4.3 Connecting the HWBB Function Signal
4.3.2 I/O Circuits
4-9
4
Wiring and Connecting
S
ER
VOP
ACK
s
Input (HWBB) Signal Specifications
The input (HWBB) signals have the following electrical characteristics.
Diagnostic Output Circuits
The EDM1 output signal uses a source circuit. The following figure shows a connection exam-
ple.
EDM1 Output Signal Specifications
The electrical characteristics of the EDM1 signal are as follows:
Type
Signal
Connector
Pin No.
Status
Meaning
Inputs
/HWBB1
CN8-4
CN8-3
ON (closed)
Does not activate the HWBB function (normal
operation).
OFF (open)
Activates the HWBB function (motor current shut-
OFF request).
/HWBB2
CN8-6
CN8-5
ON (closed)
Does not activate the HWBB function (normal
operation).
OFF (open)
Activates the HWBB function (motor current shut-
OFF request).
Item
Characteristics
Remarks
Internal Imped-
ance
4.7 k
Ω
−
Operating Voltage
Range
+24 V
±
20%
−
Maximum Delay
Time
8 ms
Time from /HWBB1 and /HWBB2 signals turning
OFF until HWBB function is activated
Type
Signal
Pin No.
Output Sta-
tus
Meaning
Output
EDM1
CN8-8
CN8-7
ON
Both the /HWBB1 and /HWBB2 signals are operat-
ing normally.
OFF
The /HWBB1 signal, the /HWBB2 signal, or both
are not operating.
Item
Character-
istics
Remarks
Maximum Allow-
able Voltage
30 VDC
−
Maximum Allow-
able Current
50 mA DC
−
Maximum ON
Voltage Drop
1.0 V
Voltage between EDM1+ and EDM1- when current is 50
mA
Maximum Delay
Time
8 ms
Time from a change in /HWBB1 or /HWBB2 until a change
in EDM1
24-V power
s
upply
S
ERVOPACK
Ho
s
t controller
EDM1+
EDM1-
0 V
8
7
CN8
