CSDI 162
C-DIAS SAFETY DIGITAL INPUT MODULE
Page 26
05.10.2018
Implementation
•
For switch S1, the start button, and S2, the Emergency Stop switch, 2 safe in-
puts are required for each.
•
Two safe outputs are needed for control of the relay K1 and the signal lamp P1.
•
The normally open contacts of the start button S1 are connected to the signal
outputs A and B over 2 channels (cross-circuit detection) and wired to 2 safe
inputs.
•
The normally closed contacts of the Emergency Stop switch S2, are connected
to the signal outputs A and B over 2 channels (cross-circuit detection) and wired
to 2 safe inputs.
•
The monitor contact of the K1 relay switch is read back.
The following block diagram shows the implementation of the circuit with help from a
CSDI 1621 Safety input module and a single CSCP 012 Safety CPU the previously men-
tioned external components. Here, it is assumed that the both modules are mounted on a
correctly installed C-DIAS module carrier.
Fig. 9: Example structure diagram
