Emission Halt Input Terminals - Panasonic ST4 Instruction Manual

Before Using this Device

2.5.2.4 Emission Halt Input Terminals

The internal circuits of the emission halt input terminals (T1 and T2) as well as the override input
terminals (O1 and O2) are switched by the output polarity selection switch.
Controller ST4-C11
PNP output
1
3kΩ
T1 T2
= Main circuit
1
Controller ST4-C12EX
PNP output
1
3kΩ 3kΩ
T1 T2
= Main circuit
1
Output waveform (control output OSSD 1/2 ON)
Since the controller performs a self-diagnosis of the output circuit when the sensor is in light
receiving status (ON), the output transistor periodically turns OFF (see following figure). If the
preceding OFF signal is received by the controller the output circuit is judged as normal. If the
OFF signal is not received, the controller judges either the output circuit or wiring as faulty, and
the control output (OSSD 1/2) switches OFF.
CAUTION
Since the OFF signal of this device might cause malfunction, ensure that the
input response time of the machine corresponds to the requirements of this
device.
ON
OSSD 1
OFF
ON
OSSD 2
OFF
30 - 50μs
The values in the preceding picture are approximate values.
40
SEN TRONIC
AG
Produkte, Support und Service
NPN output
3kΩ
T1 T2
NPN output
1
3kΩ
O1 O2 T1 T2
11ms
50 - 100μs
30 - 50μs
120μs
Rugghölzli 2
CH - 5453 Busslingen
Panasonic ST4 Instruction Manual
1
3kΩ
O1 O2
30 - 50μs
120μs
50 - 100μs
Tel. +41 (0)56 222 38 18
Fax +41 (0)56 222 10 12
30 - 50μs
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