Description

8215‑DO‑IS 4‑Channel Intrinsically‑Safe Digital Output Module

Technical Specifications

• Product Model: 8215‑DO‑IS
• Brand: MTL
• Warranty: One Year
• Input Voltage: PAC8000 Railbus backplane power; max 560 mA module consumptionEmerson
• Operating Temperature: ‑40 °C to +70 °C
• Storage Temperature: ‑45 °C to +85 °C
• Response Time: Typical 10 ms from Railbus command to output state changeEaton
• Protection Class: IP20 (DIN‑rail carrier‑mount; ATEX / IECEx [EEx ia] IIC intrinsically‑safe field‑side certification)Eaton
• Accuracy Class: Logic‑level discrete switching; no analog measurement
• Output Frequency: Supports static, momentary‑pulse and continuous‑pulse output modes; pulse‑width configurable 2 ms‑130 sEaton
• Rated Current Range: Max 25 VDC open‑circuit voltage; per‑channel current‑limit minimum 45 mA; entity parameters V₀=25 V, I₀=110 mA, P₀=0.69 WEaton
• Communication Interface: PAC8000 Railbus backplane; snap‑on IS field terminal base (8621‑FT‑IS / 8622‑FT‑IS)Eaton
• Supported Protocols: PAC8000 Railbus; works with 8521‑RT‑DE RTU controller
• Overload Capacity: Intrinsic‑safety energy‑limiting circuitry; short‑circuit (<15 Ω) and open‑circuit (>13 kΩ) line‑fault detection; 60 V AC isolation between field‑side and Railbus backplane; no inter‑channel isolationEaton
• Dimensions: 145 mm × 34 mm × 140 mm (PAC8000 standard I/O footprint)

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Product Overview

The 8215‑DO‑IS is a 4‑channel intrinsically‑safe sinking digital‑output solenoid‑driver module for PAC8000 remote‑I/O systemsEmerson. It provides energy‑limited drive signals for IS‑rated solenoid valves, alarm indicators and LED loads located in Zone 0 / Zone 1 hazardous‑area locations. Each channel supports configurable fail‑safe state, static‑on/off, momentary‑pulse and continuous‑pulse operation. On‑board line‑fault diagnostics detect open‑loop and short‑loop field‑wiring conditions and report fault status to the host RTU over Railbus for SCADA alarming.

This module addresses critical hazardous‑site automation challenges: certified intrinsic‑safety drive for explosive‑area final elements, channel‑level wiring‑fault diagnostics, and drop‑in spare‑part compatibility for PAC8000 remote node installations. Mechanical keying prevents mismatched module‑to‑base mating; snap‑replaceable field terminals reduce maintenance downtime without replacing the electronics. Oil‑gas‑pipeline‑station engineers, well‑site automation technicians and hazardous‑area retrofit integrators benefit most. It mounts on standard PAC8000 DIN‑rail carriers, supports hot‑swap module replacement with system online, and executes valve‑actuation and alarm‑triggering functions for natural‑gas, refinery and petrochemical remote‑site installations.

Key Application Notes

• Must pair with PAC8000 carrier and host controller e.g. 8521‑RT‑DE; cannot operate as standalone hardware
• Field side certified [EEx ia] IIC for Zone 0/1 hazardous‑area IS solenoids; module electronics reside within safe‑area / Zone 2 cabinetEaton
• Requires matching IS field‑terminal base: 8621‑FT‑IS or 8622‑FT‑IS for field‑cable terminationEaton
• Fault detection identifies short‑circuit and open‑circuit field‑loop conditions for each output channel
• Configurable fail‑safe output state: high / low / last‑value upon module or bus fault
• No galvanic isolation between individual output channels; isolation exists between field‑side and Railbus logic sideEaton
• Conformal‑coated PCB variant available for high‑humidity, high‑contaminant cabinet environments

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