JH4130: Thermocouple Input, Input/Output Isolated
JH4130L: Linearized Thermocouple Input, Input/Output Isolated
Model JH4130 provide a DC voltage or current proportional to millivolts produced by a thermocouple. Model JH4130L adds linearization to compensate for thermocouple nonlinearity, producing an output truly proportional to temperature. Both are fixed-range devices, precisely calibrated to your specified ranges 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.
An internal jumper allows upscale or downscale indication upon thermocouple burnout (factory set for upscale unless otherwise specified on your order). Available options include AC or DC power choices and reverse-action Option RT (decreasing output with increasing input).
Select from the list above. Add suffix –AC for AC power or –DC for DC power.
Specify type J, K, T, E, R, S, B or N, or contact factory for others.
Specify any range corresponding to 4mV or higher span. (4mV equals 100 deg C for type K thermocouples.)
Specify upscale (offscale high) or downscale (offscale low) burnout indication. Will be set for upscale if not specified on your order.
Specify any DC voltage or current range allowed by the "Output Capabilities" spec, below.
Specify 115Vac, 230Vac, 12Vdc or 24Vdc.
4/20mA "current sink" output stage for connection to devices whose inputs provide 24Vdc loop excitation. Specify Option LPO.
Specify Option U
These transmitters plug into any standard 8-pin circular ("octal") relay socket. JH Technology offers a socket suitable for DIN-rail or surface mounting (see the Accessories page).
The thermocouple connects to a small terminal block (which also includes cold junction compensation) on the side of the module. The remaining 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: No connection.
Pin 5: No connection.
Pin 6: No connection.
Pin 7: Output plus.
Pin 8: Output minus.
Any input span 4mV or higher. Offset ranges are allowed.
Any standard thermocouple type (J, K, T, E, R, S, B, N). Others possible – contact factory.
Jumper-selectable upscale (offscale high) or downscale (offscale low). Factory set for upscale unless otherwise specified.
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 better (or, on narrow spans, +/-0.2 deg C or 20 microvolts, whichever is greater).
Zero and span each are adjustable approx. +/-15% of span.
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.