1794-IA16 | Allen Bradley | 16-Point Digital Input Module

Description

The 1794‑IA16 is a FLEX I/O 16‑point digital input module designed for 120V AC sensing applications. It provides nonisolated input channels, yellow status indicators, and compatibility with multiple FLEX terminal bases. The module supports standard AC ranges from 74…132V AC and includes industrial‑grade immunity for vibration, shock, ESD, EFT/B, and surge environments.

Specifications

• Manufacturer: Rockwell Automation / Allen‑Bradley
• Part Number: 1794‑IA16
• Input Points: 16 nonisolated AC inputs
• Terminal Base Compatibility: 1794‑TB3, TB3S, TBN, TB3K, TB3SK, TBNK
• On‑State Voltage: 74…132V AC (120V AC nominal)
• On‑State Current: 5.49…14.81 mA
• Off‑State Voltage: ≤20V AC
• Off‑State Current: ≥2.9 mA
• Input Impedance: 10 kΩ nominal
• Isolation Voltage: 120V continuous; type‑tested @ 1264V AC for 60 s
• Flexbus Current: 20 mA
• Power Dissipation: 6.4 W max @ 132V AC
• Thermal Dissipation: 21.8 BTU/hr max
• Indicators: Sixteen yellow status LEDs
• Keyswitch Position: 8
• Enclosure Rating: None (open‑style)
• Wiring Category: Category 2 (signal ports)
• Dimensions: 94 × 94 × 69 mm

Environmental Ratings

• Operating Temperature: 0…55 °C
• Storage Temperature: −40…85 °C
• Surrounding Air Temp: 55 °C max
• Relative Humidity: 5…95% noncondensing
• Vibration: 5 g @ 10…500 Hz
• Shock, Operating: 30 g
• Shock, Non‑operating: 50 g
• Emissions: IEC 61000‑6‑4
• ESD Immunity: 6 kV contact, 8 kV air
• Radiated RF Immunity: 10V/m (80…2000 MHz), 1V/m (2000…2700 MHz)
• EFT/B Immunity: ±2 kV @ 5 kHz (power & signal ports)
• Surge Immunity: ±1 kV DM, ±2 kV CM
• Conducted RF Immunity: 10V rms (150 kHz…80 MHz)

Features

• 120V AC Sensing: Designed for standard AC control circuits
• Nonisolated Channels: Common reference across all inputs
• FLEX I/O Integration: Compatible with multiple terminal bases
• Status Indication: Individual yellow LEDs for each input
• Industrial Immunity: Full compliance with IEC immunity standards
• Compact Form Factor: 94 × 94 × 69 mm for dense FLEX I/O layouts

FAQ – Common Questions

• What_is_1794_IA16: A 16‑point 120V AC digital input module for FLEX I/O.
• Is_it_isolated: No, channels are nonisolated.
• Which_terminal_bases_are_supported: TB3, TB3S, TBN, TB3K, TB3SK, TBNK.
• What_is_the_input_voltage_range: 74…132V AC.
• Does_it_have_status_LEDs: Yes, sixteen yellow indicators.