Eaton PowerXL DA1 Series Installation Manual page 76

2 Engineering
2.10 STO function
2.10.4.2 STO installation with external DA1 supply voltage (24 V DC)
1 2 3 4 5 6 7 8 9 10 11 12 13
Figure 41: STO installation with external control voltage
72
PES
eks
Safety relay
+24 V DC 0 V
100 mA
External Power
Supply
Both of the connecting cables, from the external power supply and the
safety relay, to the control signal terminals 12 (STO+) and 13 (STO-) must be
twisted cables.
These twisted cables must be installed in an enclosed cable duct or
installation pipe (eks) and shielded and the shielding braid must be grounded
(PES).
The external control voltage should meet the following specifications:
Rated control voltage
Voltage for the logical STO high signal
Current carrying capacity
DA1 Variable Frequency Drives 08/18 MN04020005Z-EN www.eaton.com
Control signal terminals
12:
13:
PES
eks
24 V DC
18 - 30 V DC
100 mA
STO+, logical high signal,
input = 18 - 30 V DC
STO-, 0-V connection to internal control
voltage (terminal 7 or 9)