Endress+Hauser Proserve NMS80 Functional Safety Manual page 27

Proserve NMS80
Endress+Hauser
5. For every level value, read the output current (mA) and the switch status of the relay
(Ω), record them and assess for accuracy.
The test has been passed successfully if the current values and the switch status of the
relay in step 5 are within the required accuracy limits.
Relay self-monitoring
Relay self-monitoring must only be performed if the "Digital" safety-related signal is used.
Example of terminal designation: If the Digital IO module used for the safety function is
installed in slot D and contacts 3 and 4 are used, Digital D3-4 must be used instead of
Digital Xy-z below.
D
1
1
E
2
1
CDI
C
1
i
1 3
F
2 4 B 1
1
G
2 HR
3 on
WP A 1
SIM
POWER
1. Deactivate SIL mode. Navigate to: Setup → Advanced setup → Deactivate SIL/WHG
and enter the relevant unlocking code (SIL: 7452) for the Reset write protection
parameter.
2. Perform the device self-check as follows. Navigate to: Setup → Advanced setup
3. Setting: Input/output = Digital Xy-z
4. Check whether Contact type = Normally closed (SIL factory setting).
5. Setting: Output simulation = Simulating inactive.
6. Check whether the contact is closed (resistance <1 Ω) between contacts Xy and Xz.
7. Setting: Output simulation = Fault 1
8. Check whether the contact is open (resistance >1 MΩ) between contacts Xy and Xz.
9. Setting: Output simulation = Simulating inactive
10. Check whether the contact is closed (resistance <1) between contacts Xy and Xz.
11. Setting: Output simulation = Fault 2
12. Check whether the contact is open (resistance >1 MΩ) between contacts Xy and Xz.
13. Setting: Output simulation = Simulating inactive
14. Check whether the contact is open (resistance >1 MΩ) between contacts Xy and Xz.
15. Setting: Output simulation = Disable
16. Reactivate SIL mode as per "Device configuration for safety-related applications"
→  14, only points 4, 5, 7, 8, 9. (All other requirements in this section have been
implemented in the context of (initial) commissioning/configuration or in the
context of this proof test.)
The test has been passed successfully if the relay resistance values in steps 6-15 are within
the required level of accuracy.
2 3 4
2 3 4 5 6 7 8
2 3 4 5 6 7 8
2 3 4
Use in safety instrumented systems
A0032388
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