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JH4305: DC Input , Isolated Module,
with Loop Supply
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4/20mA
Input Typical, Others Available
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Provides
24V Power to Input Loop
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Quick-Check
Red/Green Output LEDs
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Industry
Standard 8-Pin Socket Mounting
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AC
or DC Power Options
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Model JH4305 provides 24Vdc loop excitation for a remote 2-wire
transmitter, takes the signal from that transmitter and provides a
proportional DC voltage or current output. It also may be used with
DC-powered "3-wire" sensors and transmitters whose supply
currents do not exceed 25mA. Input/output isolation overcomes the
ground loop problems sometimes encountered with nonisolated
DC-powered transmitters.
Red-green Quick-Check LEDs give a quick indication of the
relative output. Red is brighter at the low end, green at high,
while at mid-scale both are approximately equal. Red-only indicates
offscale low while green-only indicates offscale high.
The JH4305 is a fixed-range device, precisely calibrated at the
factory. AC and DC power choices are available.
ORDERING INFORMATION
| Model
Number: |
Select
JH4305-AC for AC power, JH4305-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. |
| Output
Range: |
Specify any
DC voltage or current range allowed by the "Output
Capabilities" spec, below. |
| Power:
|
Specify 115Vac, 230Vac, 12Vdc or 24Vdc.
|
Reverse-Acting
Transmitter
(decreasing output with increasing input): |
Specify option RT
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| Loop-Powered
Output: |
4/20 mA "current sink" output stage for
connection to devices whose inputs provide 24 Vdc loop
excitation. Specify Option LPO.
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INSTALLATION AND CONNECTIONS
These transmitters plug into any standard 8-pin
circular ("octal") relay socket. JH Technology offers two
sockets: DS008 for DIN-rail or surface mounting and ST008 for
Snap-Track mounting.
Pin connections are:
Pin 1: Power (AC or, if DC power
option, DC plus).
Pin 2: No connection.
Pin 3: Power (AC or, if DC power
option, DC minus).
Pin 4: +24Vdc power to input
transmitter (see note 1 below)
Pin 5: Input plus (see note 2 below).
Pin 6: Input common (see note 3 below).
Pin 7: Output Signal plus (+).
Pin 8: Output Signal minus (-).
Note 1: For 2-wire loop, connect to transmitter’s
plus output terminal. For 3-wire transmitter, connect to transmitter’s
plus power terminal
Note 2: For 2-wire loop, connect to transmitter’s minus output
terminal. For 3-wire transmitter, connect to transmitter’s plus
output terminal.
Note 3: Not used with 2-wire loop. For 3-wire transmitter, connect
to transmitter’s minus (common) terminal.
DETAILED SPECIFICATIONS
| Input
Voltage Range: |
50mV minimum
span, +/-20V maximum input. Offset ranges are allowed.
(Input Impedance: 200kohms or greater.) |
|
Input Current
Range:
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1mA minimum span, +/-25mA maximum
input. Specify 4/20mA when used with a 2-wire transmitter.
Offset ranges are allowed. (Input Resistance: Varies with
input range. Contact factory for details. 62 ohms for
4/20mA input.)
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Loop
Excitation
Supply:
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24Vdc regulated. 25mA max. current
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Voltage
Output Capabilities:
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1 volt minimum output span, -10 to
+15V absolute limit. Offset ranges are allowed. Maximum
output load, 10mA (1Kohm at 10V output).
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Current
Output Capabilities:
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1mA minimum output span, 0 to +25mA
absolute limit. Positive offsets are allowed, negative
outputs are not. Output drive capability, 24V (1,200 ohms
max. at 20mA output).
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Accuracy
(factory calibration):
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+/-0.1% of span
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Adjustability:
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Zero and span each are adjustable
approx. +/-15% of span.
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Linearity:
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+/-0.05% of span or better.
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Response
Time:
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Under 100 milliseconds.
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Isolation:
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3-way (Power/Input/Output) 1,500Vac
rms (2,100V 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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