Allen-Bradley 1794-IR8/A FLEX I/O RTD Input Module
$123.00
$320.00
Description
Allen-Bradley 1794-IR8/A FLEX I/O RTD Input Module
The Allen-Bradley 1794-IR8/A, also cataloged as the 1794-IR8 RTD Input Module, operates as a dedicated hardware component for resistance temperature acquisition within FLEX I/O control networks. It provides 8-channel RTD and resistance signal conversion for programmable controllers through compatible 1794 adapter interfaces.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1794-IR8/A |
| Brand | Allen-Bradley |
| Dimensions | 46 x 94 x 53 mm |
| Operating Temp | 0 deg C to 55 deg C |
| Power Consumption | Max 3.0 W at 31.2 VDC |
| Product Line | FLEX I/O |
| Module Type | 8 Point RTD Input Module |
| Input Channels | 8 RTD / resistance input channels |
| Input Type | RTD and direct resistance measurement |
| Supported Sensors | Pt 100 ohm, Pt 200 ohm, Pt 500 ohm, Pt 1000 ohm, Ni 120 ohm, Cu 10 ohm |
| Resistance Range | 0 to 1000 ohm |
| Sensor Wiring | 2-wire and 3-wire RTD |
| Input Resolution | 16-bit |
| Data Format | 16-bit 2's complement integer |
| FlexBus Current | 20 mA at 5 VDC |
| External Power Supply | 24 VDC nominal, 10.5 to 31.2 VDC range |
| Conversion Rate | Approx. 325 ms for 8-channel scan |
| Isolation Voltage | 50 V continuous channel-to-system, tested at 850 VDC for 1 s |
| Compatible Terminal Bases | 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TB3TS |
Profinet / EtherNet/IP Deterministic Network Integration
The 1794-IR8/A interfaces analog temperature signals through the FLEX I/O architecture using compatible adapter modules. Communication with controller platforms is performed through supported FLEX I/O network adapters including EtherNet/IP, ControlNet, and DeviceNet configurations.
The module provides I/O density scaling within distributed control architectures by converting multiple RTD inputs into digital controller data. The 16-bit conversion structure allows PLC and PAC systems to process resistance-based temperature measurements using standard FLEX I/O data transfer mechanisms.
Frequently Asked Questions
Q: What type of temperature sensors can be connected to the 1794-IR8/A?
A: The module accepts Platinum, Nickel, and Copper RTD sensors, including Pt 100 ohm, Pt 200 ohm, Pt 500 ohm, Pt 1000 ohm, Ni 120 ohm, and Cu 10 ohm configurations.
Q: Is the 1794-IR8/A installed directly onto a controller rack?
A: No. The module is installed on a compatible FLEX I/O terminal base and communicates with the controller through a 1794 network adapter interface.
Q: Does the module support replacement under powered conditions?
A: The FLEX I/O platform supports removal and insertion under power (RIUP) for applicable modules and terminal connections. Actual replacement procedures must follow the applicable installation documentation.
Field Installation Guidelines
Install the 1794-IR8/A onto the specified FLEX I/O terminal base and verify mechanical locking before connecting field wiring. Confirm terminal base compatibility before energizing the module.
Use shielded instrumentation wiring where required by the installation environment. Keep RTD signal cables separated from motor power, relay switching, and high-current conductors to minimize electrical noise coupling.
Verify RTD wiring configuration before commissioning. Two-wire and three-wire sensor connections must match the selected field wiring arrangement to maintain measurement accuracy.
Connect the external 24 VDC supply with correct polarity and verify grounding according to the control panel electrical design. Maintain operating temperature and humidity conditions within the specified module limits.
Features
Minimum Order Quantity (MOQ)
We welcome bulk orders and have a minimum order quantity of just one unit.
Certificates and Documentation
Upon request, we can provide all necessary documentation, including Certificates of Origin/Conformance and other required export documents.
Delivery Time
For items in stock, we aim to deliver within 1-3 days after payment confirmation. Items with specified lead times will be delivered according to the quoted schedule.
Payment Methods
We accept 100% T/T (Telegraphic Transfer) payment before shipping. For items with lead times, a 30% deposit is required upfront, with the remaining 70% due before shipment. For RMB transfers, please contact us if you have an agent in China.
Warranty
We offer a standard one-year warranty on all new and original items. If you require an extended warranty, please contact us for additional cost details.
Refund and Return Policy
Your satisfaction is important to us. If you need to return an item, it must be done within 30 days of the order date. The product must be unused, unopened, and in its original packaging with all accessories included. Refunds are processed within 5-7 business days after we receive the returned item. Please note that shipping and related charges are non-refundable.
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