Description

8142‑DO‑DC 16‑Channel Sourcing Digital Output Module

Technical Specifications

• Product Model: 8142‑DO‑DC
• Brand:MTL
• Warranty: One Year
• Input Voltage: Railbus logic power; field bussed supply 12‑42 VDCEmerson
• Operating Temperature: ‑40 °C to +70 °C (T6 rating valid up to 60 °C)
• Storage Temperature: ‑45 °C to +85 °C
• Response Time: Typical 3 ms output state updateEmerson
• Protection Class: IP20, DIN‑rail carrier‑mount; Class I Div2 / ATEX Zone2 approved cabinet installation
• Accuracy Class: Logic‑level discrete switching; no analog measurement
• Output Frequency: Supports static discrete and configurable pulse‑output modesEmerson
• Rated Current Range: 0.5 A per channel sourcing output; maximum 6 A total module output; Railbus consumption 125 mAEmerson
• Communication Interface: PAC8000 Railbus backplane; snap‑on field terminal base
• Supported Protocols: PAC8000 Railbus; compatible with 8521‑RT‑DE RTU controller
• Overload Capacity: Per‑channel short‑circuit protection; thermal over‑temperature shutdown; no inter‑channel galvanic isolation
• Dimensions: Standard PAC8000 I/O module footprint

Product Overview

The 8142‑DO‑DC is a 16‑channel module‑powered sourcing digital output for PAC8000 remote‑I/O systemsEmerson. It switches 12‑42 VDC field power to solenoid valves, relay coils, indicator lamps and other non‑IS field loads. It supports both steady‑state discrete outputs and programmable pulse‑output sequences for remote‑site automation workflows.

This module addresses general‑purpose remote‑I/O challenges: high‑density discrete control for non‑intrinsically‑safe field devices, flexible pulse‑mode operation, and drop‑in spare‑part compatibility for PAC8000 nodes. It is rated for installation inside Division2 / Zone2 hazardous‑area cabinets, but shall not directly connect to Zone0/Zone1 explosive‑risk field instruments. Automation engineers, oil‑gas pipeline‑station technicians and retrofit integrators benefit most. It mounts on standard PAC8000 DIN‑rail carriers, supports hot‑swap replacement while system remains online, and executes valve‑driving and alarm‑actuation functions for pipeline compressor stations, well‑site and water‑treatment remote facilitiesEmerson.

Key Application Notes

• Requires PAC8000 carrier and host controller (e.g.8521‑RT‑DE); cannot operate standaloneEmerson
• Sourcing‑type outputs; needs external bussed 12‑42 VDC field supply fed through carrier terminal baseEmerson
• No intrinsic‑safety certification; for non‑IS field loads only; use 8215‑DO‑IS for Zone0/1 IS‑rated solenoids
• Supports hot‑swap module replacement without controller shutdown
• No galvanic isolation between output channels; field‑side faults may affect multiple channels
• FM / ATEX approved for Zone2 / Class I Div2 cabinet mounting; not for direct installation in Zone0‑1 hazardous locations
• Conformal‑coated PCB variant available for high‑humidity and high‑contaminant cabinet environments