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JH Technology's plug-in
alarm modules monitor standard DC, AC or transducer signals and
provide relay contact closure outputs. Their 5 amp, 230Vac contacts
may be used to actuate alarms, to turn heaters, valves etc. on and
off or to signal events to annunciator, datalogger or programmable
logic control (PLC) systems. Plug-and-play socket installation lets
you remove and replace alarms without rewiring. These modules often
provide low-cost alternatives to other monitoring systems.
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Available models accept inputs from most
standard transducers as well as low- or high-level voltage and
current sources. Computational models also are available. Single and
dual trip alarms are offered. Top-accessible switches allow easy
selection of HI or LO (or HI-HI, HI-LO, LO-LO) trip function.
Adjustable deadband is standard on both single and dual trip models.
Red/green alarm status LEDs are visible through the tops of the
units. AC and DC power options are available.
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Selection Guide
Single Input
Source |
Single
Trip
Alarm
Output |
Dual
Trip
Alarm
Outputs |
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| AC Current (average): 1mA to 5A span |
JH1600 |
JH1620 |
| AC Current (true RMS): 1mA to 5A span |
JH1600R |
JH1620R |
| AC Voltage (average): 50mV to 250V
span |
JH1600 |
JH1620 |
| AC Voltage (true RMS): 50mV to 250V
span |
JH1600R |
JH1620R |
| DC Current: 1mA- 5000mA |
JH1000 |
JH1020 |
| DC Current: 4-20mA w/Loop Excitation |
JH1005 |
JH1025 |
| DC Voltage: +/- 250VDC, 4mV min span |
JH1000 |
JH1020 |
| Potentiometer: 100 to 100K Ohms |
JH1800 |
JH1820 |
| RTD: 100 Ohm and others |
JH1400 |
JH1420 |
| Thermocouple: E, J, K, T, R, S, B or
N |
JH1200 |
JH1220 |
| Strain Gauge: Resistance Bridge |
JH1500 |
JH1520 |
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| Multi-Input Signal
Conditioners |
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| Adder 2-Input, Voltage or Current |
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| Adder 3-Input, Voltage or Current |
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| Adder 4-Input, Voltage or Current |
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| Subtract 2-Input, Voltage or Current |
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| Multiply 2-Input, Voltage or Current |
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| Divide 2-Input, Voltage or Current |
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