Safe Torque Off Terminal Function Description - Delta VFD7A5MS23ANSHA User Manual

17-2

Safe Torque Off Terminal Function Description

As mentioned earlier STO (Safe torque off) related terminal functions are described in Table 1 below.
Terminals
When the STO function is
not used, the STO function
+24V
can be disabled by shorting
S1 and S2 with + 24V
Signal input of STO function
S1
channel 1
Signal input of STO function
S2
channel 2
Reference ground of S1
DCM
and S2 signal
Action logic and keypad display after S1/S2 signal input are described in Table 2 below.
Signal
S1~DCM
S2~DCM
Drive output
Error displayed on
keypad
 STO means channel 1 and 2 operate simultaneously and enter Safe Torque Off.
 STL1 means channel 1 operates.
 STL2 means channel 2 operates.
 STL3 means there is error detected in the internal circuit of channel 1 or channel 2.
 S1 DCM / S2
~
 S1~ DCM / S2
Chapter 17 Safe Torque Off FunctionMS300 (High Speed Model)
Terminal Function
Table 1: Terminal function description
ON
ON
Ready to output
No error displayed
Table 2: Description of action logic and keypad display
DCM ON: means S1~ DCM / S2
~
DCM OFF: means S1~ DCM / S2
~
Output voltage range: +24V ± 10 %
Output voltage capacity: 100 mA
S1~DCM / S2~DCM
Rated input voltage: +24 VDC ± 10 %; Max. input voltage: +30
VDC ± 10 %
Rated input current: 6.67 mA ± 10 %
STO activation mode
Input voltage level: 0 VDC < S1~DCM and S2~DCM < 5 VDC
STO response time: ≤ 20 ms (time required for S1/S2 operate
till the drive stop outputting)
STO cut-off mode
Input voltage level: 11 VDC < S1~DCM and S2~DCM < 30 VDC
Status
ON
OFF
STL2 mode
(Torque output off) (Torque output off)
STL2
DCM inputs a power supply > 11 VDC.
~
DCM inputs a power supply < 5 VDC.
~
17-3
Specifications
OFF
ON
STL1 mode STO mode
(Torque output off)
STL1
OFF
OFF
STO