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Allen-Bradley 1756-OB16I ControlLogix Output Module

Allen-Bradley 1756-OB16I ControlLogix Output Module

Series#: AllenBradley

Product Details

【1756-OB16I】ALLEN-BRADLEY ControlLogix 16-Channel Fused DC Output Module, 10-31V DC, 2A per Point
Integrated per-channel fusing for robust overcurrent protection, reducing downtime in critical automation systems
Supports 10-31V DC sourcing outputs with high-side switching, ideal for driving solenoids, relays, and indicator lights
Hot-swappable design with removable terminal block (RTB) for quick field wiring and maintenance without system shutdown
Compatible with Allen-Bradley ControlLogix chassis (1756-A4, A7, A10, A13, A17) and 1756-ENxT communication modules
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Specification

Datasheet (PDF)

The Allen-Bradley 1756-OB16I is a high-performance, fused 16-channel DC output module specifically engineered for the ControlLogix platform. Designed for industrial environments demanding reliability and safety, this module delivers 10-31V DC sourcing outputs with per-channel fusing to prevent damage from short circuits or overloads. Each output is rated at 2A continuous (with derating considerations), and the module supports direct connection to 24V DC field devices. Its rugged construction includes diagnostic LEDs for channel status and fault indication, ensuring rapid troubleshooting. The 1756-OB16I integrates seamlessly with ControlLogix controllers via the 1756 backplane, offering deterministic I/O updates for time-critical processes. This module is a preferred choice for discrete manufacturing, process control, and material handling applications where fused protection and high channel density are paramount.

Parameter	Specification
Module Type	ControlLogix Digital DC Output Module
Model Number	1756-OB16I
Output Channels	16 (sourcing, high-side switching)
Voltage Range	10-31V DC (nominal 24V DC)
Output Current per Channel	2A continuous (derate above 30°C ambient; refer to manual for specific derating curve)
Total Module Current	8A maximum (sum of all channels, subject to backplane power limits)
Protection	Per-channel fusing (fuse rating: 3A, fast-acting, replaceable)
Output Type	Solid-state (MOSFET) with short-circuit and overcurrent protection via fuses
Backplane Current (5V DC)	150 mA typical
Backplane Current (24V DC)	0 mA (module derives output power from field side only)
Field Power Supply	10-31V DC, 2A per channel (user-supplied external supply)
Isolation Voltage	50V DC (channel-to-backplane, continuous); 1500V AC for 1 second (test)
Response Time (ON to OFF)	0.5 ms typical (resistive load)
Response Time (OFF to ON)	0.5 ms typical (resistive load)
Indicators	Green LED per channel (output ON), Red LED per channel (fault/fuse blow)
Terminal Block	Removable Terminal Block (RTB) with 16-pin, 3.81mm pitch
Wiring	18-14 AWG (0.75-2.5 mm²) copper wire, rated for 75°C minimum
Operating Temperature	0°C to 60°C (32°F to 140°F)
Storage Temperature	-40°C to 85°C (-40°F to 185°F)
Relative Humidity	5% to 95% non-condensing
Vibration Resistance	5 g Standard Models 10-500 Hz (operating)
Shock Resistance	30 g (operating)
Enclosure Type	Open-style (mounts in ControlLogix chassis, requires panel or cabinet)
Weight	Approximately 0.45 kg (1.0 lb)
Certifications	UL 508, CSA C22.2 No. 142, CE, ATEX (Zone 2), cULus, RoHS compliant
Compatible Chassis	1756-A4, A7, A10, A13, A17 (ControlLogix standard and redundant)
Keying	Electronic keying (software-selectable: exact, compatible, or disable)
Software Configuration	RSLogix 5000 / Studio 5000 (V20 minimum recommended)