Diode Protection; Power Connection - Siemens Pointek CLS200 Operating Instructions Manual

Diode Protection

When driving an external relay with either the solid-state switch and/or relay outputs
using DC power, protection diodes must be connected in the correct polarity across the
relay coil to prevent possible switch/relay damage resulting from inductive spikes
generated by the relay coil.

Power Connection

Nominal
V DC
R
K4
Connect protective earth wire to terminal provided in housing and marked with
Page 22 Pointek CLS200/300 Standard – INSTRUCTION MANUAL
relay coil
customer-supplied
diode protection
24 V DC
22 to 26 V
120 Ω
1 2 3
12 to 250 V AC/DC
customer-supplied
diode protection
48 V DC
46 to 50 V
234 Ω
relay coil
7ML19985JH01