Download 4 - Suport

(1) The list of the conditions to detect disconnection (no connection) or a shortcircuit (ground) of a sensor power supply
The locations where the detection is possible (1) to 9)) and the detection conditions are shown below.
(a) AJ65ABTP3-16D
AJ65ABTP3-16D
Input device
3)
COM+
COM+
9) 8)
7)
External
power
supply
Internal
control
circuit
1)
Xn
Detection
circuit
6) 5)
2)
Short-circuit
detection
circuit
-Cn
4)
COM-
FG: Device frame
Disconnection
Connected
Condition
device
2-wire input
device
3-wire input
device
Xn
-Cn
COM+
-CnFG
Xn-Cn
XnFG
-CnCOM+
XnCOM+
COM+FG
1)
2)
3)
4)
5)
6)
7)
8)
9)
*2
×
*2*3*4
-
-
-
*2
×
*2*3*4
*3*4
×
Leakage current
(higher than 0.3mA)
Leakage current
(0.3mA or lower)
Holding current
(higher than 0.3mA)
Holding current
(0.3mA or lower)
Short-circuit (ground)
(no connection)
*1
*1
-
×
×
*1
*1
: Detection is possible,
*1
*2
*3
*4
: Detection is possible depending on conditions, ×: Detection is not possible
Bleeder resistances must be connected in parallel just proximal to the input device. (Allowable bleeder resistance: 56k)
The positive common (COM+) of the external power supply must be connected to the device frame.
The detection is possible when the connected input device is turned on.
For some input devices, the short-circuit cannot be detected because the short-circuit current does not flow due to the
short-circuit protection function.
If a short-circuit occurs, remove the cause immediately. If the short-circuit remains, the internal temperature of the module
rises, resulting in malfunction or failure.
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