User Manual
SIRIUS ACT 3SU1 pushbuttons and signaling devices
System Manual, 02/2015, A5E03457306020A/RS-AB/002
165
AS-Interface
9
9.1
Application areas
With AS-Interface modules, distributed pushbuttons from the SIRIUS ACT range can be
connected to the AS-Interface bus system. With the help of the modular system, you can
assemble your own enclosures with integrated AS-Interface or flexibly modify existing
enclosures.
AS-Interface modules are used as the basis or networked systems within a plant. The
individual AS-Interface components are fully compatible with one another and can be
operated jointly on the yellow AS-Interface cable.
The following solutions are available:
● AS-Interface modules for front plate mounting (Page 167)
● AS-Interface modules for base mounting (Page 168)
● AS-Interface enclosures with 1 to 3 command points (Page 169)
9.1.1
Application area of the AS-Interface modules
AS-Interface safety module (F slave)
Installed in a standard enclosure, the AS-Interface safety module is used for detecting
safety-related switching statuses of one- or two-channel EMERGENCY STOP actuators with
isolated contact elements. For this purpose, a code table with 8x4 bits is transferred via the
AS-Interface bus and evaluated by the safety monitor. When operated properly, the system
fulfills safety category 4 according to EN 13849-1. If an EMERGENCY STOP actuator is
queried on just one channel (terminals for F-IN2 jumpered by means of wire), the system
fulfills a maximum of safety category 2.
In accordance with IEC 61508, the module can be used in loops up to SIL 3. The PFD value
of the entire loop must be calculated by the user.
You can find help and support for calculating at: Safety Evaluation Tool
(http://www.industry.siemens.com/topics/global/en/safety-integrated/machine-safety/safety-
evaluation-tool/Pages/default.aspx)
AS-Interface standard modules (slave 4I/4O and A/B slave 4I/3O)
Mounted in a 3SU1 enclosure, the AS-Interface modules 4I/4O and 4I/3O can query 4
mechanical contacts. The AS-Interface module 4I/4O also enables control of 4 indicator
lights, while the module 4I/3O enables control of 3 indicator lights. The power required is
supplied by the AS-Interface system. In conjunction with an A/B-compatible AS-Interface
master, up to 62 x 4I/3O modules can be operated in one AS-Interface network.