1
3
0
8
6
3
2
0
1
9
-0
4
8
VAA-2E2A-KE1-S/E2, VAA-2E2A-KE1P-S/E2
Product Description
If single-channel force-guided mechanical switches are connected, the module can be
upgraded to Performance Level c in accordance with EN ISO 13849-1 if wired appropriately
and if the switch is selected accordingly. If a dual-channel force-guided mechanical switch is
connected, the module can be upgraded to Performance Level e in accordance with
EN ISO 13849-1 if wired appropriately and if the switch is selected accordingly. As per the
approval in accordance with IEC 61508 and IEC 62061, a Safety Integrity Level of up to SIL 3
can be reached. Both module inputs are occupied. The two channels belonging to the
mechanical switch are monitored for crossed circuits. Each LED displays the voltage of the AS-
Interface and the external power supply.
2.3
Peripheral Requirements
Safety Monitor Requirements
The module must only be used as a safety-related slave in an AS-Interface segment with the
corresponding AS-Interface safety monitor as intended. The AS-Interface safety monitor must
meet the requirements of the "Specification of Safe AS-Interface Transmission" system
specification (version 2.01) dated 05/12/2000.
To evaluate a safety-related function in accordance with a safety standard, all components
found in the function must be evaluated in accordance with this standard.
The wiring and programming of the safety monitor determine whether or not the required safety
function performs correctly. This also applies to the required safety response after a code fault
or failure (see also safety monitor documentation). The safety function (including all safety-
related sensors) must be checked prior to initial commissioning. The safety monitor PL
category or SIL must, as a minimum, comply with the PL category or SIL required by the
application.
Cabling Requirements
The requirements set out in EN/IEC 60204-1 or similar must always be observed. The
requirements for the external cabling and selection of connected sensors are based both on
the level of functionality to be achieved, and on the required category (ISO 13849-1, EN/IEC
61508, or EN/IEC 62061).
Switches or Mechanical Contacts
The switches must be positive opening. Combinations of switches that provide an equivalent
level of safety (fault behavior analysis) can be used.
2.4
Connections and Displays
Figure 2.1
+
+
1
1
2
2
S
FAULT
AUX
PWR
ADDR
OUT
01
AS-i
AS-i
0 1
02
AUX
AUX
0 2
S
S+1
S-1
S+2 S-2
