| Parameter | Specification | | :--- | :--- | | Output Type | Discrete (Solid State Relay or Triac/Transistor based) | | Number of Points | 8 Outputs | | Operating Voltage | 120V AC / 125V DC (Typical for Series OBDN) | | Voltage Range | 92–138V AC (47–63 Hz) / 10–125V DC | | Output Current (per point) | 2.0 Amps (Maximum) | | Output Current (per module) | 8.0 Amps (Maximum aggregate) | | Minimum Load Current | 10 mA | | On-State Voltage Drop | 1.5 Volts (Maximum at rated current) | | Off-State Leakage Current | 2.0 mA (Maximum) | | Isolation | 1500V RMS (Optical isolation between logic and field side) |
| Field | Example Value | Typical Meaning |
|-------|---------------|------------------|
| Prefix | 78081 | OEM base part number, date/lot code, or internal circuit ID |
| Infix | g503 | Variant, voltage/grade code, or firmware version (e.g., “G” = Green, “503” = 50k pot or 50×10³ value) |
| Suffix | .ic655 | Explicit IC designation; “655” may indicate a specific logic chip, op-amp, or mixed-signal device |
If you encounter 78081g503.ic655 on a failed board:
This module is typically used in industrial control systems to actuate:
Conclusion: The 78081g503.ic655 is a robust industrial I/O component designed for high-reliability switching in manufacturing environments. It offers standard 8-point control with necessary isolation and protection features required for legacy PLC architectures.
78081G503.IC655 — Overview and likely interpretations 78081g503.ic655
If you want, tell me where you found this string (device, file, log) and I’ll give specific commands to inspect it or sample vendor-search queries.
The part number 78081g503.ic655 is a specific technical file related to arcade emulation, specifically for the MAME (Multiple Arcade Machine Emulator) platform. It is not a physical consumer product, but rather a digital ROM file necessary for running specific classic arcade games. 🕹️ Technical Overview
This file serves as a BIOS component for several arcade system boards. Without it, games built on these systems will not launch in MAME.
System Compatibility: Primarily used for the TPS and ZN2 arcade bios sets.
Purpose: Acts as a common file shared between different hardware revisions to handle core system operations. | Parameter | Specification | | :--- |
Version History: This specific file was officially added to MAME in version 181.
Common Error: Users often encounter "NOT FOUND" errors if this specific file is missing from their coh1002m.zip or coh3002c.zip BIOS files. 📀 Game Compatibility
This file is required to play several notable titles, including: Primal Rage 2 Street Fighter EX2 Rival Schools Doapp 🛠️ Performance & Reliability
As a digital BIOS file, its "performance" is binary: it either works or it doesn't.
Criticality: 10/10. It is indispensable for the games listed above. Conclusion: The 78081g503
Dump Status: Historically, this file was difficult to find, often marked as "NO GOOD DUMP KNOWN" in older emulator versions before being verified and standardized.
Ease of Use: Requires placement in the correct MAME roms folder, typically within the parent BIOS zip file.
Note: You may also see the identifier "IC655" associated with automotive parts, specifically NAPA Echlin Ignition Coils. However, the prefix 78081g503 specifically identifies the arcade ROM version.
Are you trying to fix a loading error in MAME, or were you looking for the automotive ignition coil instead? I can provide the specific installation steps or vehicle compatibility depending on which one you need. MAME 182 - several roms not working