Siemens SENTRON Manual page 108

Operation
7.2 Functions of the inputs and outputs
Functions of the inputs for the power supply of the motor operator (3KC4 only)
Inputs 301 and 302
Inputs 301 and 302 are used for supplying power to the motor operator. This must be
between the following ranges:
● 208 – 277 V AC ± 20 % (166 – 332 V AC)
● 45 – 65 Hz
Current input:
● 10 mA (standby mode)
● 15 A max. (transfer mode)
Overvoltage protection:
● 4.8 kV - 1.2 / 50 µs
Permissible cable cross-section:
● Minimum: 1.5 mm
● Maximum: 2.5 mm
Functions of the control inputs of the motor operator
There are 5 control inputs on the motor operator of the 3KC4 and 3KC8 transfer switching
equipment. Pin 317 is used as the common control terminal for control inputs 312-316.
NOTICE
Damage to the device
Do not connect the control inputs to an external power supply.
On the 3KC8 transfer switching equipment, the transfer is implemented using the electronic
module. By closing contacts 312 and 317, the electronic module can be bridged and the
transfer switching equipment can be used as remotely operated transfer switching
equipment (RTSE). This means the electronic module of the 3KC8 transfer switching
equipment is not active while signals 312 and 317 are active.
Note
When using automatic mode of the electronic module of the 3KC8 transfer switching
equipment, leave control inputs 312-317 open.
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Manual, 08/2017, L1V30368969104A-02