Allen‑Bradley 1492-RIFM40F-FS120-2 – Removable Fusible Digital Interface Module

Specifications

• Pin Interface: 40-pin ribbon cable connector, compatible with 32-point digital I/O modules (ControlLogix / FLEX I/O)
• Circuit Protection: Independent 5×20mm fuse holder for each channel (fuses not included)
• Blown Fuse Indicator: 120V AC/DC LED per channel for fast fault identification
• Per-channel Rating: Max 2 A per circuit; total module max 12 A
• Operating Signal Voltage: 0–132 VAC/VDC universal industrial signal range
• Terminal Design: Dual screw terminals per I/O channel for power daisy-chaining
• Wire Range: 14–22 AWG solid/stranded copper wire
• Bus Structure: Split isolated power rails, divided into two groups to eliminate ground loop noise
• Unique Feature: RTB removable field terminal block (field wiring plug detaches separately without removing main module)
• Mounting: Standard 35 mm DIN rail
• Operating Temperature: 0 °C ~ +60 °C
• Humidity: 5%–95% RH, non-condensing
• Weight: Approx. 0.3 kg
• Certifications: UL/cULus, CE, NRTL, CSA

Key Features

1. Detachable RTB Removable Terminal Block
    
   The field wiring plug can be fully unplugged separately, enabling cabinet module replacement without disconnecting field sensor/actuator cables, greatly reducing downtime during maintenance.
2. Individual channel fusing + 120V blown fuse LED
    
   Each circuit has independent fuse protection; short circuit on one load only trips its own fuse, and the LED instantly highlights faulty channel for quick troubleshooting.
3. Dual isolated power bus
    
   Separates two groups of channels to support different power supply potentials, avoiding analog/digital ground interference.
4. Dual screw terminals per point
    
   Extra terminal positions simplify daisy-chaining DC24V/120V power for solenoids, valves and proximity sensors without extra terminal blocks.
5. Transparent safety fuse cover
    
   Allows visual inspection of fuse status while preventing accidental electric contact.
6. Keyed 40-pin ribbon connector
    
   Prevents reverse cable insertion and miswiring of PLC digital I/O cables.
7. High-density 40-point layout
    
   Saves cabinet space for large-scale digital input/output stations with dozens of sensors and actuators.

Applications

• Field wiring termination for 32-point digital input/output modules (1756 ControlLogix, 1794 FLEX I/O)
• Discrete signal wiring: proximity switches, photoelectric sensors, limit switches, solenoid valves
• Packaging, automotive assembly, material handling equipment with high I/O quantity
• Control panels requiring frequent module replacement and fast circuit fault diagnosis
• 120V AC/DC industrial control circuits with individual channel overcurrent protection