Safe Torque Off
vacon • 88
9
9.5
Connections
To make the STO function available and ready to be used, both the STO jumpers have to be removed.
They are located in front of the STO inputs to mechanically prevent the insertion of the STO connec-
tor. For the correct configuration, see the following table and the Figure 65.
Figure 65. Removing the STO jumpers.
The following examples show the basic principles for wiring the STO inputs and the STO output
feedback. Local standards and regulations should be always followed in the final design.
Signal
Terminal
Technical information
Data
STO1
S1
Insulated digital input 1
(interchangeable polarity)
24V
10...15 mA
G1
STO2
S2
Insulated digital input 2
(interchangeable polarity)
24V
10...15 mA
G2
STO feed-
back
F+
Insulated digital output for STO
feedback
(CAUTION! Polarity must be
respected)
24V
15 mA max.
F-
GND
Table 31. STO connector and data signals.
Make sure that the frequency converter is switched off before cabling.
Disconnect both the STO jumpers to allow the cabling of the terminals.
When the STO function is used,
the IP-class of the drive may not be reduced below
IP54
. The IP-class of drive is IP66. It can be reduced by the wrong use of the cable
entry plates or the cable glands.
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]
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