Emerson MTL 8202-HO-IS Analog Output Module

Product Overview

The MTL 8202-HO-IS is a high-density, intrinsically safe (IS) 8-channel analog output module designed for hazardous area process control. It delivers high-precision 4-20 mA signals primarily used to drive I/P (current-to-pressure) converters, control valves, and positioners.

Technical Specifications

• Part Number: 8202-HO-IS

• Channels: 8 Single-ended output channels

• Output Signal: 4-20 mA (for I/P converters)

• Field Safety: Intrinsically Safe field circuits

• Digital Communication: HART® pass-through; Variable and status reporting

• Response Time:

• 4-20 mA mode: 20 ms (typical), 80 ms (maximum)

• HART mode: ~1 second per channel

• Module Key Code: A4

• Module Width: 42 mm

• Weight: 265 g (Net); 1.3 kg (Shipping)

• Safety Features: Open-circuit field wiring detection; Drive on "Fail-safe" (Upscale/Downscale/Last value)

• Configuration: Channel status (Active/Inactive), HART reporting (Enable/Disable)

Key Features & Engineering Advantages

• High-Density IS Protection: Provides 8 channels of intrinsically safe outputs in a single 42mm module, significantly reducing cabinet space and barrier requirements in hazardous locations.

• Intelligent HART Integration: The HART pass-through capability allows maintenance teams to perform remote diagnostics, range calibration, and status reporting of field positioners without visiting the site.

• Configurable Fail-Safe Modes: In the event of a communication loss, the module can be programmed to drive outputs to a predefined safety state (Upscale, Downscale, or Hold Last Value), preventing hazardous process excursions.

• Rapid Command Response: With a typical Railbus-to-output response of 20 ms, it provides the low-latency control required for high-performance process loops.

• Advanced Diagnostics: Built-in open-circuit detection immediately alerts the control system if field wiring is compromised, allowing for proactive maintenance and reducing system downtime.

• Error-Proof Maintenance: The A4 mechanical keying ensures that only the correct module type can be inserted into the slot, protecting the system from incorrect voltage levels or signal types.