Discrete Output Module Allen-Bradley 1756-OB16IEFS ControlLogix

Product Overview

The Allen-Bradley 1756-OB16IEFS is a discrete output module. It belongs to the ControlLogix series. This module offers 16 DC output points. It operates on 12/24 V DC. The module supports both sink and source wiring. It features high-speed Pulse Width Modulation (PWM). The PWM cycle time ranges from 1 ms to 1 hour. This makes it ideal for precise control tasks. The module delivers a maximum of 2 Amps per point. This rating applies at 30 degrees Celsius. At 60 degrees Celsius, it delivers 1 Amp per point. The total module current reaches 8 Amps at 30 degrees Celsius. It reaches 4 Amps at 60 degrees Celsius. The module uses a removable terminal block. It accepts the 1756-TBCH or 1756-TBS6H block. This design simplifies wiring and maintenance.

Application Scenarios

The 1756-OB16IEFS fits many automation tasks. Use it for high-speed valve control. It works well for solenoid actuation. The module handles indicator light arrays. It manages small motor contactors. The PWM feature suits proportional control. Use it for heating element regulation. It works for speed control of small DC devices. The module is common in packaging machines. It appears in material handling systems. It also works in automotive assembly lines. The high surge current rating handles pilot duty loads. This makes it reliable for harsh industrial environments.

Technical Specifications

This module has specific electrical ratings. The input voltage range is 10-30 Volts DC. The backplane draws 350 milliamps at 5 Volts. It draws 3 milliamps at 24 Volts. Total backplane power is 1.7 Watts. Maximum power dissipation is 3.6 Watts at 60 Celsius. The isolation voltage is 50 Volts continuous. Continuous isolation voltage is 250 Volts. The off-state leakage current is below 0.1 mA per point. Surge current is 4 Amps for 10 ms. It repeats every 2 seconds. Maximum on-state voltage drop is 0.4 V DC at 2 Amps. It is 0.2 V DC at 1 Amp. The minimum load current is 1 mA per point. Unscheduled output delay time is 14 µs nominal. It reaches 23 µs maximum. The PWM on time ranges from 200 µs to 1 hour. On-time accuracy is plus or minus 20 µs. The module enclosure type is None.

Installation & Maintenance Guide

Install the module into a ControlLogix chassis. Use a 1756-TBCH or 1756-TBS6H terminal block. Ensure power is off before wiring. Connect the DC power supply correctly. Observe polarity for sink or source wiring. Use proper wire gauges for current. Tighten terminal screws securely. Do not exceed rated current per point. Derate current at higher temperatures. The module supports up to 4 channels at 2 Amps at 45 Celsius. At 60 Celsius, all channels run at 1 Amp. Keep the enclosure clean and dry. Check connections during routine maintenance. Replace the module only with the same type.

Packing List

Each package includes one 1756-OB16IEFS module. It includes a documentation sheet. The terminal block is sold separately. Order the 1756-TBCH or 1756-TBS6H block. No additional cables are included. The module is packed in anti-static material. Shipping is via FedEx, UPS, or DHL.