Overview
The Allen Bradley Micro800 series PLC 2085-IRT4 is a high-precision, multi-type sensor-compatible RTD/thermocouple input module with 4 independent acquisition channels. It does not require external 24V power supply; it is powered solely by the backplane bus. It is equipped with a 35mm standard DIN rail, and can be cascaded expanded on the right side of Micro800. The dimensions are wide 44.5mm × high 90mm × deep 87mm. IP20 (for installation in the control cabinet)
Specification
| Item | Specification |
|---|---|
| Model Number | 2085-IRT4 |
| Series | Allen‑Bradley Micro800 PLC Expansion Module |
| Module Type | Analog Temperature Input Module |
| Channel Quantity | 4 isolated temperature input channels |
| Compatible CPU | Micro820, Micro830, Micro850, Micro870 |
| Supported Thermocouple Types | B, C, E, J, K, L (TXK/XK), N, R, S, T |
| Supported RTD Types | Pt100, Pt200 (α=0.00385, α=0.003916), Ni618, Ni672, Cu427 |
| Compatible General Signals | 0~100mV mV signal, 0~500Ω resistance signal |
| Input Impedance | >10 MΩ |
| Single Channel Update Cycle | 12~500ms (varies with enabled channels) |
| Measurement Accuracy (RTD) | ±0.2~±0.6℃ |
| Measurement Accuracy (Thermocouple) | ±0.5~±3℃ |
| Isolation Voltage (Channel to System) | Reinforced isolation 50V |
| 5V Backplane Bus Current Draw | 160mA |
| External Power Requirement | No external 24V DC supply, powered via backplane bus |
| Diagnostics | Broken wire detection per channel |
| Status Indicators | Module run LED, 4-channel fault LED indicators |
| Terminal Type | Screw terminal block |
| Wiring Support | 2-wire / 3-wire RTD, standard thermocouple compensation wire |
| Mounting Method | 35mm standard DIN rail, cascade expansion on right of Micro800 CPU |
| Overall Dimension (W × H × D) | 44.5mm × 90mm × 87mm |
| Protection Class | IP20 (for cabinet installation only) |
| Operating Ambient Temperature | -20℃ ~ +65℃ |
| Storage Temperature | -40℃ ~ +85℃ |
| Ambient Humidity | 5% ~ 95% RH, non-condensing |
| EMC Compliance | IEC61326-1 industrial standard |
| Configuration Software | FactoryTalk Design Workbench |
| Channel Configuration Function | Independent channel mode selection (TC/RTD/mV/resistance), cold junction compensation setting |
| Certifications | cULus, CE, RCM, Class I Div.2 hazardous area certification |
| Core Functions | Broken wire alarm, automatic cold junction compensation for thermocouples, mixed connection of various temperature sensors |
FAQ
1.What type of expansion module is 2085-IRT4?
The 4-channel isolated analog temperature input expansion module, supporting thermocouple TC and resistance RTD measurements
2.What wiring methods for which sensors are supported by the 2085-IRT4 terminal form?
Supported. The The terminals are screw-type connection terminals; they support 2-wire and 3-wire RTD as well as standard thermocouple compensation wire connections.
3.What are the overall length, width and depth dimensions of the 2085-IRT4 complete machine?
The
- Width: 44.5mm × Height: 90mm × Depth: 87mm
- 35mm standard DIN rail installation
4.Which types of thermal resistors RTD are 2085-IRT4 compatible with?
The Pt100、Pt200（α=0.00385、α=0.003916）、Ni618、Ni672、Cu427
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