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8.2
Functional safety I/O signal connector (CN8) and
pin assignments
Pin assignment
The pin assignments of the connectors are as viewed from the cable connector wiring section.
Functional safety I/O
signal connector
CN8
8
7
TOFB2
TOFCOM
5
6
STO2
TOFB1
3
4
STOCOM
STO1
1
2
Signal (device) explanation
I/O device
Signal
Connector pin
name
No.
STOCOM
CN8-3
STO1
CN8-4
STO2
CN8-5
TOFCOM
CN8-8
TOFB1
CN8-6
TOFB2
CN8-7
8 USING STO FUNCTION
142
8.2 Functional safety I/O signal connector (CN8) and pin assignments
Top view of
drive unit
Description
Common terminal for the STO1 and STO2 input signals
Input the STO status of STO1.
STO state (base circuit shut-off): Open between STO1 and STOCOM.
STO release state (in driving): Close between STO1 and STOCOM.
Before turning off STO1, stop the servo motor in the servo-off state or with forced stop deceleration by
turning off EM2 (Forced stop 2).
Input the STO status of STO2.
STO state (base circuit shut-off): Open between STO2 and STOCOM.
STO release state (in driving): Close between STO2 and STOCOM.
Before turning off STO2, stop the servo motor in the servo-off state or with forced stop deceleration by
turning off EM2 (Forced stop 2).
Common terminal for the TOFB1 and TOFB2 output signals
Outputs the STO status of STO1.
STO state (base circuit shut-off): Closed between TOFB1 and TOFCOM.
STO release state (in driving): Open between TOFB1 and TOFCOM.
Outputs the STO status of STO2.
STO state (base circuit shut-off): Closed between TOFB2 and TOFCOM.
STO release state (in driving): Open between TOFB2 and TOFCOM.
I/O signal
interface
type
DI-1
DI-1
DI-1
DO-1
DO-1
DO-1
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