2.4. Safe Torque Off Input (STO)
The STO circuit is comprised of two identical channels, each of which must be energized in order for the
XC4 to produce motion. Each STO input is opto-isolated and accepts 24V levels directly without the need
for external current limiting resistors.
IMPORTANT
: The XC4 might be equipped with an STO bypass circuit board. The bypass
circuit board defeats the STO safety circuit and allows the system to run at all times. To use
the STO safety functionality, remove the circuit board and make connections as outlined in
this section.
IMPORTANT
: The application circuit and its suitability for the desired safety level is the
sole responsibility of the user of the XC4.
WARNING
: STO wires must be insulated to prevent short circuits between connector pins.
The primary concern is a short circuit between STO 1 IN and STO 2 IN wire strands.
Table 2-25:
STO Connector Pinout
Pin # Signal
Description
In/Out/Bi
Connector
1
Power
Used to defeat STO by connecting to STO 1 IN
and STO 2 IN
N/A
2
STO 1 IN
STO Channel 1 Positive Input
Input
3
RETURN
STO Negative Input
Input
4
STO 2 IN
STO Channel 2 Positive Input
Input
5
Power Supply -
Used to defeat STO by connecting to RETURN
N/A
Table 2-26:
Mating Connector Part Numbers for the STO Connector
Description
Aerotech
P/N
Phoenix
P/N
Tightening
Torque
(Nm)
Wire Size:
AWG [mm
2
]
5-Pin Terminal Block
ECK02393
1827622
0.22 - 0.25
2.5 - 0.05 [14-30]
2.4. Safe Torque Off Input (STO)
XC4 Hardware Manual
60
www.aerotech.com
Содержание Automation1 XC4
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Страница 24: ...Figure 1 4 Dimensions EB1 1 2 2 Dimensions XC4 Hardware Manual 24 www aerotech com...
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Страница 92: ...Figure 3 2 Digital Outputs Schematic EB1 3 1 Digital Outputs EB1 XC4 Hardware Manual 92 www aerotech com...
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