Allen-Bradley 1769-OF8V Analog Voltage Output Module

Product Introduction

The Allen-Bradley 1769-OF8V belongs to the 1769 Compact I/O family and provides eight single-ended voltage outputs. You can configure each channel independently for ±10V, 0-10V, 0-5V, or 1-5V operation. This module works seamlessly with CompactLogix 1769, 1768, and MicroLogix 1500 controllers. It uses a 16-bit plus sign DAC for precise analog signal generation. Moreover, the 1769-OF8V includes comprehensive diagnostics like over-range and under-range reporting. Its built-in short-circuit and overvoltage protections ensure reliable operation. This makes it a versatile choice for various automation applications.

Technical Specifications

The conversion rate reaches 5 ms across all channels simultaneously. The step response to 63% of final output takes less than 2.9 ms. Overall accuracy stands at ±0.5% of full scale at 25°C. The output impedance is less than 1 Ω, and the maximum short-circuit current is limited to 30 mA. The module supports a capacitive load up to 1 µF and a resistive load greater than 1 kΩ at 10V DC. Additionally, the output ripple remains within ±0.05%, ensuring stable signal quality.

Mechanical and Environmental Parameters

The 1769-OF8V measures 4.65 inches in height, 1.38 inches in width, and 3.43 inches in depth. This single-width module fits easily into any 1769 I/O rack assembly. It weighs approximately 0.58 lbs (0.26 kg), making it lightweight for panel installation. The unit has an open enclosure, so you must install it indoors only. It operates reliably within a temperature range of 0 to 60°C. The accuracy drift with temperature is ±0.0086% of full scale per degree Celsius.

For wiring, the module accepts solid copper wire sizes from 22 to 14 AWG. It also supports stranded wire sizes from 22 to 16 AWG. The terminal block is finger-safe and removable, simplifying maintenance. A replacement door kit is available under part number 1769-RD. The module requires a 24V DC external power supply and provides channel-to-earth ground isolation.

Series A and B Differences

The 1769-OF8V comes in Series A and Series B versions. Series A does not allow the use of an external power supply. Series B, however, supports external 24V DC power. This additional flexibility makes Series B more suitable for applications requiring separate power sourcing. Always check your module series before installation to ensure proper wiring and power configuration.

Installation Guidelines

First, mount the 1769-OF8V onto a DIN rail or panel inside a clean, dry control cabinet. Ensure the cabinet temperature stays within 0 to 60°C and humidity remains non-condensing. Next, connect the 24V DC power supply to the designated terminals. Use twisted-pair shielded cables for the voltage output wiring to minimize electromagnetic interference.

Then, wire each output channel to the load device, observing correct polarity. Single-ended wiring is more susceptible to noise than differential wiring, so proper grounding is essential. For best results, route the wiring from beneath the module to the terminal block. After wiring, close the front door securely and apply power. The green Module OK LED should illuminate, indicating normal operation. If the LED remains off, check the power connections and bus communication.

Application Scenarios

This analog voltage output module commonly drives actuators, positioning devices, and test equipment. It also sends signals to recorders, indicators, and data acquisition systems. When integrated with a PID controller, the 1769-OF8V helps maintain precise process variables. Typical industries include automotive testing, laboratory automation, packaging machinery, and material handling. Its multiple voltage ranges and fast conversion rate make it suitable for both precision control and general-purpose applications.

Packaging List

• Allen-Bradley 1769-OF8V analog output module (1 unit)

• Removable terminal block with finger-safe cover

• Installation instructions quick guide

• Module label and identification tag

Shipping Information

We ship this product via FedEx, UPS, or DHL. Delivery timelines depend on your location and selected service level. All shipments include tracking numbers for real-time monitoring.

Frequently Asked Questions

1. Can I use the 1769-OF8V with a MicroLogix 1500 controller?
Yes, the 1769-OF8V is fully compatible with MicroLogix 1500 systems. You can mount it as an expansion I/O module alongside the controller.

2. What is the difference between Series A and Series B of this module?
Series A does not support external 24V DC power, while Series B allows external 24V DC power input. Check your module label to identify the series before installation.

3. What happens if an output is short-circuited?
The module limits the short-circuit current to 30 mA, protecting both the module and connected devices. It also reports fault conditions via channel diagnostics.

4. Do I need to calibrate the 1769-OF8V after installation?
No, this module does not require field calibration. Hardware design guarantees accuracy throughout its service life.

5. Can I mix different voltage ranges on different channels?
Yes, each of the eight channels is independently configurable. You can set some channels for ±10V, others for 0-10V, 0-5V, or 1-5V as per your application needs.