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JH1400: RTD Input Single Trip Alarm
JH1420: RTD Input Dual Trip Alarm
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3-Wire
Lead Resistance Compensation
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Platinum,
Nickel and other RTDs
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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 JH1400 and JH1420 RTD Input Alarms monitor temperature as
measured by a resistance thermometer (RTD) and provide relay contact
HI/LO trip outputs. Both are fixed-range devices, with input ranges
preset per your order. These alarms also may be ordered with setups
to monitor resistances other than RTDs
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 JH1400
provides one set of DPDT relay contacts; Model JH1420, two SPDT
relays. Three-wire input circuitry compensates for lead wire
resistance. AC and DC power options are available.
ORDERING INFORMATION
| Model
Number: |
Select JH1400
single-trip alarm or JH1420 dual-trip alarm. Add suffix
–AC for AC power or –DC for DC power. |
| RTD: |
Specify any
standard RTD type between 10 and 2,000 ohms, or provide
details for nonstandard RTD or resistance input. |
| Input
Range: |
Specify any
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: RTD.
Pin 3: Power (AC or, if DC power
option, DC minus).
Pin 4: RTD (opposite end from Pins 2
and 5).
Pin 5: RTD compensation (same end of
RTD as pin 2).
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.
DETAILED SPECIFICATIONS
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RTD Type:
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Any RTD from 10 to 2,000 ohms. 3-wire
connection (can also be connected as 2-wire). Specify RTD
type, slope and resistance, or provide details for
nonstandard RTD. Contact us
for other types of resistance inputs.
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Input
Capabilities:
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Minimum span 10 deg C (18 deg
F) or 1 ohm, whichever is greater. Any range up to maximum
covered by RTD. Offset ranges are allowed. |
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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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