Version 3.05
| Optidrive Eco User Guide |
29
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4.11.7. Recommended “STO” Wiring
Using an External 24Vdc Power Supply
Using the drives on-board 24Vdc supply
- Twisted-Pair
- Shielded cables
1213
1213
Protective Capped Trunking
or equivalent to prevent
STO Cable short circuit to an
external Voltage source
.
1
7
Safety relay
Protective Capped Trunking
or equivalent to prevent
STO Cable short circuit to an
external Voltage source
.
Safety
relay
Protected
shielded cables
0V
+24Vdc
External
Power
Supply
- Twisted-Pair
- Shielded cables
1213
1213
Protective Capped Trunking
or equivalent to prevent
STO Cable short circuit to an
external Voltage source
.
1
7
Safety relay
Protective Capped Trunking
or equivalent to prevent
STO Cable short circuit to an
external Voltage source
.
Safety
relay
Protected
shielded cables
0V
+24Vdc
External
Power
Supply
Wires should be
protected against
short circuits as shown
above
NOTE
The Maximum cable length from Voltage source to the drive terminals should not exceed 25 metres.
4.11.8. External Power Supply Specification
Voltage Rating (Nominal)
24Vdc
STO Logic High
18-30Vdc (Safe torque off in standby)
Current Consumption (Maximum)
100mA
4.11.9. External Power Supply Specification
The safety relay should be chosen so that at minimum it meets the safety standards in which the drive meets.
Standard Requirements
SIL2 or PLd SC3 or better (With Forcibly guided Contacts)
Number of Output Contacts
2 independent
Switching Voltage Rating
30Vdc
Switching Current
100mA
4
Elec
trical Installation