Emerson PAC8000 8103-AI-TX-04 | 8-Channel Analog Input Module

Product Description

The 8103-AI-TX-04 module is part of Emerson’s PAC8000 remote I/O platform, engineered for precise acquisition of analog current signals in distributed control architectures. It provides eight independent input channels for 4–20 mA loops and supports integration with HART-enabled field devices for enhanced diagnostics and asset visibility.

This module is typically deployed in hazardous or remote process areas where reliability, measurement stability, and maintainability are critical. Its architecture allows centralized monitoring of multiple transmitters while maintaining consistent performance under varying environmental conditions.

Core Technical Characteristics

• Model: 8103-AI-TX-04

• Series: PAC8000 Remote I/O

• Module Type: Analog Input (AI)

• Channel Count: 8 independent inputs

• Signal Type: 4–20 mA current loop (2-wire and 4-wire compatible)

• A/D Resolution: 16-bit

• Measurement Accuracy: ±0.1% of full span across operating range

• Repeatability: ±0.05% of span

Performance & Signal Handling

• Conversion Time:

• Standard analog input: approx. 27 ms per channel

• With HART communication enabled: up to 0.75 seconds scan cycle

• Input Diagnostics:

• Open loop detection

• Short circuit detection

• Alarm Functions: Configurable thresholds including high, high-high, low, and low-low limits

Electrical Specifications

• System Supply Current: approx. 150 mA

• Field Supply Current: approx. 300 mA

• Field Power Distribution: 24 VDC (bussed across channels)

• Isolation:

• Channel-to-backplane (Railbus): 100 VAC

• No channel-to-channel isolation (common design for multi-channel modules)

Environmental & Installation Data

• Designed for installation in hazardous locations with non-incendive field wiring

• Suitable for Zone 2 / Class I Division 2 environments

• Engineered for long-term operation in industrial conditions including vibration, temperature variation, and electrical noise

Functional Advantages

• Multi-channel acquisition reduces I/O footprint and wiring complexity

• Integrated HART capability enables device-level diagnostics without additional hardware

• Stable measurement performance for critical control loops

• Modular PAC8000 platform supports scalable remote I/O expansion

Typical Use Cases

• Upstream and downstream oil & gas facilities

• Chemical processing units

• Power generation plants

• Bulk material handling and heavy industry systems

• Remote instrumentation panels and skid-mounted systems

FAQ

Q: Can this module communicate fully with HART devices?
A: It supports HART data access for diagnostics and configuration, though scan times increase when HART polling is active.

Q: Are channels isolated from each other?
A: No, channels share a common reference. Isolation is provided between the field side and the system backplane.

Q: Is it suitable for loop-powered transmitters?
A: Yes, the integrated 24 VDC field supply supports standard 2-wire transmitters within current limits.