Omron B7A Manual page 104

B7A
Transmission Errors and Output Signals
Transmission errors occur in the following cases:
When the signal or 0-V wire is disconnected.
When the signal is influenced by high-level external noise or the
signal is excessively deformed because the length of the
transmission path is more than the permissible distance.
When the supply voltage to the Link Terminals are not within the
operating voltage range (12 to 24 V 10%).
Immediately after the Link Terminals are turned on.
(An error is reset within 300 ms after the power is turned on.)
I/O Status
Signal Configuration
Input Models
Type Applicable
model
Screw B7A-T6A1 For switches
terminals B7A-T6A6 ON: Switch is closed.
B7AM-6BS OFF: Switch is open.
B7AM-8B11
B7AM-8B31
B7AM-8B16
B7AM-8B36
B7A-T10S1
B7A-T10S3 For photoelectric sensors and proximity sensors (NPN)
ON: Sensor signal is ON (residual voltage is 1.6 V max.).
OFF: Sensor signal is OFF.
B7A-T6B1 For photoelectric sensors and proximity sensors (NPN)
B7AS-T6B1 ON: Sensor signal is ON (residual voltage is 4 V max.).
B7A-T6B6 OFF: Sensor signal is OFF.
B7AS-T6B6
B7AM-6BS
B7AM-8B11
B7AM-8B31
B7AM-8B16
B7AM-8B36
B7A-T6A1 For proximity sensors (two-wire sensor with DC output)
B7A-T6A6 ON: Sensor signal is ON (residual voltage is 4 V max.).
B7A/S-T6B1 OFF: Sensor signal is OFF (leakage current is 1.5 mA
B7A/S-T6B6 max.).
B7AM-6BS
B7AM-8B11
B7AM-8B31
B7AM-8B16
B7AM-8B36
B7A-T6C1 For switches
B7A-T6C6 ON: Switch is closed.
B7AM-8F31 OFF: Switch is open.
For proximity sensors (two-wire sensor with DC output)
ON: Sensor signal is ON (residual voltage is 4 V max.).
OFF: Sensor signal is OFF (leakage current is 1.5 mA
max.).
For photoelectric sensors and proximity sensors (PNP)
ON: Sensor signal is ON (residual voltage is 4 V max.).
OFF: Sensor signal is OFF.
102
Output Signals
HOLD: When an error occurs, the output signals just before the oc-
currence of the error will be maintained.
LOAD OFF: When an error occurs, all output signals will be turned
Automatic Reset
When the error is corrected, the Link Terminals will automatically re-
set themselves.
ON/OFF
OFF.
Circuit
IN
SW
_
+V
+
OUT
IN
Sensor
0 V
_
+V
+
OUT
IN
Sensor
0 V
_
+V
IN
Sensor
0 V
–
+
SW
IN
+V
+
Sensor
0 V
IN
+V
+
OUT
IN
Sensor
0 V
_
B7A
Suitable input
example
A3G Pushbutton
Switch (microload)
WL01j
Limit Switch
E2E-XjE
Proximity Sensor
E3S Photoelectric
sensor
E2E-XD-N 2-wire
DC Inductive
Proximity Sensor
A3G Pushbutton
Switch (microload)
WL01j Limit
Switch
E2E-XD-N 2-wire
DC Inductive
Proximity Sensor
E2E-XjF
Proximity Sensor
E3S Photoelectric
sensor (B-type)