JH4051I: Strain Gauge Input, Input/Output Isolated
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).
Select JH4051I-AC for AC power, JH4051I-DC for DC power.
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.)
Specify any DC voltage or current range allowed by the "Output Capabilities" spec, below.
Specify 115Vac, 230Vac, 12Vdc or 24Vdc.
Specify Option RT.
4/20mA "current sink" output stage for connection to devices whose inputs provide 24Vdc loop excitation. Specify Option LPO.
Specify Option U
The JH4051I plugs into any standard 11-pin circular ("octal") relay socket. JH Technology offers a socket suitable for DIN-rail or surface 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.
4mV minimum span (0.4mV/V at 10V excitation). 10V maximum span (1V/V at 10V excitation). Offset ranges are allowed.
(Input Impedance: 200kohms.)
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.)
1 volt minimum output span, -10 to +15V absolute limit. Offset ranges are allowed. Maximum output load, 10mA (1Kohm at 10V output).
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).
+/-0.1% of span or 10 microvolts, whichever is greater.
Zero and span each are adjustable approx. +/-15% of span.
+/-0.05% of span or better.
Under 100 milliseconds.
Power, 1,500Vac rms (2,100V peak). Input/Output, 1,000Vac rms (1,400V peak).
-10 to +60 deg. C (14 to 140 deg. F).
+/-(0.02% of span plus 1.3 microvolts) per deg. C, or better.
AC, 115 or 230Vrms, 50/60Hz, 2.5V-A. DC, 12 or 24V, 2.5W.