Specifications
AS-Interface
ASIsafe
AS-Interface safety monitors
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Siemens IK PI · 2012
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Overview
Safety monitor with screw terminals (removable terminals)
The safety monitor is the centerpiece of ASIsafe Solution local. It
enables safety-orientated responding to signals from the
ASIsafe (input) slaves on the same AS-i network and has 1-2 en-
abling circuits. A safe application is configured using a PC. Var-
ious application-specific operating modes can be selected for
this. They include, for example, an EMERGENCY-STOP function,
door tumbler and selection of stop Category 0 or Category 1.
To be able to make full use of the AS-Interface diagnostics
options, the monitor can also be operated with an AS interface
address if required. With the aid of the diagnostics module for
STEP 7, which is included on the ASIsafe CD, the full diagnostics
spectrum can be processed further in the higher-level PLC.
The AS-Interface safety monitor is currently offered in the latest
Version 3 (Firmware V3.x) and is available in three expansion
levels.
Both basic/expanded expansion levels are available with one or
two-channeled configured enabling circuits.
The expanded safety monitor is also available as a version with
integrated safe slave which can be used for the control of a safe
AS-i output or for safe coupling of a switch signal on another
safety monitor or F-Link.
The safety monitor is used in an AS-Interface bus system to mon-
itor protective devices, e. g. protective doors, EMERGENCY-
STOP switches, etc.
The safety monitor can be used up to Category 4 according to
EN 954-1, to PL e according to EN ISO 13849-1 and to SIL 3 ac-
cording to IEC 62061/IEC 61508.
Note:
Depending on the choice of safety components used, the com-
plete safety system may also be classified in a lower safety
category.
The safety monitor is mounted on the standard mounting rail.
Disassembly from the standard mounting rail is quick and easy
and requires no tools. With an additional accessory (push-in
lugs), the safety monitor can also be screwed on.
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Application
The safety monitor acts as a "bus-based safety relay". It provides
a user-friendly introduction to safety-orientated communication
over fieldbuses thanks to its simple configuration using the
graphic PC software ASIMON. The standard infrastructure of the
AS-i network (AS-i master under standard PLC, AS-i power
supply unit) can still be used without restriction.
The monitor comes in three expansion levels:
• Basic safety monitor
with starter set of modules and basic functionality
• Expanded safety monitor with expanded features and func-
tionality
• The expanded safety monitor is also available as a version
with integrated safe slave which can be used for the control of
a distributed safe AS-i output or for safe coupling of a switch
signal on another safety monitor or F-Link.
Basic safety monitor versus expanded safety monitor
✓ Available
-- Not available
Number of monitoring modules
The number of devices which the safety monitor can process is
increased with the expanded safety monitor from 32 to 48. Ap-
plications of greater complexity and size can thus be simulated
in the safety monitor.
Logic OR operation
At the logic operation level two elements can be linked by OR
operations in the basic version and up to six in the expanded
version.
Logic AND operation
In addition to the standard AND operation in the main path of an
enabling circuit, an AND operation can also be inserted in an
OR operation on the expanded safety monitor. More than two
elements can be linked in this AND.
Basic Expanded
Number of monitoring modules
32 48
Number of OR gates (inputs)
2 6
Number of AND gates (inputs)
-- 6
Wildcards for monitoring modules
✓ ✓
Deactivating of monitoring modules
✓ ✓
Fault release
✓ ✓
Diagnostics hold
✓ ✓
A/B slaves for acknowledgment
✓ ✓
Safe time functions
-- ✓
"Button" function
-- ✓
Debouncing of contacts
-- ✓
Filtering out of brief disconnections
-- ✓ (as of Version 3)
Control of safe AS-i output/safe coupling
-- ✓ (in version with
integrated safe slave)
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© Siemens AG 2011