11.2.4. Safe ESD reaction to “Limit seating with overload protection” (limit and/or torque evaluation) –
for actuators with electromechanical control unit
Proof test checklist for version or configuration:
●
Actuator with electromechanical control unit
●
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)
●
Configuration of “SIL seating”
= “Limit seating with overload protection”
Also valid for combination of Safe ESD with Safe STOP.
Table 25: Checklist 5
✎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?
⎕ ✓5.3 Actuator operated to mid-position or at sufficient
distance from the end positions?
⎕ ✓5.3 Actuator operated to mid-position or at sufficient
distance from the end positions?
⎕ ✓
6. Safe ESDa and Safe ESDb input signals
set to 0 V (low)?
⎕ ✓
6. 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?
⎕ ✓7.Torque switch OPEN operated until step 8 was
executed?
(Test button [2] turned in direction of the TSO arrow?)
⎕ ✓7.Torque switch CLOSE operated until step 8 was
executed?
(Test button [1] turned in direction of the TSC arrow?)
⎕ Yes
⎕ No
➥ Check actuator reaction:
Safety operation stopped?
Display illuminated in red?
⎕ Yes
⎕ No
➥ Check actuator reaction:
Safety operation stopped?
Display illuminated in red?
⎕ Yes
⎕ No
➥ Check SIL module signal behaviour:
SIL fault signal?
SIL failure output (NC contact) = closed)
⎕ Yes
⎕ No
➥ Check SIL module signal behaviour:
SIL fault signal?
SIL failure output (NC contact) = closed)
⎕ ✓
8. Safe ESDa and Safe ESDb input signals
set to +24 V DC (high)?
⎕ ✓
8. Safe ESDa and Safe ESDb input signals
set to +24 V DC (high)?
⎕ ✓9.Torque fault of standard controls acknowledged?⎕ ✓9.Torque fault of standard controls acknowledged?
⎕ ✓10. Switch compartment closed?⎕ ✓10. 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.
11.2.5. Safe ESD reaction to “Forced limit seating in end position” (limit evaluation) – for actuators with
electromechanical control unit
Proof test checklist for version or configuration:
48
Part-turn actuators
Checklists with AC 01.2-SIL/ACExC 01.2-SIL
To Next Page
Loading...
Need help?
General
