Allen-Bradley 1756-OB16E ControlLogix Digital Output Module

Description

The Allen-Bradley 1756-OB16E is a ControlLogix 16-point discrete DC output module designed to interface control signals from a ControlLogix backplane to field-side industrial loads. Operating within a voltage range of 10...31.2V DC with a nominal rating of 12/24V DC, the 1756-OB16E provides electronically fused switching across two isolated groups of 8 channels.

This module executes automated switching operations for devices such as solenoids, relays, actuators, and indicators in industrial control systems. Built with electronic short-circuit and overload protection, the 1756-OB16E maintains continuous system operation and prevents module failure under field fault conditions.

Features

• 16 discrete output channels organized into 2 groups of 8 points.
• Electronic fusing provided per channel group to protect system hardware.
• Optical and basic isolation rated at 250V continuous between outputs and backplane, as well as group-to-group.
• Electronic, software-configurable module keying to prevent incorrect placement in the chassis.
• Configurable output states for Fault mode and Program mode (Hold last state, On, or Off).
• Support for output synchronization within 16.7 s max, referenced to Coordinated System Time.

Applications

• Factory automation discrete load switching
• Solenoid valve control and actuator actuation
• Industrial indicator and annunciation panels
• Control cabinet relay interface driving

Technical Specifications

Installation Guidelines

• Chassis Mounting: Align the circuit board with the top and bottom guides of the 1756 ControlLogix chassis slot and slide the module until top and bottom locking tabs snap securely.
• Electrostatic Discharge Handling: Touch a grounded object or wear an approved grounding wriststrap before handling the unit. Do not touch backplane connectors or internal circuit components.
• Enclosure Requirements: Install inside an enclosure properly rated for the specific industrial environment (Pollution Degree 2 indoor locations).
• Wiring Terminal Blocks: Field connections require removable terminal blocks (1756-TBNH or 1756-TBSH). Apply user-defined mechanical RTB keying to prevent improper connections.
• Hazardous Area Safety: Do not disconnect equipment or field wiring unless power has been removed or the area is known to be nonhazardous.

Compliance and Certifications

• cULus: UL Listed Industrial Control Equipment (UL File E65584); UL Listed for Class I, Division 2 Group A, B, C, D Hazardous Locations (UL File E194810)
• CE: European Union 2014/30/EU EMC Directive (EN 61326-1, EN 61000-6-2, EN 61000-6-4, EN 61131-2) and 2014/35/EU LVD Directive (EN 61131-2)
• RCM: Australian Radiocommunications Act compliant with EN 61000-6-4
• Ex / ATEX: European Union 2014/34/EU ATEX Directive compliant with EN IEC 60079-0 and EN IEC 60079-7; II 3 G Ex ec IIC T4 Gc (Certificate UL22ATEX2820X)
• IECEx: IECEx System compliant with IEC 60079-0 and IEC 60079-7; II 3 G Ex ec IIC T4 Gc (Certificate IECEx UL 22.0065X)
• UKEx: UKEx Statutory Instruments 2016 No. 1107 Schedule 1 compliant; Certificate UL22UKEX2602X
• FM: FM Approved Equipment for Class I Division 2 Group A, B, C, D Hazardous Locations
• KC: Korean Registration of Broadcasting and Communications Equipment compliant with Article 58-2 of Radio Waves Act, Clause 3
• UKCA: UK Statutory Instruments 2016 No. 1091 (EMC), 2016 No. 1101 (Electrical Equipment Safety), 2016 No. 1107 (EX), and 2012 No. 3032 (RoHS)
• Morocco: Arrêtéd ministériel n° 6404-15 (15 oct 2015) and n° 6404-15 (16 juil 2015)
• CCC: CCC Certificate 2020122309111998; CNCA-C23-01 Explosion-Proof Electrical Products