Eaton PowerXL DA1 Series Installation Manual page 75

2.10.4.1 STO installation with internal DA1 supply voltage (24 V DC)
￫
In addition to the wiring guidelines for an installation meeting
EMC requirements (￫ section 3.5, "EMC installation",
page 91), the following requirements must be observed as well
for the "STO wiring":
•
•
1 2 3 4 5 6 7 8 9 10 11 12 13
2 x
PES
eks
Safety relay
Figure 40: STO installation with internal control voltage
The connecting cable from control signal terminal 1 (+24 V) to the safety
relay's contact and the connecting cable from the safety relay's contact to
control signal terminal 12 (STO+) must be wired individually and installed
separately (eks, separate mechanical protection with two closed cable ducts
or two conduits). These two separately wired single cables must be
screened, and the corresponding cable screen must be earthed (PES).
DA1 Variable Frequency Drives 08/18 MN04020005Z-EN www.eaton.com
The STO-compatible installation must be protected against
short-circuits and tampering. The cables in the STO circuit
can be mechanically protected with a closed cable duct or
with a conduit (eks = ground and short-circuit-safe
installation).
The 24-V-DC power supply of the STO inputs can occur
from the internal 24-V-DC voltage of the DA1 variable
frequency drive or from an external 24-V-DC power source
(External Power Supply).
The DA1 variable frequency drive should be wired as
described below.
2 x
PES
eks
2.10 STO function
Control signal terminals
1: 24 V DC, output, max. 100 mA
7 or 9: 0 V
12: STO+, logical high signal,
input = 18 - 30 V DC
from the safety controller
13: STO-, 0-V connection to internal control
voltage (terminal 7 or 9)
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