Ss1 - Creating Schematic And Block Diagrams; Generating A Schematic Diagram; Fig. 12 Ss1 - Schematic Diagram - Pilz Intern PMC SR6 Manual

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11.3.2 SS1 – Creating schematic and block diagrams
In order to be able to calculate the protective measures suited for a system, start by generating a
schematic diagram of your system with all relevant components. Safety-related block diagrams can
then be derived from this schematic diagram.
11.3.2.1

Generating a schematic diagram

The following graphic shows uses the implementation of the SS1-t safety function in conjunction with
a movable, isolating protective device with position switches as an example. The safety function is
triggered by opening the safety door.
The schematic diagram contains the wiring of the position switches, the connection of STO
inputs, a safety relay with switch-off delay contacts and a controller. Moreover, it illustrates the
interaction between the sensor technology and logic.
Open
Close
d
Confirmation
Fig. 12: SS1 – Schematic diagram
B1, B2
K1
K2
T1
Manual PMC SR6 safety module
1005344-en-US-01
Intern
K2
B1
B2
K1
Safety
relay
Position switches
Safety relay
Controller
Drive controller with integrated PMC SR6 safety module
Inputs
PLC
Outputs
37 47 23
38 48 24
and STO
a
T1
Drive controller
STO
status
Set value
Enable
STO
a
STO
b
M
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b