Description
Product Overview
The GE 8115-DO-DC (originally GE Intelligent Platforms / MTL Instruments, later acquired by Emerson) is an 8-channel non-isolated digital output module within the PAC8000 remote I/O family. This module delivers discrete or pulsed DC control signals to field actuators including solenoid valves, relay coils, pilot valves and local indicator lamps. It mounts on PAC8000 railbus carrier bases, supporting configurable pulse output and user-defined fail-safe states. PAC8000 hardware was originally released under GE branding, so plant spare inventories commonly reference this part as GE 8115-DO-DC. It serves as a direct drop-in replacement spare for remote I/O racks used in oil & gas, petrochemical, chemical and power generation DCS systems.
Technical Specifications
| Parameter | Details |
|---|---|
| Part Number | 8115-DO-DC |
| Original Manufacturer | GE Intelligent Platforms / MTL Instruments (now Emerson) |
| Product Category | Digital Output (Discrete Output) Module |
| Platform | PAC8000 Remote I/O System |
| Channel Count | 8 point source outputs, non-isolated |
| Field Output Voltage | 2 ~ 60 VDC bussed field power |
| Continuous Current Per Channel | 1 A DC |
| Peak Current | 4A (<100ms); 6A (<20ms) |
| Maximum Total Module Current | 3 A |
| Max On-state Voltage Drop | 0.25 V |
| Off-state Leakage Current | ≤1.0 mA |
| Response Time | 1 ms maximum from railbus command to output |
| Railbus Supply | 12 VDC; typical 45mA, max 70mA |
| Output Modes | Discrete on/off, momentary, continuous pulse; pulse width 2ms to 130s |
| Fail-Safe Behaviour | Configurable: predefined value or retain last value |
| Environmental Rating | ISA G3 corrosive environment compliant, conformal coated PCB |
| Operating Temperature | -40°C ~ +70°C |
| Storage Temperature | -40°C ~ +85°C |
| Relative Humidity | 5% ~ 95%, non-condensing |
| Mechanical Key Code | B6 |
| Matching Field Terminal | 8617-FT-NI |
| Approximate Weight | 0.20 kg |
Compliance & Certifications
- ATEX / IECEx certification for Zone 2 hazardous area installation
- FM non-incendive approval for Class I Div 2 locations
- CE mark for EMC and Low Voltage Directive
- RoHS compliant
- Full factory functional testing before shipment
Storage & Installation Guidelines
Storage Requirements
- Store in dry, temperature-controlled warehouse; recommended ambient 10°C ~30°C, RH <70% non-condensing
- Keep sealed inside original anti-static packaging before installation
- Protect against heavy mechanical shock, continuous vibration, dust and corrosive vapors
- ESD wristband required for unpacking and PCB handling
Installation Instructions
- Remove power to PAC8000 railbus carrier before module replacement
- Wear ESD protective gear to prevent electrostatic damage to circuit components
- Insert module into designated carrier slot, mechanical keying prevents mismatched module installation
- Wire 2–60VDC field actuator loads to 8617-FT-NI removable terminal block following GE PAC8000 wiring schematics
- Check field load current rating and wiring continuity
- Restore railbus power, download I/O configuration and run full channel diagnostic test
- Hazardous area installation and commissioning must be completed by certified automation technicians
FAQ
Q: Why is 8115-DO-DC marked both GE and Emerson? A: PAC8000 series was originally developed by GE Intelligent Platforms with MTL. MTL was later acquired by Emerson, but most plant spare lists retain GE naming convention.
Q: Are the output channels galvanically isolated? A: This is non-isolated module powered digital output.
Q: Can this module generate pulse signals for field devices? A: Yes, momentary and continuous pulse outputs are configurable with adjustable pulse width.
Q: What hazardous locations can this module be deployed in? A: Approved for ATEX Zone 2 and FM Class I Division 2 non-incendive applications.
Q: What warranty is available? A: Standard 12-month warranty applies for fully tested modules under rated normal operating service conditions.
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