1
3
0
8
6
3
2
0
1
9
-0
4
10
VAA-2E2A-KE1-S/E2, VAA-2E2A-KE1P-S/E2
Product Description
2.5.2
Inputs
General
The switches are connected to removable terminals. One or more mechanical switches can be
connected in series per channel.
Figure 2.2
= 2 mechanical switches (or one two-channel switch)
= 1 mechanical switch
If only one single-channel switch is to be used, input 1 should be used in this case. If input 2 is
not connected, it must be bridged.
Safety Category
The module contains two independent and redundant input channels that individually meet the
requirements of category 4 in accordance with ISO 13849-1.
Crossed Circuit Monitoring
The inputs are monitored for inter-crossed circuits. The crossed circuit monitoring function is
able to detect low-resistance crossed circuits between the two inputs caused by a metallic
connection.
2.5.3
Outputs
The outputs are designed according to the AS-Interface standard. These are switched to
positive potential (PNP technology).
The outputs can be operated in two modes:
1. The outputs are controlled directly by the corresponding data bits of the AS-Interface mas-
ter.
2. The output signals of the AS-Interface master are linked with the secure inputs. The out-
puts are turned on if the master turns them on or if the inputs are in a secure state.
This operating mode is used to control signal lights that must display the state of the inputs
without the master being involved.
1
2
Short circuit jumper
1
2
