For more information, see FSE-31 pulse encoder interface module user’s manual
(3AXD50000016597 [English]).
￭ SLS function
You must connect the SLS request signal to the FSO module on site. You can also connect
the SLS indication signal of the FSO module to the control system on site. Connect the SLS
signals to the user interface terminal block [X965] according to the circuit diagrams of the
delivery.
For the terminal designations, see the circuit diagrams delivered with the drive. If you use
a switch for SLS activation, obey these general rules:
1. Connect the SLS request switch with two conductors (two-channel connection). Keep
the channels separate.
Note: If you use only one channel in a two-channel implementation, or if the channels
are connected together, the cross fault detection of the FSO module detects a redundancy
fault and activates the fault reaction function.
Note: If you change the input and the parameter settings in the FSO module into a
one-channel implementation, it has an effect on the safety integrity of the safety function.
In this case, the safety data that ABB has calculated for the function is not valid.
2. Use a shielded, twisted pair cable. ABB recommends double-shielded cable.
3. Make sure that the sum resistance for one channel (loop resistance) from the field to the
FSO module is not more than 1 kohm.
4. The maximum permitted cable length between the drive and the activation switch (for
the whole loop) is 250 m (820 ft).
5. Obey the general control cable installation instructions given in the drive hardware manual.
6. Use test pulses in the FSO inputs.
￭ SMS function
It is not necessary to make connections for the SMS function.
￭ SSM function
If necessary, connect the SSM indication signal output of the FSO module. You can use
the user interface terminal block [X965]. Refer to the circuit diagrams of the delivery.
36 Electrical installation
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