Sls Function; Sms Function; Ssm Function - ABB ACS880-07 User Manual

48 Electrical installation
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SLS function

The user must wire the SLS request signal to the FSO module on site. The user can also
wire the SLS indication signal of the FSO module to the control system on site. Wire the
SLS devices to the [X965] terminals according to the circuit diagrams of the delivery.
For the terminal designations, see the table above and 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).
Note: Keep the channels separate. If you use only one channel in a two-channel
implementation, or if the first and second channels are connected together (for example,
in a chain), the cross-fault detection of the FSO module trips and activates the STO
function of the drive as it detects a redundancy fault.
Note: If you change the input and the parameter settings in the FSO module into a
one-channel implementation, it affects the safety integrity of the safety function. The
safety data that ABB has calculated for the function is not valid.
2. Use a shielded, twisted pair cable. We recommend a double-shielded cable.
3. Make sure that the sum resistance for one channel (loop resistance) from the field to
the FSO module does not exceed 1000 ohms.
4. The maximum allowed 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 (see section I/O settings).
￭

SMS function

The user does not need to make any additional wirings.
￭

SSM function

The user must wire the SSM indication signal of the FSO module according to the application
on site. See the table above and the circuit diagrams delivered with the drive for the terminal
designations.