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JH1005: DC Current Single Trip Alarm w/Loop
Excitation
JH1025: DC Current Dual Trip Alarm w/Loop Excitation
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4/20mA
Input Typical, Others Available
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Provides
24V Power to Input Loop
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Switch-Selectable
HI/LO Trip Function
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Adjustable
Deadband Standard
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Quick-Check
Red/Green Output LEDs
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Industry-Standard
Pinouts (11-Pin Socket)
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AC
or DC Power Options
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Models JH1005 and JH1025 provide 24Vdc loop excitation for a
remote 2-wire transmitter, take the signal from that transmitter and
provide relay contact HI/LO trip outputs. They also may be used with
DC-powered "3-wire" sensors and transmitters whose supply
currents do not exceed 25mA.
The alarm trip points are adjustable anywhere within the input
range. Deadbands also are fully adjustable, from 0.25% to 100% of
span. A slide switch, accessible through the top of the enclosure,
selects HI or LO trip operation (on dual alarms, HI/HI, HI/LO or
LO/LO). Red/green LEDs indicate alarm status.
Alarm contacts are rated at 5 amps, 230Vac or 30Vdc. Model JH1005
provides one set of DPDT relay contacts; Model JH1025, two SPDT
relays. AC and DC power options are available.
ORDERING INFORMATION
| Model
Number: |
Select JH1005
single-trip alarm or JH1025 dual-trip alarm. Add suffix –AC
for AC power or –DC for DC power. |
| Input
Range: |
Select 4/20mA for
use with 2-wire inputs, or any other range allowed by the
"Input Capabilities" spec, below. |
| Trip
Points: |
If you would like the trip points to be factory set,
please specify the following for each trip point. Specify HI
or LO trip, specify the setpoint and specify the amount of
deadband required (or specify "minimum deadband").
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| Power:
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Specify 115Vac, 230Vac, 12Vdc or 24Vdc.
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| Relay
Action: |
Standard is Failsafe - the relay is energized under normal
conditions and de-energizes upon alarm or upon loss of power.
Thus, loss of power is seen as an alarm condition. Or specify
Option R (Reverse Acting) – relay is normally not energized
and energizes (pulls in) upon alarm trip. Failsafe is provided
if not specified.
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INSTALLATION AND CONNECTIONS
These alarms plug into any standard 11-pin
circular ("octal") relay socket. JH Technology offers two
sockets: DS011 for DIN-rail or surface mounting and ST011 for
Snap-Track® mounting (see the Accessories
page).
Pin connections are:
Pin 1: Power (AC or, if DC power
option, DC plus).
Pin 2: 24Vdc power to input
transmitter. **
Pin 3: Power (AC or, if DC power
option, DC minus).
Pin 4: Signal input plus.***
Pin 5: Signal input minus.
Pin 6: Setpoint 1 relay NO contact.*
Pin 7: Setpoint 1 relay moving
contact.*
Pin 8: Setpoint 1 relay NC contact.*
Pin 9: Setpoint 2 relay NO contact.*
Pin 10: Setpoint 2 relay moving
contact.*
Pin 11: Setpoint 2 relay NC contact.*
(*) Note: NO (normally open) and NC (normally
closed) refer to the relay state when no power is applied. For
Failsafe operation the NO contacts are closed under non-alarm
conditions. The NC contacts close upon alarm and upon loss of
power. The terms Setpoint 1 and Setpoint 2 refer to dual-trip
alarms. For single-trip alarms, both sets of contacts respond to
the one trip point.
(**) Note: For 2-wire loop, connect to the
transmitter’s plus output terminal. For 3-wire transmitter,
connect to transmitter’s plus power terminal.
(***) Note: For 2-wire loop, connect to the
transmitter’s minus output terminal. For 3-wire transmitter,
connect to the transmitter’s plus output terminal.
DETAILED SPECIFICATIONS
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Voltage Input
Capabilities:
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50mV minimum span, +/-20V maximum
input. Offset ranges are allowed. (Input Impedance:
200Kohms or greater.)
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Current Input
Capabilities:
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1mA minimum span, +/-25mA
maximum input. Offset ranges are allowed. (Input
Resistance: Varies with input range. Contact factory for
details. 62 ohms for 4/20mA input.) |
| Input
Excitation: |
24Vdc regulated. 25mA max.
current. |
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Relay
Contacts:
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Single Alarm, one DPDT relay. Dual
Alarm, two SPDT relays. Contacts rated 5 Amps resistive,
115/230Vac or 30Vdc. 1/8 HP max inductive load at
115/230Vac. Refer to instructions for contact protection
when switching inductive loads.
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Setpoint
Adjustment:
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0% to 100% of range.
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Deadband
Adjustment:
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0.25% to 100% of range.
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Response
Time:
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Under 100 milliseconds.
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Isolation:
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Power, 1,500Vac rms (2,100V peak).
Input/Output, 1,000Vac rms (1,400V peak).
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Guaranteed
Operating Temperature:
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-10 to +60 deg. C (14 to 140 deg. F).
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Temperature
Stability:
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+/-0.02% of span per deg. C, or
better.
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Power
Requirements:
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AC, 115 or 230Vrms, 50/60Hz, 2.5V-A.
DC, 12 or 24V, 2.5W.
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