Allen-Bradley 1794-IE8H/B FLEX I/O Analog HART Input Module
$123.00
$320.00
Description
Allen-Bradley 1794-IE8H/B FLEX I/O Analog HART Input Module
Configured for analog field signal acquisition in the Allen-Bradley FLEX I/O system, the Allen-Bradley 1794-IE8H/B (1794-IE8H Analog HART Input Module) provides direct physical and electrical execution for 4-20 mA and voltage input measurement with integrated HART communication capability.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1794-IE8H/B |
| Brand | Allen-Bradley |
| Product Type | Analog HART Input Module |
| Series | FLEX I/O Series B |
| Origin | United States |
| Number of Inputs | 8 single-ended analog input channels |
| Input Signal Range | 4-20 mA, 0-20 mA, 0 to +10 V DC, +/-10 V DC |
| HART Communication | HART Protocol Revision 5, 6, and 7 compatible |
| Resolution | 16-bit |
| Data Format | 2's complement integer, left-justified integer |
| Voltage Input Impedance | > 100 kOhm |
| Current Input Impedance | 250 Ohm |
| Accuracy | 0.1% full scale at 25 deg C |
| FlexBus Current | 80 mA at 5 V DC |
| External Power Supply | 24 V DC nominal (10.5-31.2 V DC range) |
| Power Consumption | Maximum 5.1 W at 31.2 V DC |
| Isolation Voltage | 850 V DC tested for 1 s between system and user side |
| Operating Temp | -20 deg C to +55 deg C |
| Storage Temp | -40 deg C to +85 deg C |
| Relative Humidity | 5% to 95% non-condensing |
EtherNet/IP and FLEX I/O Signal Processing Characteristics
The 1794-IE8H/B operates as an analog acquisition module within the FLEX I/O architecture. Each of the eight input channels supports single-ended measurement conversion for current and voltage field devices. The module transfers converted analog values through the FLEX I/O backplane while maintaining HART digital communication paths for compatible smart field instruments.
The Series B hardware revision provides updated component implementation compared with previous module revisions. Each channel incorporates an internal FSK HART modem, enabling secondary HART variable access and device diagnostic data transfer without external multiplexers or additional signal wiring.
Frequently Asked Questions
Q: Does the 1794-IE8H/B support HART communication on every input channel?
A: Yes. Each of the eight analog input channels includes an integrated FSK modem for HART communication. The module supports HART Protocol Revision 5, 6, and 7 devices.
Q: What is the FLEX I/O backplane current requirement of this module?
A: The module requires 80 mA from the FLEX I/O backplane at 5 V DC.
Q: What are the supported analog input signal types?
A: The module accepts current inputs including 4-20 mA and 0-20 mA, and voltage inputs including 0 to +10 V DC and +/-10 V DC.
Field Installation Guidelines
- Install the module on the designated FLEX I/O terminal base assembly and verify correct mechanical engagement before applying power.
- Separate analog signal wiring from high-current conductors and switching power cables to reduce electromagnetic interference.
- Use shielded instrumentation cable for analog field connections where required by installation standards.
- Connect cable shields according to the control cabinet grounding scheme and avoid multiple shield grounding points that may create ground loops.
- Verify external 24 V DC supply polarity and voltage range before module energization.
- Confirm field device output configuration matches the selected input range before commissioning.
- For HART-enabled devices, maintain proper loop wiring conditions to allow FSK communication signals to coexist with the analog current signal.
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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