurement and power supply (Page 115).
On the one hand, the motor operator is supplied with power via its inputs (3KC4 only), and
on the other, remotely operated transfer switching is enabled via these inputs.
Designation Pin Meaning Explanation Properties Recommended
cable cross-
section
Power supply
(3KC4 only)
301 - Power supply 208 – 277 V AC
± 20%;
45 … 65 Hz
1.5 - 2.5 mm
2
302 - Power supply
Control inputs of
the motor opera-
tor
312 Enable Ctrl Remote mode enabled (if closed
with 317)
Use only with
floating contacts
and supply via
pin 317
Maximum cable
length: 100 m
1.5 - 2.5 mm
2
313 OFF Priority command for the OFF
position (if closed with input 317)
314 II Command for transfer to position II
(if closed with input 317)
315 I Command for transfer to position I
(if closed with input 317)
316 O Command for transfer to position O
(if closed with input 317)
317 C Common control terminal for inputs
312-316
NOTICE
Damage to the device
Do not connect inputs 312 to 317 to the power supply.