●
One of the following safety functions:
- Safe ESD function: “Safe CLOSING" (Safe ESD in direction CLOSE)
- Safe ESD function “Safe OPENING" (Safe ESD in direction OPEN)
●
"SIL seating" configuration
= “Forced limit seating in end position”
Also valid for combination of SafeESD with Safe STOP.
Table 20: Proof test checklist
✎
Configuration
Safe OPENING (Safe ESD in direction OPEN)
✎
Configuration
Safe CLOSING (Safe ESD in direction CLOSE)
✓
1. Is actuator in mid-position or at sufficient distance
from the end positions?
✓
1. Is actuator in mid-position or at sufficient distance
from the end positions?
✓
2. Switch compartment opened?
✓
2. Switch compartment opened?
✓
3. Safe ESDa and Safe ESDb input signals
set to 0 V (low)?
✓
3. Safe ESDa and Safe ESDb input signals
set to 0 V (low)?
Yes
No
➥ Check actuator reaction:
Safety operation initiated?
Yes
No
➥ Check actuator reaction:
Safety operation initiated?
✓
4. Limit switch OPEN operated until step 5.1 was ex-
ecuted?
(Test button [2] turned in direction of the LSO arrow?)
✓
4. Limit switch CLOSE operated until step 5.1 was
executed?
(Test button [1] turned in direction of the LSC arrow?)
Yes
No
➥ Check actuator reaction:
Safety operation stopped?
Yes
No
➥ Check actuator reaction:
Safety operation stopped?
✓
5.1 Safe ESDa and Safe ESDb input signals
set to +24 V DC (high)?
✓
5.1 Safe ESDa and Safe ESDb input signals
set to +24 V DC (high)?
✓
5.2 Actuator operated via local controls or from RE-
MOTE to end position OPEN and then to end position
CLOSED?
✓
5.2 Actuator operated via local controls or from RE-
MOTE to end position OPEN and then to end position
CLOSED?
✓
6. Switch compartment closed?
✓
6. Switch compartment closed?
☒ ✓ = Executed
☒ Yes = Condition met
☒ No = Condition not met
If the answer to one of the questions is no, the safety instrumented system must be checked.
11.2.6. Safe ESD reaction to "Forced limit seating in end position" (limit evaluation) – for actuators with
electronic control unit and limit switches
Proof test checklist for version or configuration:
●
Actuator with electronic control unit and limit switches
●
One of the following safety functions:
- Safe ESD function: “Safe CLOSING" (Safe ESD in direction CLOSE)
- Safe ESD function “Safe OPENING" (Safe ESD in direction OPEN)
●
"SIL seating" configuration
= “Forced limit seating in end position”
Also valid for combination of SafeESD with Safe STOP.
43
Multi-turn actuators
SA 07.2 – SA 16.2/SAR 07.2 – SAR 16.2 Checklists
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