Allen-Bradley 1794-IE4X0E2 – Analog Combination I/O Module | Flex I/O Platform
Engineering Background
The Allen-Bradley 1794-IE4X0E2 is a high-density analog combination module designed for the Flex I/O distributed I/O platform — Rockwell Automation’s modular, DIN-rail-mounted I/O architecture widely deployed in process control, machine automation, and hybrid manufacturing environments. The Flex I/O system communicates over standard ControlNet, DeviceNet, EtherNet/IP, and PROFIBUS backplanes, making the 1794-IE4X0E2 a versatile front-end acquisition node for Allen-Bradley PLC and PAC controllers including the ControlLogix, CompactLogix, and SLC 500 families.
Product Positioning
Engineered for procurement engineers and system integrators who require a single-slot solution combining analog input and output capability, the 1794-IE4X0E2 eliminates the need for separate input and output modules in space-constrained panel designs. Its combination architecture reduces BOM complexity, lowers installed cost, and simplifies wiring — a critical advantage in retrofit and expansion projects where rack space is at a premium.
Complete Technical Specifications
| Catalog Number | 1794-IE4X0E2 |
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Platform | Flex I/O (1794 Series) |
| Module Type | Analog Combination (Input + Output) |
| Analog Inputs | 4 channels, single-ended |
| Analog Outputs | 2 channels |
| Input Signal Range | 4–20 mA / 0–20 mA / 0–10 VDC (software selectable per channel) |
| Output Signal Range | 4–20 mA / 0–20 mA / 0–10 VDC (software selectable per channel) |
| Resolution | 12-bit (input & output) |
| Accuracy | ±0.1% of full scale (at 25°C) |
| Input Impedance | >10 MΩ (voltage mode); 250 Ω (current mode) |
| Output Load | ≤500 Ω (current); ≥1 kΩ (voltage) |
| Backplane Current Draw | 75 mA @ 5 VDC |
| Field-Side Power | 24 VDC (supplied via terminal base) |
| Operating Temperature | 0°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Relative Humidity | 5–95% non-condensing |
| Isolation | 500 VAC continuous, channel-to-backplane |
| Certifications | UL, CE, C-Tick |
| Enclosure Rating | Open-style (requires enclosure) |
| Dimensions (H×W×D) | 94 mm × 23 mm × 87 mm (approx.) |
| Weight | ~100 g |
| Compatible Terminal Bases | 1794-TB2, 1794-TB3, 1794-TB3S, 1794-TB3T, 1794-TBN |
| Compatible Adapters | 1794-ACN15, 1794-ACNR15, 1794-ADN, 1794-AENT, 1794-APB |
Proven Application Environments
- Process Control: Flow, pressure, temperature, and level loop control using 4–20 mA transmitters and control valves on a single module
- Batch & Continuous Manufacturing: Analog setpoint delivery and process variable acquisition in food & beverage, chemical, and pharmaceutical lines
- Machine Automation: Servo drive analog command output combined with encoder/transducer feedback acquisition
- HVAC & Building Automation: VAV damper control and sensor monitoring in distributed panel architectures
- Water & Wastewater: Pump speed reference output and flow/level sensor input in remote I/O drops
- Retrofit & Expansion: Drop-in replacement for aging 1794-IE4 + 1794-OE2 module pairs, recovering one slot per node
Engineering Advantages
- Single-Slot Combination: Consolidates 4 analog inputs and 2 analog outputs into one 23 mm wide module slot — critical for high-density Flex I/O racks
- Per-Channel Software Configuration: Signal type (current/voltage) and range selected via RSLogix 5000 / Studio 5000 module properties — no hardware jumpers required
- 12-Bit Resolution: Provides 4,096 counts across the full engineering range, sufficient for PID loop control and precision measurement applications
- Channel-to-Backplane Isolation: 500 VAC rated isolation protects the controller backplane from field-side transients and ground loops
- Hot-Swap Capable: Flex I/O architecture supports module removal and insertion under power when used with compatible terminal bases
- Broad Adapter Compatibility: Operates across EtherNet/IP, ControlNet, DeviceNet, and PROFIBUS adapters — no module change required when migrating network protocols
System Architecture & Signal Flow
The 1794-IE4X0E2 mounts onto a 1794-series terminal base (sold separately), which provides both the backplane connection and field-side wiring terminals. The terminal base connects to the Flex I/O adapter (e.g., 1794-AENT for EtherNet/IP), which bridges the I/O data to the ControlLogix or CompactLogix controller over the plant network. Within Studio 5000, the module appears as a standard Add-On Profile (AOP) device; input and output data are mapped directly into the controller’s I/O tree as floating-point or integer tags, accessible to ladder logic, function block, and structured text routines without additional scaling configuration.
Typical Wiring Architecture:
- Field transmitters (4–20 mA, 2-wire or 4-wire) → Input channels IN0–IN3
- Control valve positioners or VFD analog inputs ← Output channels OUT0–OUT1
- 24 VDC field power supplied via terminal base power connector
- Shield/drain wires terminated at terminal base earth ground lug
Sourcing & Quality Verification
All 1794-IE4X0E2 units supplied by Konmask.com are sourced through verified industrial distribution channels and subject to incoming inspection prior to dispatch. Each unit is checked for:
- Physical integrity — connector pins, housing, label legibility
- Firmware label and date code consistency with Rockwell Automation production records
- Functional power-on verification where test fixtures are available
- Original or OEM-equivalent anti-static packaging
Konmask does not supply counterfeit, refurbished-as-new, or grey-market product. Procurement engineers requiring traceability documentation (CoC, test reports) should contact our technical sales team prior to order placement.
Procurement Process
- Step 1 — Confirm Compatibility: Verify your existing terminal base part number (1794-TB2/TB3/TB3S/TBN) and adapter model (1794-AENT / ACN15 / ADN / APB) are compatible with the IE4X0E2 module
- Step 2 — Request Quote: Contact support@konmask.com with your required quantity, delivery timeline, and any documentation requirements
- Step 3 — Order Confirmation: Purchase order accepted via email; proforma invoice issued within 1 business day
- Step 4 — Dispatch & Tracking: Units shipped via DHL / FedEx / SF Express with full tracking; export documentation provided for international shipments
- Step 5 — Technical Support: Post-delivery commissioning support available via email and WeChat for configuration and wiring queries
Technical FAQ
Q: Can the 1794-IE4X0E2 be used with a 1794-TB2 terminal base?
A: Yes. The 1794-TB2 is a standard 2-wire terminal base compatible with the IE4X0E2. For shielded cable applications, the 1794-TB3S is recommended.
Q: Is the module compatible with Studio 5000 Logix Designer v32 and later?
A: Yes. The 1794-IE4X0E2 AOP is supported in RSLogix 5000 v16+ and all Studio 5000 Logix Designer versions. Ensure the Flex I/O EDS file is installed if using DeviceNet or ControlNet adapters.
Q: Can input and output channels be configured independently?
A: Yes. Each of the 4 input channels and 2 output channels is independently configurable for signal type (current/voltage) and range via the module properties dialog in Studio 5000.
Q: What is the update rate for analog data?
A: The module’s analog-to-digital conversion rate is approximately 10 ms per channel. Actual data update rate at the controller depends on the RPI (Requested Packet Interval) configured in the module’s connection properties — minimum RPI is typically 1 ms over EtherNet/IP.
Q: Does Konmask provide a warranty on this module?
A: Yes. Konmask provides a 90-day functional warranty on all modules. Extended warranty and advance replacement programs are available for volume procurement contracts — contact our sales team for details.
Q: Can I return a module if it is incompatible with my system?
A: Compatibility returns are accepted within 14 days of receipt, provided the module is in original, uninstalled condition. Contact support@konmask.com to initiate an RMA.
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