JH4001I: RTD Input, Input/Output Isolated
Model JH4001I provides a DC output proportional to temperature as measured by a resistance thermometer (RTD). A fixed-range device, it is precisely calibrated to your specified range at the factory.
Three-wire input circuitry compensates for lead wire resistance. (A 4-wire input option is available.) When ordered for use with platinum RTDs, linearization is included. All other types are not linearized: output is proportional to the input resistance. Contact the factory for nonstandard requirements or for use with resistance inputs other than RTDs.
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 JH4001I-AC for AC power, JH4001I-DC for DC power.
Specify any standard RTD type between 10 and 2,000 ohms, or provide details for nonstandard RTD or resistance input.
Specify any range allowed by the "Input Capabilities" spec, below.
Specify any DC voltage or current range allowed by the "Output Capabilities" spec, below.
Specify Option 4-Wire
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"
INSTALLATION AND CONNECTIONS
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). Pin connections are:
Pin 1: Power (AC or, if DC power option, DC plus).
Pin 2: No connection. (If 4-wire, same end of RTD as Pin 6)
Pin 3: Power (AC or, if DC power option, DC minus).
Pin 4: RTD.
Pin 5: RTD compensation (same end of RTD as Pin 4).
Pin 6: RTD (opposite end from Pin 4).
Pin 7: Output plus.
Pin 8: Output minus.
Any RTD from 10 to 2,000 ohms. 3-wire connection (may also be connected as 2-wire. 4-wire option available). Contact factory for other types of resistance inputs..
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.
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 0.02 ohms, whichever is greater.
Zero and span each are adjustable approx. +/-15% of span.
Platinum inputs are linearized for RTD curve. All others are linear with input resistance.
Under 100 milliseconds.
Power, 1500Vac rms (2,100V peak). Input/Output 1000Vac rms (1,400V peak).
-10 to +60 deg. C (14 to 140 deg. F).
+/-0.02% of span per deg. C, or better.
AC, 115 or 230Vrms, 50/60Hz, 2.5V-A. DC, 12 or 24V, 2.5W.