SIEMENS
11/20
Siemens IC 10 · 2017
* You can order this quantity or a multiple thereof.
Illustrations are approximate
Safety Relays
SIRIUS 3SK Safety Relays
Expansion Units
Output expansions
11
■
Overview
3SK121 output expansion
The 3SK121 output expansions can be used to expand all
3SK basic units.
3SK1211 output expansion
The 3SK1211 output expansion is used to expand the safe
outputs of a basic unit by adding another four safe outputs.
These outputs have a switching capacity of AC-15 5 A at a
switching voltage of 230 V. The devices can be connected to
any 3SK basic unit by means of wiring. In addition, the devices
with a 24 V DC control supply voltage can also be connected to
3SK1 Advanced basic units and 3SK2 basic units by means of
the 3ZY12 device connectors.
3SK1213 output expansion
The 3SK1213 output expansion is used to expand the safe
outputs of a basic unit by adding three safe outputs with high
switching capacity. These outputs have a switching capacity of
AC-15 10 A at a switching voltage of 230 V. The devices can be
connected to any 3SK basic unit by means of wiring. As with the
3SK1211, the devices with a 24 V DC control supply voltage can
also be connected to 3SK1 Advanced and 3SK2 basic units by
means of the 3ZY12 device connectors.
Note:
It is only possible to expand the Standard basic units by means
of wiring. Advanced basic units and 3SK2 basic units can be
expanded using the 3ZY12 device connector.
■
Benefits
•
Perfect adaptation of the number of inputs
•
Simple expansion of instantaneous and time-delayed safe
outputs of the Advanced basic units using device connectors
•
When using the device connector the outputs on the terminals
of the basic device can still be used
•
Another two freely parameterizable shutdown functions on
3SK2 basic units when using device connectors
•
Expansion with power contacts for high AC-15/DC-13 currents
in the control circuit
•
No wiring of the feedback circuit to the basic units is required
when using device connectors
•
Shorter installation times
•
Less configuring and testing required
■
Selection and ordering data
Control supply voltage
Number of outputs
as contacting contact block
3ZY12
device
connec-
tors
SD
Article No.
Price
per PU
PU
(UNIT,
SET, M)
PS*
PG
At AC
At 50 Hz
At DC
As NO contact,
instantaneous
switching
As NO contact,
delayed
switching
as NC contact
Instantaneous
switching for
feedback circuit
V
V
d
Output expansions
24
--
4
0
1
No
5
3SK1211-
@
BB00
1
1 unit
41L
--
24
4
0
1
Yes
}
3SK1211-
@
BB40
1
1 unit
41L
110 ... 240
110 ... 240
4
0
1
No
2
3SK1211-
@
BW20
1
1 unit
41L
--
24
3
0
1
Yes
5
3SK1213-
@
AB40
1
1 unit
41L
115
--
3
0
1
No
5
3SK1213-
@
AJ20
1
1 unit
41L
230
--
3
0
1
No
5
3SK1213-
@
AL20
1
1 unit
41L
Type of electrical connection
• Screw terminals
• Spring-type terminals (push-in)
1
2
3SK1211-1BB40
3SK1213-1AB40
© Siemens AG 2016