Invertek Optidrive P2 series Installation & Operating Instructions Manual page 25

4.10.7.1. Recommended "STO" wiring
Using an External 24Vdc Power Supply.
Safety relay
External
+24Vdc
Power
0V
Supply
1 2 3 4 5 6 7 8 9 10 11 12 13
External
+24Vdc
Power
Supply
Note : The Maximum cable length from Voltage source to the drive terminals should not exceed 25 mtrs.
4.10.8. External Power supply Specification.
Voltage Rating (Nominal)
STO Logic High
Current Consumption (Maximum)
4.10.9. Safety Relay Specification.
The safety relay should be chosen so that at minimum it meets the safety standards in which the drive meets.
Standard Requirements
Number of Output Contacts
Switching Voltage Rating
Switching Current
4.10.10. Enabling the "STO" Function
The "STO" function is always enabled in the drive regardless of operating mode or parameter changes made by the user
4.10.1. Testing the "STO" Function
Before commissioning the system the "STO" function should always be tested for correct operation, this should include the following tests:

With the motor at standstill, and a stop command given to the drive (as per the start source method selected in P1-13):
o
De-energise the "STO" inputs (Drive will display ""InHibit").
o
Give a start command (as per the start source method selected in P1-13) and check that the drive still displays "Inhibit" and
that the operation is in line with the section 4.10.4 "STO" Operation and section 4.10.5"STO" Status and Monitoring

With the motor running normally (from the drive):
o
De-energise the "STO" inputs
o
Check that the drive displays "InHibit" and that the motor stops and that the operation is in line with the section and
section 4.10.4 "STO" Operation and section 4.10.5"STO" Status and Monitoring
Optidrive ODP-2 User Guide Revision 2.10
Protective Capped Trunking
or equivalent to prevent
STO Cable short circuit to an
external Voltage source.
- Twisted-Pair
- Shielded cables
Safety relay
0V
24Vdc
18-30Vdc (Safe torque off in standby)
100mA
SIL2 or PLd SC3 or better (With Forcibly guided Contacts)
2 independent
30Vdc
100mA
www.invertekdrives.com
Using the drives on-board 24Vdc supply
Protective Capped Trunking
or equivalent to prevent
STO Cable short circuit to an
external Voltage source.
Safety
1213
relay
1 2 3 4 5 6 7 8 9 10 11 12 13
Wires should be
protected
against short
circuits as
shown above
1 7 1213
Protected
shielded cables
Safety relay
.
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