Kübler SMC1.3, Safety Manual

Page: 217 / 235

R60047.0002 - Index 2 EN – page 97 / 115
15 Connection of the Outputs
There are different ways to connect the outputs. The SMCx monitors offers HTL outputs
with SIL3 capability, provided that their configuration is set to two-pole-inverse
operation. The finally resulting Safety Integration Level (SIL) also depends on the remote
circuit and on the configuration.
Relevant Parameters Remarks
Output Mode Output configuration (homogenous / inverse)
• Unipolar outputs provide SIL = 1
• Bipolar homogenous outputs can reach SIL = 2 - 3
• Bipolar inverse outputs can reach SIL = 3
• In case of error, all switching outputs control a LOW level (no more inverting).
16 EDM Function
The EDM function (External Device Monitoring) provides special surveillance of faulty
operation of remote relay or contactors by means of a separate feedback circuit. For
feedback a clocked output signal is used, which is lead back to an input by a positively
driven relay contact. This means that the SMCx monitor has to allocate one output to
drive the relay coil, another output to generate the clock signal, and an input for reading
back of the clock signal.
Parameter „
IN
Function“ appoints the output to be used for control of the relay.
Possible settings are from 17 – 20 and 22. Parameter „
IN Config
appoints the output to
be used for clock generation. Possible settings are from 12 to 19.
The finally resulting Safety Integration Level (SIL) also depends on the remote circuit and
on the configuration. In case of error, a Runtime External RB Error signal will be
produced.
Relevant Parameters Remarks
„Read Back OUT“ Possible inversion of the relay control
„Switch Mode “ Output for controlling the relay coil
„Switch Mode “ Clock output
„Output Mode“ = 0
„ IN Function“
Specification of the relay control
„ IN Config“
Specification of the clock read back
„Input Mode “ Configuration of the read back input (single input for read back)
•
• X24 (IN3,/IN3, IN4,/IN4) must be used for clock read back