How-To Guide  ·  Allen-Bradley Compact 5000  ·  Analog Output Configuration & Programming

5069-OF8: Wiring, Configuration, Scaling, and Diagnostics

Part Number: 5069-OF8  ·  Compact 5000 Platform  ·  8-Channel Analog Current/Voltage Output  ·  Studio 5000 Logix Designer

1. Module Overview

The 5069-OF8 is a Compact 5000 analog output module designed for the 5069 I/O bus. It connects to a CompactLogix 5380, Compact GuardLogix 5380, or CompactLogix 5480 controller via the high-speed Compact 5000 I/O bus. It can also be used as a remote I/O module with a Compact 5000 EtherNet/IP adapter (5069-AENTR). The module provides eight non-isolated analog output channels, each independently configurable for voltage or current mode.

Catalog Number Breakdown

Key Specifications

2. Hardware Installation

The 5069-OF8 mounts on an EN50022 35 x 7.5 mm DIN rail (zinc-plated, chromate-passivated steel) as part of the Compact 5000 system assembly. Modules interlock side by side and pass MOD power, SA power, and backplane communication module to module -- there is no separate chassis. A CompactLogix 5380 controller (or a 5069-AENTR / 5069-AEN2TR adapter for remote I/O) supplies MOD and SA power to the modules; each is fed from external 24VDC power wired to the controller's or adapter's MOD and SA power terminal blocks. There is no separate 5069 power supply module. The analog I/O modules use DC SA power.

Physical Installation Steps

1. Power off the system. Turn off MOD power and all sources of SA power at the controller or adapter power RTBs.
2. Remove the end cap from the right-most module in the system, if one is installed. Keep it -- it goes back on the last module.
3. Close the DIN rail latch. Confirm that the module's DIN rail latch is closed. If it is open, gently push the rear latch back until the front latch pops up and clicks.
4. Align the interlocking pieces of the 5069-OF8 with the device on its left. The top interlocking pieces engage first.
5. Push the module toward the DIN rail until a click indicates that it is locked in place.
6. Wire and install the RTB (5069-RTB18, ordered separately): hook the bottom of the RTB into the RTB tab on the module, push the RTB against the module until it clicks, then push the RTB handle until it clicks again.
7. Reinstall the end cap on the last module in the system.

Shielding and Grounding

Analog output signals are susceptible to electrical noise from VFDs, motor starters, and solenoid valves. Follow these grounding practices:

• Use shielded twisted-pair cable for all analog output wiring
• Ground the cable shield at one end only -- at the module terminal block end. Leave the field device end floating to avoid ground loops
• Route analog cables in a separate wire duct from 120/240V AC power wiring and VFD output cables
• Follow the conductor-category routing rules in Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1
• Cross high-voltage conductors at 90 degrees when crossing is necessary

3. Wiring

The 5069-OF8 uses an 18-pin removable terminal block (5069-RTB18-SPRING or 5069-RTB18-SCREW, ordered separately). Each channel has its own OUT+ and OUT− terminal pair. Two shared shield/drain terminals are at the bottom of the terminal block (pins 16 and 17). The wiring differs depending on whether a channel is configured for voltage or current output.

Terminal Assignments -- All 8 Channels

Voltage Output Wiring (0–10V or ±10V)

In voltage mode, the module drives a voltage across the load. The load must present a minimum impedance of 1 kΩ to avoid overloading the output driver. Maximum capacitive load is 1 µF.

Current Output Wiring (0–20mA or 4–20mA)

In current mode, the module drives a current through a series loop. The total loop resistance (cable + load) must not exceed 500Ω. Common load devices: I/P transducers (~200Ω), VFD analog inputs (~250Ω), chart recorders, and valve positioners.

Common Field Device Wiring Examples

Wire Gauge and Cable Requirements

4. Studio 5000 Configuration

The 5069-OF8 must be added to the I/O tree in Studio 5000 Logix Designer and each channel configured individually for signal type, range, and fault behavior.

Adding the Module to the I/O Tree

1. In the Controller Organizer, expand I/O Configuration → [your controller]
2. Right-click the controller node → New Module
3. In the module catalog, search for 5069-OF8 → select it → click Create
4. Set the Slot Number to match the physical position in the I/O bus (Slot 1 = first module right of controller)
5. Set the RPI (Requested Packet Interval). The valid range for Compact 5000 analog modules is 0.2–750 ms.
6. Click OK to add the module -- it appears in the I/O tree

Per-Channel Configuration

Double-click the 5069-OF8 module in the I/O tree to open Module Properties. Navigate to the Configuration tab. Each channel has the following settings:

Output Clamp Limits

Clamp limits restrict the actual output signal to a defined range, regardless of what value the ladder logic writes to the output tag. This is a module-side limit set in the module configuration (C.Chxx.LowLimit / C.Chxx.HighLimit, in engineering units). It is configured from the Logix project like any other setting, so it is not a safety function; use a safety-rated system for any limit that protects people or equipment. Clamp values are not updated automatically when you change the channel scaling.

Example: A proportional valve should only operate between 10% and 90% of its range. Configure the output for 4–20mA, then set Clamp Low to 5.6mA (10%) and Clamp High to 18.4mA (90%). Even if the program writes a value corresponding to 100%, the physical output will not exceed 18.4mA.

5. Writing Analog Values in Ladder Logic

When the 5069-OF8 is added at Slot 3 (example), Studio 5000 creates output tags for each channel:

Output Data Ranges (Engineering Units)

The 5069-OF8 output tags (Local:X:O.Chxx.Data) use REAL (floating-point) values in engineering units. Write the desired output value directly -- no raw count scaling is required.

Scaling with the SCP Instruction

The SCP (Scale with Parameters) instruction converts process engineering units (e.g., percentage, Hz, PSI) to the output signal's engineering units (e.g., mA or Volts). This is the standard approach for writing scaled values to the 5069-OF8.

Direct Write with MOV Instruction

For simple applications where the output value does not need scaling (e.g., a fixed test output or a value already in raw counts), use a MOV instruction to write directly to the channel tag:

Computed Output with CPT Instruction

The CPT (Compute) instruction can perform inline math for more complex scaling. This example maps a 0–100 PSI setpoint to a 4–20mA output controlling an I/P transducer on a control valve:

6. Practical Application: VFD Speed Reference

One of the most common uses for the 5069-OF8 is providing an analog speed reference to a variable frequency drive (VFD). This example uses a 4–20mA output from the 5069-OF8 connected to the 4–20 mA input of an Allen-Bradley PowerFlex 525 drive to control motor speed from 0 to 60 Hz.

Wiring: 5069-OF8 to PowerFlex 525

PowerFlex 525 Parameter Configuration

Configure the PowerFlex 525 to take its speed reference from the 4–20 mA input (terminal 15). Only one analog frequency source may be connected to the drive at a time.

Ladder Logic: Speed Reference Scaling

7. Diagnostics & Troubleshooting

LED Indicators

Channel Fault Diagnostics in Studio 5000

The 5069-OF8 provides module-level and per-channel diagnostic tags accessible in the controller input tags. Channel tags use two-digit channel numbers (Ch00–Ch07).

Module-Level Tags

Per-Channel Fault Tags (replace Ch00 with Ch00–Ch07)

Per-Channel Status Tags (replace Ch00 with Ch00–Ch07)

Per-Channel Output Control Tags (write to these from the controller)

Common Issues and Resolutions

8. Related 5069 Analog Output Modules

The Compact 5000 platform offers several analog output module variants. Choose based on channel count, signal type, and environmental requirements:

9. Related Guides

Reference Documentation

The following Rockwell Automation publications were used as references for this guide. These are the official manufacturer documents for the hardware covered in this article.