STRAIN GAUGE (BRIDGE) INPUT TRANSMITTERS
PLUG-IN MODULE, FIXED RANGE

JH4051I: Strain Gauge Input, Input/Output Isolated

    • Input Spans as low as 0.4mV/V (at 10V excitation)
    • Excitation Adjustable from 4 to 12V
    • Quick-Check Red/Green Output LEDs
    • Uses Standard 11-Pin Socket
    • Nonstandard Ranges Available
    • AC or DC Power Options

     

    JH4051I
    PDF
    DATA SHEET

Model JH4051I supplies DC excitation to a strain gauge or other resistance bridge, amplifies the bridge output and provides a proportional DC voltage or current. A fixed-range device, it is precisely calibrated to your specified range at the factory. 

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.

Available options include AC or DC power choices and reverse-action Option RT (decreasing output with increasing input).

ORDERING INFORMATION

Model Number: 

Select JH4051I-AC for AC power, JH4051I-DC for DC power.
Bridge Excitation: 

Specify any voltage between 4 and 12Vdc. Will be factory set to 10V if not specified on your order. User-adjustable. (Note: 40mA maximum load. For 120ohm bridges, specify 4.8V or less.)
Input Range:  Specify any input range allowed by the "Input Capabilities" spec, below. Specify either as millivolts per volt, or as millivolts. (Millivolts equals millivolts-per-volt multiplied by the excitation voltage. For example, 0-2.0 mV/V at 10V excitation equals 0-20mV.)
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.
Loop-Powered Output: 

4/20mA "current sink" output stage for connection to devices whose inputs provide 24Vdc loop excitation. Specify Option LPO.

INSTALLATION AND CONNECTIONS

The JH4051I plugs 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: No connection.
Pin 3: Power (AC or, if DC power option, DC minus).
Pin 4: Input plus (bridge output).
Pin 5: Input minus (bridge output).
Pin 6:  No Connection 
Pin 7: Bridge excitation plus.
Pin 8: Bridge excitation minus.
Pin 9: Output plus.
Pin 10: Output minus.
Pin 11: No connection.

DETAILED SPECIFICATIONS

Input Capabilities:

4mV minimum span (0.4mV/V at 10V excitation). 10V maximum span (1V/V at 10V excitation). Offset ranges are allowed.
(Input Impedance: 200kohms.)
Excitation Voltage:  

Adjustable from 4 to 12Vdc. 40mA maximum load. Factory set to 10Vdc unless otherwise specified. (Note: 120 ohm bridges limited to 4.8V or less. 350 ohm bridges are ok to 12V.)
Voltage Output Capabilities:  

1 volt minimum output span, -10 to +15V absolute limit. Offset ranges are allowed. Maximum output load, 10mA (1Kohm at 10V output).
Current Output Capabilities:  

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).
Accuracy (factory calibration):  

+/-0.1% of span or 10 microvolts, whichever is greater.
Adjustability:  

Zero and span each are adjustable approx. +/-15% of span.
Linearity:  

+/-0.05% of span or better.
Response Time:  

Under 100 milliseconds.
Isolation:  

Power, 1,500Vac rms (2,100V peak). Input/Output, 1,000Vac rms (1,400V peak).
Guaranteed Operating Temperature:  

-10 to +60 deg. C (14 to 140 deg. F).
Temperature Stability:  

+/-(0.02% of span plus 1.3 microvolts) per deg. C, or better.
Power Requirements:  

AC, 115 or 230Vrms, 50/60Hz, 2.5V-A. DC, 12 or 24V, 2.5W.

 

 
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