Description

MTL 8202‑HO‑IS 8‑Channel Intrinsically‑Safe HART Analog Output Module

Technical Specifications

• Product Model: 8202‑HO‑IS
• Brand: MTL
• Warranty: One Year
• Input Voltage: PAC8000 Railbus backplane supply; max 630 mA module consumptionEmerson
• Operating Temperature: ‑40 °C to +70 °C
• Storage Temperature: ‑45 °C to +85 °C
• Response Time: Typical 20 ms, max 80 ms analog output update; ~1 s per‑channel HART data cycle
• Protection Class: IP20, DIN‑rail carrier‑mount; ATEX/IECEx intrinsically‑safe field‑side certification for Zone 0/1 hazardous‑area instruments
• Accuracy Class: ±20 μA @25 °C, 12‑bit resolution; max load resistance 650 Ω
• Output Frequency: 4‑20 mA analog output; HART digital pass‑through supported
• Rated Current Range: 4‑20 mA intrinsically‑safe analog output for I/P converters and valve positioners
• Communication Interface: PAC8000 Railbus backplane; requires matching IS snap‑on field terminal base
• Supported Protocols: HART pass‑through; Railbus I/O bus; compatible with 8521‑RT‑DE RTU controller
• Overload Capacity: Intrinsic‑safety energy‑limiting circuit; open‑circuit field‑loop detection; 60 V AC isolation between field‑side and Railbus backplane; no inter‑channel isolation
• Dimensions: 42 mm width, standard PAC8000 I/O footprint; key‑code A4; weight 265 g
• 

Product Overview

The 8202‑HO‑IS is an 8‑channel intrinsically‑safe HART‑capable analog output module for PAC8000 remote‑I/O systems. It outputs certified energy‑limited 4‑20 mA signals to drive I/P converters, smart valve positioners and modulating actuators installed within Zone 0 / Zone 1 hazardous‑area locations. HART pass‑through enables reading device diagnostics, secondary variables and status information from HART smart field devices over the analog control loop.

This module addresses hazardous‑site control challenges: intrinsically‑safe analog control for explosive‑risk control‑valve loops, HART instrument diagnostic access, and drop‑in spare‑part compatibility for PAC8000 remote nodes. User‑configurable fail‑safe output states support upscale, downscale or hold‑last‑value upon bus or module fault. Automation engineers, oil‑gas pipeline‑station technicians and hazardous‑area retrofit integrators benefit most. It mounts on standard PAC8000 DIN‑rail carriers, supports hot‑swap replacement with system online, and executes modulating valve‑control functions for natural‑gas compressor‑stations, well‑sites and petrochemical remote‑site installations.

Key Application Notes

• Requires PAC8000 carrier and host controller (e.g. 8521‑RT‑DE); cannot run standalone
• Field‑side [EEx ia] IIC intrinsically‑safe certified for Zone 0/1 field instruments; module electronics must be installed in safe‑area cabinet / Zone 2 cabinet
• Must pair with IS‑rated blue‑colored terminal base e.g. 8621‑FT‑IS; do not use non‑IS 8610‑FT‑NA / 8612‑FT‑NA terminal bases
• Detects open‑circuit field‑wiring faults and reports alarms to SCADA via Railbus
• Configurable fail‑safe output behavior for critical modulating control loops
• Mechanical key‑code A4 prevents mismatched module‑to‑base insertion
• No galvanic isolation between individual output channels; isolation exists between field‑side and Railbus logic side
• Conformal‑coated PCB variant available for high‑humidity and high‑contaminant cabinet environments