●
"SIL seating" configuration
= “Forced limit seating in end position”
(safety operation is stopped by limit switch tripping)
Test procedure
During the test, the reaction of the Safe ESD function to limit switch tripping during
safety operation is checked.
During Safe ESD operation, the actuator has to stop when reaching the position set
via limit switching.
Test procedure
1. Operate actuator in mid-position or at sufficient distance from the end positions.
2. Initiate safety operation:
→
Set Safe ESDa and Safe ESDb input signals to 0 V (low).
Check seating via limit switches:
3. Wait until actuator has reached the limit end position and has activated the
pertaining limit switch.
➥
The safety function reaction to the limit switch signals is correct if safety opera-
tion is stopped.
4.
Set Safe ESDa and Safe ESDb input signals to +24 V DC (high) after the
test.
8.4.7. Safe ESD reaction to "Forced torque seating in end position" (torque after limit evaluation):
check
Configuration
This test is required for the following versions or configurations:
●
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)
●
"SIL seating" configuration
= “Forced torque seating in end position”
(Safety operation is stopped by tripping the torque switches (overload protection).
Provided that the respective limit switch tripped before).
Test procedure
During the test, the reaction of the Safe ESD function to torque switch tripping (after
limit switch tripping) during safety operation is checked.
The red test buttons [1] and [2] of the control unit are used for the test. These can
be used to operate the switches manually.
Figure 14: Electromechanical control unit
●
Turn test button [1] in direction of the TSC arrow:Torque switch CLOSED trips.
●
Turn test button [2] in direction of the TSO arrow: Torque switch OPEN trips.
Test procedure
1. Use standard controls to operate actuator into the end position of the con-
figured Safe ESD function (until limit switch in end position trips).
2. Open the switch compartment
30
Multi-turn actuators
Tests and maintenance SA 07.2 – SA 16.2/SAR 07.2 – SAR 16.2
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