Description:

The Allen Bradley 1746‑IB16 SLC500 DC input module is used in industrial automation systems to acquire discrete 24 VDC field signals and interface them with an SLC 500 programmable controller. Commonly installed in SLC 500 PLC racks and control panels to read inputs from sensors, switches, and discrete devices. Maintenance teams and system integrators use this module for I/O expansion, machine retrofits, and replacement of failed input modules.

Applications:

The Allen Bradley 1746‑IB16 module is widely used in factory and process automation environments requiring reliable discrete signal acquisition. It is commonly found in conveyor systems, packaging machinery, assembly lines, material handling equipment, and safety interlock systems where 24 VDC inputs from proximity sensors, limit switches, and pushbuttons provide status data to PLC logic for monitoring and control.

Technical Specifications:

• Model: 1746‑IB16
• Module type: DC discrete input interface for SLC 500
• Number of input points: 16
• Input voltage: 24 VDC
• Input type: Sinking/sourcing compatible
• Connection: Screw terminal field wiring
• Mounting: SLC 500 PLC rack slot
• Input current: Typical industrial logic levels
• Indicators: Individual input status LEDs
• Response time: Typical industrial logic response
• Protection: Transient suppression (platform dependent)
• Compatibility: Allen Bradley SLC 500 PLC family
• Operating temperature: Industrial range

Common Replacements:

• Allen Bradley 1746‑IT4I (isolated input variant)
• Allen Bradley 1734‑IB16 (Flex I/O input module)
• Siemens 6ES7321‑7BH01‑0AB0 (SM321 input module)