9.4 Alarm Signal Output (Alarm Output)
134
This signal is output when alarm criteria are satisfied. Specify the desired alarm criteria.
See:
9.4 Alarm Signal Output (Alarm Output)
Alarm signal output
(ALARM)
When alarm criteria are satisfied
About the Alarm Output Signal
Output signal
Open-drain output (with voltage output), active LOW
Output voltage range
HIGH level: 4.0 to 5.0 V, LOW level: 0 to 0.5 V
Output Refresh
Every recording interval
Maximum input voltage
30 V DC, 5 mA max, 200 mW max
GND
ALARM
10 k
5 V
For the connection
method (p. 130)
Connect the ALARM (No. 4) and GND (No. 1) terminals of the
external control terminal block to the signal output line and
ground, respectively. When the alarm criteria are satisfied, a
Low level (0 to 0.5V) signal is output.
The ALARM pin implements active-low operation. In the example connection, current flows to the
coil when there is no alarm output. Choose a relay with a contact architecture that implements the
desired operation.
Relay
FET, etc.
GND
GND
ALARM
10 k
5 V DC
Instrument
DC power supply
(Provide a DC power supply that accom-
modates the relay coil's rated voltage.)
ALARM pin circuit architecture and example relay connection
Содержание LR8431
Страница 1: ...EN LR8431 20 MEMORY HiLOGGER Instruction Manual Aug 2015 Revised edition 3 LR8431B980 03 15 08H...
Страница 2: ......
Страница 20: ...Operating Precautions 12...
Страница 44: ...2 5 Zero Adjustment 36...
Страница 74: ...3 7 Viewing All Channel Settings in a List 66...
Страница 88: ...4 5 About Recording Operation 80...
Страница 120: ...6 6 Transferring Data to a Computer USB Drive Mode 112...
Страница 126: ...7 2 Numerical Value Calculation Expressions 118...
Страница 136: ...8 3 Making System Settings 128...
Страница 144: ...9 5 Synchronous Measurements with Multiple Instruments 136...
Страница 154: ...Chapter 10 Specifications 146...
Страница 198: ...Appendix 11 Pulse Input Circuit Diagram A40...
Страница 202: ...Index Index 4...
Страница 203: ......
Страница 204: ...EN LR8431 20 MEMORY HiLOGGER Instruction Manual Aug 2015 Revised edition 3 LR8431B980 03 15 08H...