YASKAWA Sigma-V Series User Manual page 204

(5) Connection Example and Specifications of Input Signals (HWBB Signals)
The input signals must be redundant. A connection example and specifications of input signals (HWBB sig-
nals) are shown below.
For safety function signal connections, the input signal is the 0 V common and the output
signal is the source output. This is opposite to other signals described in this manual. To
avoid confusion, the ON and OFF status of signals for safety functions are defined as fol-
lows:
ON: The state in which the relay contacts are closed or the transistor is ON and current
OFF: The state in which the relay contacts are open or the transistor is OFF and no cur-
Connection Example
24-V power
Use a switch
that has micro-current
contacts.
Specifications
Signal
Type
Name
/HWBB1
Input
/HWBB2
The input signals (HWBB signals) have the following electrical characteristics.
Items
Internal Impedance
Operation Movable Volt-
age Range
Maximum Delay Time
If the HWBB function is requested by turning OFF the /HWBB1 and /HWBB2 input signals on the two chan-
nels, the power supply to the servomotor will be turned OFF within 20 ms (see below).
/HWBB1
ON
/HWBB2
(Normal operation)
SERVOPACK
Normal operation
State
Note 1. The OFF status is not recognized if the total OFF time of the /HWBB1 and /HWBB2 signals is 0.5 ms or shorter.
2. The status of the input signals can be checked using monitor displays. Refer to 8.6 Monitoring Safety Input Sig-
nals.
flows into the signal line.
rent flows into the signal line.
supply
Switch
/HWBB1+ 4
Fuse
/HWBB1-
/HWBB2+
/HWBB2-
0 V
Connector
Setting
Pin Number
ON (closed)
CN8-4
CN8-3
OFF (open)
ON (closed)
CN8-6
CN8-5
OFF (open)
Characteristics
3.3 kΩ
+11 V to + 25 V
20 ms
Within 20 ms
SERVOPACK
CN8
3
6
5
Does not use the HWBB function. (normal operation)
Uses the HWBB function. (motor current shut-off
request)
Does not use the HWBB function. (normal operation)
Uses the HWBB function. (motor current shut-off
request)
−
−
Time from the /HWBB1 and /HWBB2 signals are OFF to
the HWBB function operates.
OFF (Motor current
shut-off request)
HWBB state
5.11 Safety Function
Meaning
Remarks
5
5-83