SIEMENS
11/21
Siemens IC 10 · 2017
* You can order this quantity or a multiple thereof.
Illustrations are approximate
Safety Relays
SIRIUS 3SK Safety Relays
Expansion Units
Input expansions
11
■
Overview
3SK1220 sensor expansion
With the input expansions
•
3SK1220 sensor expansion
•
3SK1230 power supply
the 3SK1 Advanced basic units can be made more flexible.
3SK1220 sensor expansion
The 3SK1220 input expansion allows additional sensors to be
integrated easily and flexibly. The device monitors two 1-channel
sensors or one 2-channel sensor, whatever their output
technology (floating/single-ended).
Note:
The 3SK1220 sensor expansion can only be connected to the
3SK1 Advanced basic units by means of the 3ZY12 device
connector;
see page 11/22
.
3SK1230 power supply
The 3SK1230 power supply makes the 3SK1 devices universally
usable, whatever control supply voltage is to be used.
Note:
Alongside the 3ZY12 device connector, the 3SK1230 power
supply can also be wired to act as a power supply for
3SK1 devices.
■
Benefits
•
A wide voltage range of 110 ... 240 V AC/DC allows the
devices to be used worldwide
•
Low stock keeping due to little variance
•
Flexible expansion of the number of sensors without the need
for additional wiring between the devices
•
Perfect adaptation of the number of inputs to suit the
application
•
Universal use thanks to the wide range of adjustable parame-
ters for sensor expansion (parameters as for 3SK1 Advanced
basic units)
■
Selection and ordering data
Version
SD
Article No.
Price
per PU
PU
(UNIT,
SET, M)
PS*
PG
d
Input expansions
Sensor expansion
For safety-related expansion of the 3SK1 Advanced basic units by adding a further
2-channel sensor or two 1-channel sensors
2
3SK1220-
@
AB40
1
1 unit
41L
Power supply
For supplying 3SK1 Advanced basic units via 3ZY12 device connectors at voltages of
110 ... 240 V AC/DC
2
3SK1230-
@
AW20
1
1 unit
41L
Type of electrical connection
• Screw terminals
1
• Spring-type terminals (push-in)
2
3SK1220-1AB40
3SK1230-1AW20
© Siemens AG 2016