Product Overview

• 1756-OB32/A is a 32-point DC sourcing (PNP) output module for Allen‑Bradley ControlLogix PLC systems
• Delivers 12/24V DC digital output for solenoids, relays, contactors, and indicators
• Channels organized as 2 groups × 16 points; high‑density single‑slot design

• Status: Active / In production – standard replacement for 1756-OB32Rockwell Automation

Core Features

• 32 independent sourcing outputs (supplies +24V to load)
• Electrical isolation: 250V AC continuous per 8‑channel group
• Per‑channel short‑circuit and overload protection
• LED indicators: 32 channel status + module OK/FAULT
• Removable terminal block (1756‑TBCH / 1756‑TBS6H) for easy wiring

• Configurable fault‑mode and program‑mode states per point

Technical Parameters

• Brand: Allen‑Bradley / Rockwell Automation
• Part Number: 1756-OB32/A
• Series: ControlLogix
• Type: Discrete DC Output (Sourcing / PNP)
• Number of Channels: 32 (2×16 groups)
• Operating Voltage: 10–31.2V DC (24V nominal)
• Continuous Current: 0.5A @50°C; 0.35A @60°C (per channel)
• Surge Current: 1A for 10ms (per channel, repeatable every 2s)
• Module Total Current: Max 8A
• Backplane Current: 300mA @5.1V DC; 2mA @24V DC
• Backplane Power: 1.58W
• Isolation: 250V AC continuous (channel‑to‑backplane)
• Response Time: Typical 1ms
• Operating Temperature: 0°C to +60°C
• Storage Temperature: -40°C to +85°C
• Humidity: 5%–95% non‑condensing
• Dimensions (W×H×D): 51 × 152 × 152 mm
• Weight: ~0.3 kg

• Certifications: CE, UL, CSA, RoHS

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Applications

• Industrial automation: conveyors, material handling, assembly lines
• Machine tools, packaging machinery, and process control systems
• Driving solenoids, contactors, motor starters, and indicator lamps

• High‑density I/O expansion for ControlLogix PLC racks

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Compatibility & Replacement

• Compatible with all ControlLogix chassis (1756‑A4, A7, A10, A13, A17)
• Direct replacement for non‑A version 1756-OB32 (form/fit/function compatible)
• No firmware changes required for most applications