MTL 8104-AO-IP | Analog Output Module | 4-Channel HART
MTL 8104-AO-IP | Analog Output Module | 4-Channel HART - Image 2
MTL 8104-AO-IP | Analog Output Module | 4-Channel HART - Image 3

MTL 8104-AO-IP | Analog Output Module | 4-Channel HART

  • Model: 8104-AO-IP
  • Brand: MTL (Cooper Crouse-Hinds)
  • Series: MTL8000 I/O System
  • Core Function: Provides four channels of isolated, intrinsically safe analog output signals over an industrial Ethernet network.
  • Type: Analog Output Module
  • Key Specs: 4 Channels, 16-bit resolution, 4-20mA output, EtherNet/IP protocol.
Category: SKU: MTL 8104-AO-IP

Description

Key Technical Specifications

Parameter Value
Product Model 8104-AO-IP
Network Protocol EtherNet/IP (Industrial Protocol)
Channel Count 4 Independent Channels
Signal Type Analog Current Output
Output Range 4 mA to 20 mA (Sinking)
Resolution 16-bit Digital-to-Analog Converter
Safety Rating Intrinsically Safe (IS) / Non-Incendive
Isolation Channel-to-Channel and Field-to-Logic
Physical Connection CAGE CLAMP (Removable terminal block)
Mounting 35mm DIN Rail (Top-hat)
Operating Temp -40°C to +70°C (-40°F to +158°F)
Power Consumption 120 mA typical @ 24V DC

 

Product Introduction

The MTL 8104-AO-IP is a specialized interface module designed for the MTL8000 system, enabling precise control of field devices via EtherNet/IP networks. It converts digital commands from a PLC or DCS into analog current signals (4-20 mA) to drive control valves, positioners, or variable speed drives in hazardous areas.Unlike standard I/O modules, this unit integrates intrinsic safety barriers directly into the I/O block, eliminating the need for separate zener barriers or isolators in the cabinet. It features 16-bit resolution, ensuring high-precision positioning for critical control loops. The module supports “hot-swap” replacement, allowing maintenance teams to change the unit without powering down the backplane or the network—a critical feature for continuous process industries.

 

Installation & Configuration Guide

Preparation (10 min)

  1. Verify Network ID: Check the rotary switches on the front face (if applicable) or prepare the EDS file for your EtherNet/IP scanner (e.g., Allen-Bradley ControlLogix).
  2. Inspect Terminals: Ensure the CAGE CLAMP terminal block is free of debris.
  3. Power Down: Although hot-swappable, initial installation requires the segment power to be off to prevent arcing in hazardous zones.

Removal (If replacing existing unit)

  1. Document Wiring: Take a photo of the existing wiring before removing wires.
  2. Release Clamp: Use a 2.5mm flathead screwdriver to depress the spring clamp and pull the wire out. Do not twist the wire.

Installation (10 min)

  1. Mount to DIN Rail: Snap the module onto the 35mm DIN rail. Ensure it locks into the MTL8000 backplane connector securely.
  2. Wire Field Devices: Connect the 4-20mA loop wires to the designated output terminals.
  3. Grounding: Verify the module is grounded via the DIN rail or dedicated ground terminal to minimize electromagnetic interference.

Power-On & Test (10 min)

  1. Apply Power: Energize the 24V DC supply.
  2. Network Handshake: Watch the LED indicators. The “Network” LED should turn solid green (or blink according to the specific status definition) indicating an established EtherNet/IP connection.
  3. Force Output: Use your PLC logic to force a 50% output (12 mA). Measure at the terminals with a multimeter to verify accuracy.

 

Troubleshooting Quick Reference

Symptom Probable Cause Corrective Action
Network LED Red/Off IP Address Conflict Check the rotary switches or DHCP settings. Ensure no duplicate IP exists on the subnet.
Channel Output 0 mA Open Circuit / Fuse Check the field loop for continuity. Verify the internal channel fuse (if accessible) or replace module.
Output Stuck at Max Configuration Error Verify the scaling in the PLC (0-100% vs 4-20mA). Check that the module is not in “Hold Last State” mode due to comms loss.
erratic Signal Noise Grounding Issue Ensure the shield of the field cable is grounded at the module entry. Check for high-voltage cable proximity.

 

Dimensions, Mounting & Wiring Notes

  • Dimensions: Standard MTL8000 profile (Approx. 114mm H x 12.5mm W x 120mm D).
  • Mounting: Direct clip-on to standard 35mm DIN rail.
  • Wiring: Use 18-22 AWG stranded wire for field connections.
  • Torque: Do not overtighten CAGE CLAMPs; the spring mechanism provides the correct contact pressure.

FAQ

1. Does this module require a separate HART modem?
No. The 8104-AO-IP handles the analog signal directly. However, if you need to pass HART digital data through to a smart valve positioner, verify if your specific variant supports HART passthrough or if a specific HART interface module is required in the segment.2. Can I use this with a Rockwell (Allen-Bradley) PLC?
Yes. Since it uses EtherNet/IP, it is compatible with ControlLogix, CompactLogix, and PLC-5 systems. You will need the EDS (Electronic Data Sheet) file from the MTL website to import the device profile into RSLogix or Studio 5000.3. What does the “IP” in the model number stand for?
In this context, “IP” refers to EtherNet/IP (Industrial Protocol), not Ingress Protection. It indicates the communication protocol used to talk to the PLC. The physical enclosure rating is typically IP20 (finger-safe).4. Is the output sourcing or sinking?
The standard configuration for these process modules is typically sinking (current flows into the module from the field device powered by an external supply), but you must verify the specific wiring diagram on the side of the unit or in the manual, as configurations can vary by revision.5. How do I replace a faulty unit without rewiring?
The MTL8000 system uses a removable terminal block (CAGE CLAMP). You can disconnect the entire terminal block from the faulty module and plug it directly into the new replacement unit, saving significant time and reducing wiring errors.

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