RTD (RESISTANCE THERMOMETER) INPUT TRANSMITTERS
PLUG-IN MODULES, FIXED RANGE
JH4001: RTD Input, Nonisolated
JH4001I: RTD Input, Input/Output Isolated
- Linearized for Platinum RTD. Available for others
- 3-Wire Lead Resistance Compensation (4-Wire Available)
- Quick-Check Red/Green Output LEDs
- Industry Standard Pinouts (8-Pin Socket)
- AC or DC Power Options
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Models JH4001 and JH4001I provide a DC output proportional to temperature as measured by a resistance thermometer (RTD). Both are fixed-range devices, precisely calibrated to your specified ranges 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 input/output isolation (Model JH4001I), AC or DC power choices and reverse-action Option RT (decreasing output with increasing input).
ORDERING INFORMATION
| Model Number: |
Select JH4001 (nonisolated) or JH4001I (input-output isolated). Add suffix –AC for AC power or –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. |
INSTALLATION AND CONNECTIONS
These transmitters plug into any standard 8-pin circular ("octal") relay socket. JH Technology offers two sockets: DS008 for DIN-rail or surface mounting and ST008 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. (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 (JH4001I only), 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. |