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Signal behavior of SIL ready and SIL failure outputs:
• SIL ready/ Absence of fault to be detected by diagnostics:
NO (NO contact) output = closed
NC (NC contact) output = open
SIL fault displayed via SIL failure output
For further information on SIL faults and in particular to assist in troubleshooting, refer to
chapter <Indications>.
In case of mains failure, the SIL module would no longer be operable.
The operation instructions pertaining to the device must be observed for general
commissioning.
For the Safe ESD function, operation into the safe position can be performed irrespective of
the selector switch position (LOCAL - OFF - REMOTE) or the operating status. Even in
positions LOCAL and OFF or at system start, the actuator can start by triggering the safety
function.
Risk of immediate actuator start when switching on
Risk of personal injuries or damage to the valve
→ Ensure that high level is present at the Safe ESDa/ESDb inputs when switching
on (standard: +24 V DC).
Designation
Wiring diagram
Customer connections for
control (typical assignment)
Safe ESDa Digital input for Safe ESD function XK 31 XK 3
Safe ESDb Redundant input for Safe ESD function XK 32 XK 5
0 V Reference potential for Safe ESDa and Safe ESDb XK 33 XK 7
Safe STOP CLOSE Digital input for Safe STOP function in direction CLOSE XK 35 XK 8
0 V Reference potential for Safe STOP CLOSE XK 37 XK 9
Safe STOP OPEN Digital input for Safe STOP function in direction OPEN XK 36 XK 10
0 V Reference potential for Safe STOP OPEN XK 38 XK 11
SIL ready NO contact of SIL fault signal XK 40 XK 15
SIL failure NC contact of SIL fault signal XK 39 XK 14
Com. Reference potential for SIL fault signal XK 42 XK 16
Thermal fault Motor protection tripped
Torque fault Torque fault in directions OPEN and/or CLOSE
Fault position feed-
back
Current position feedback is outside permissible range.
Phase failure
One phase of power supply is missing.
Controls are not supplied with mains voltage
Power supply failure The safety-related part of controls is without power supply.
Failure of actuator
monitoring
Actuator not operated on Safe ESDa and ESDb command.
Fault in redundant
wiring Safe ESD
Both signals Safe ESDa and Safe ESDb are not simultaneously on the same
level.
Internal error Internal error of the SIL module
! CAUTION
Multi-turn actuators
SA series with Control 3.XX /NI/SIL
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