1794-IB16 Flex IO DC Input Module | Allen-Bradley
1794-IB16 is a 16-channel 24VDC sinking input module from the Allen‑Bradley Flex IO family. It places I/O near sensors or actuators, reducing cable runs and installation costs. Ideal for distributed control architectures.
Product Overview
This module provides sixteen non‑isolated sinking inputs. It mounts on terminal bases 1794‑TB3, 1794‑TB3S, 1794‑TB3K, 1794‑TB3SK, 1794‑TBKD, or 1794‑TB37DS. Use with any Flex IO adapter (DeviceNet, ControlNet, EtherNet/IP, Profibus, Remote I/O) for flexible distributed layouts.
Each channel features an independently selectable input filter (8 settings, 256 µs to 32 ms). This filters noise and prevents false triggers in electrically noisy environments. Default filter time is 256 µs.
Indicators: 16 yellow LEDs, one per channel, show field‑side status. Keyswitch position 2 ensures correct base matching.
Technical Specifications
| Brand | Allen‑Bradley (Rockwell Automation) |
| Model | 1794‑IB16 |
| Type | Flex IO DC Input Module, 16 sinking channels |
| Nominal Voltage | 24V DC (range 19.2 – 31.2V DC) |
| ON‑State Voltage | 10V DC min / 31.2V DC max |
| OFF‑State Voltage | 5V DC max |
| ON‑State Current | 8 mA @ 24V (2.0 mA min, 12 mA max) |
| OFF‑State Current | 1.5 mA min |
| Input Impedance | 4.6 KΩ max |
| Filter Times (8 steps) | 256µs, 512µs, 1ms, 2ms, 4ms, 8ms, 16ms, 32ms (OFF↔ON) |
| Flexbus Current | 30 mA @ 5V DC |
| Power Dissipation | 6.1 W max @ 31.2V DC |
| Thermal Dissipation | 20.8 BTU/hr @ 31.2V DC |
| Isolation | 850V DC (1s) between user & system; no channel‑to‑channel isolation |
| Mounting | DIN rail or panel mount |
| Dimensions (H×W×D) | 46 × 94 × 53 mm (1.8 × 3.7 × 2.1 in) |
Environmental & Certifications
- Operating temp: 0 to 55 °C (32 to 131 °F)
- Storage temp: –40 to 85 °C (–40 to 185 °F)
- Humidity: 5 – 95 % non‑condensing
- Shock (operating): 30g, 11 ms pulse
- Vibration: 5g @ 10–500 Hz (IEC 68‑2‑6)
- Agency certs: Class I Div 2, Groups A‑D; Class I Zone 2 IIC; UL, CSA, CE
- Category 2 conductor routing per publication 1770‑4.1
Compatibility & Integration
- Terminal bases: 1794‑TB3, TB3S, TB3K, TB3SK, TBKD, TB37DS
- Adapters: 1794‑ADN (DeviceNet), ‑ASB (R.I/O), ‑AENT (EtherNet/IP), ‑APB (Profibus), ‑ACN (ControlNet)
- Works with any 1794 Flex IO adapter for distributed I/O
- Direct replacement for standard Flex I/O chassis
Installation & Maintenance
- DIN rail or panel mounting; use derating curve for high‑density layouts
- Wire size: 12 AWG (4 mm²) stranded max, insulation 1.2 mm max
- Filter times set via output image table – no physical switches
- Diagnostic LEDs simplify troubleshooting; no special tools needed
Typical Applications
- Distributed I/O for conveyor systems, packaging lines, and material handling
- Remote input monitoring in harsh industrial environments
- Replacement for legacy 24V DC sinking inputs in Modicon Quantum migrations
- Interface with PLC, DCS, or SCADA via DeviceNet, Ethernet/IP, or Profibus
Diagnostic Capabilities
- 16 yellow LEDs indicate individual channel ON/OFF status
- Filter time selection filters contact bounce and electrical noise
- Flexbus status reported via adapter; module reports internal faults
- No calibration required – fully solid‑state
Frequently Asked Questions
Q: What is the default filter time?
Default is 256 µs (filter setting 0).
Q: Can I mix this with other Flex IO modules?
Yes. All 1794 Flex modules share the same adapter and terminal base.
Q: Is it isolated?
Isolation is between field and system (850V). Channels share a common return.
Q: What wire gauge fits?
Up to 12 AWG stranded with 1.2 mm insulation max.
Packaging & Delivery
- Module + terminal base (if ordered) + installation instructions (pub 1794‑5.4)
- 12‑month warranty against defects
- Shipped via FedEx, UPS, or DHL (global tracking)
Why Buy From Oiltech Controls?
- Over 15 years in industrial automation spare parts
- Global shipment with real‑time tracking
- Tested surplus / refurbished options – fully verified before shipment
- 12‑month warranty on all products
- Technical verification and configuration support
- Expert help for obsolete control systems
Contact: info@oiltechcontrols.com |
+86 158 8020 0923 (WhatsApp)
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