JH4001I: RTD Input, Input/Output Isolated
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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).
ORDERING INFORMATION
Model Number: |
Select JH4001I-AC for AC power, JH4001I-DC for DC power. |
RTD: |
Specify any standard RTD type between 10 and 2,000 ohms, or provide details for nonstandard RTD or resistance input. |
Input Range: |
Specify any range allowed by the "Input Capabilities" spec, below. |
Output Range: |
Specify any DC voltage or current range allowed by the "Output Capabilities" spec, below. |
4-Wire RTD: |
Specify Option 4-Wire |
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. |
Urethane Coating: |
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.
DETAILED SPECIFICATIONS
RTD Type: |
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.. |
Input Capabilities: |
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. |
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 0.02 ohms, whichever is greater. |
Adjustability: |
Zero and span each are adjustable approx. +/-15% of span. |
Linearization: |
Platinum inputs are linearized for RTD curve. All others are linear with input resistance. |
Response Time: |
Under 100 milliseconds. |
Isolation: |
Power, 1500Vac rms (2,100V peak). Input/Output 1000Vac rms (1,400V peak). |
Guaranteed Operating Temperature: |
-10 to +60 deg. C (14 to 140 deg. F). |
Temperature Stability: |
+/-0.02% of span per deg. C, or better. |
Power Requirements: |
AC, 115 or 230Vrms, 50/60Hz, 2.5V-A. DC, 12 or 24V, 2.5W. |