Engineering System - Siemens Automation and Drives Group

■ Overview
The SIGUARD safety system is based on special terminal and
power modules that can be combined with the ET 200S motor
starters and a failsafe kit to achieve the highest safety category
4 (according to EN 954-1). It enables the evaluation of emergency
stop circuits, the monitoring of protective doors or the implementation
of time-delayed shut-downs. The costs involved in
the configuration and wiring of conventional safety systems are
no longer incurred. All standard safety applications can be covered
with SIGUARD (see the ET 200S manual for examples of
applications).
■ Design
Terminal modules for SIGUARD power modules
The terminal modules integrate the SIGUARD power modules.
Using different terminal modules it is possible to separate various
safety circuits by function or cascade them. Each group of
this type has to be terminated with a SIGUARD PM-X connection
module.
The TM-PF30 S47-B1 terminal module always stands at the
beginning of a safety segment and integrates either the PM-
DF1 power module for emergency stop applications or the
PM-DF2 power module for protective door monitoring. The 2channel
connection of the safety sensor (e.g. emergency stop
sensor) as well as the 24-V supplies for the electronics (U1 )
and the contactors (U2 ) of the motor starters have to be connected
to this terminal module. Connections for the ON button
(enable) and the safe output of the power module are also
available.
The TM-PF30 S47-B0 terminal module is used for the cascading
of subordinate safety segments and integrates either the
PM-D F1 power module for emergency stop applications or
the PM-D F2 power module for protective door monitoring. No
additional auxiliary voltage has to be connected to this terminal
module. The supply is fed through the terminal module
voltage buses from the preceding PM-D F1 or PM-D F2 power
module. Switching off the voltage of the preceding power
module means that the terminal module has no voltage either.
The TM-PF30 S47-C1 terminal module always stands at the
beginning of an expansion of a safety segment in a new station,
e.g. in an interlaced configuration. It integrates the PM-D
F3 power module for time-delayed shut-down or the PM-D F4
power module for direct shut-down in physically separated
ET 200S stations. The 24 V supplies for the electronics (U1)
and for the contactors (U2) are fed in anew. The shut-down
command of a preceding ET 200S station is integrated
through a safe input. Separate terminals are available for connecting
the feedback circuit to the upstream ET 200S station.
It is not possible to connect safety sensors to this terminal
module.
The TM-PF30 S47-C0 terminal module is used for the cascading
of subordinate safety segments and integrates either the
PM-D F3 power module for time-delayed shut-down or the PM-
D F4 power module. Only the U2 supply voltage has to be connected
to this terminal module. The U1 supply is fed through
the terminal module voltage buses of the preceding power
module (voltage group section). It is not possible to connect
safety sensors to this terminal module.
The TM-PF30 S47-D0 terminal module is used to integrated
the PM-D F5 power module. At this terminal module it is possible
to forward safe signals to external systems through four
groups, each with two safety relay contacts in redundant configuration.
The terminal module must always be positioned between
one of the afore-mentioned terminal modules and a terminal
module for the TM-X connection module. It is not
possible to connect safety sensors to this terminal module
Process I/O
ET 200S distributed I/O
SIGUARD safety engineering
TM-X terminal module for SIGUARD connection module
For connecting an external incoming supply contactor (second
shut-down option) in category 3 and 4. The SIGUARD connection
module is inserted to the right of the last motor starter in a
safety segment. The terminals for connecting the positively
driven NC contact of the contactor are located along side the terminals
for connecting the contactor coil likewise on the TM-X terminal
module. If no redundant contactor is required in
category 2 (EN 954-1), for example, the feedback circuit has to
be closed at these terminals with a jumper. This arrangement is
also used instead of SIGUARD power module as an interface to
the external safety relay when external safety relays are used.
SIGUARD PM-D F1/F2/F3/F4/F5 power modules
Following SIGUARD PM-D power modules are available for selection:
PM-D F1 for evaluating emergency stop circuits with the function
"monitored start“
PM-D F2 for monitoring protective doors with the function "automatic
start"
PM-D F3 as PM-D F1/F2 expansion for time-delayed shutdown
PM-D F4 for expanding safety circuits with other ET 200S motor
starters, e.g. in another row
PM-D F5 for transmitting the status of PM-D F1...4 over four
floating release circuits to external safety devices (contact
multipliers)
No additional PM-S power module is required when using the SI-
GUARD power modules. SIGUARD PM-D F1/F2/F3/F4 power
modules monitor auxiliary voltages and contain the complete
functionality of a safety relay. The PM-D F1 and PM-D F2 modules
can be combined with the PM-D F3 or PM-D F4 modules. A
PM-D F5 can be arranged in any position between PM-D F1...4
and a PM-X.
Every safety circuit, starting with a PM-D F1 ... 4, has to be terminated
with a PM-X.
Failsafe kit
Every standard motor starter in a safety segment has to be supplemented
with the failsafe kit (F-kit) in order to monitor the
switching function. F-kit 1 supplements the DS1-x direct starter,
F-kit 2 supplements the RS1-x reversing starter.
The F-kits comprise
Contact carriers for the terminal modules,
one or two auxiliary switch blocks for the contactor / contactors
of the motor starter, and
connecting cables.
High Feature motor starters and their terminal modules come
equipped with the F-kit functions.
Siemens ST PCS 7 · October 2004
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