Brand: Honeywell
Category: Other
Document Type: Manual
Language: EN
Manual for SERIES 200 (MODEL 120)
Uploaded: Nov. 21, 2025, 9:12 p.m.
Manual Publish Date: 1966-03-15
Warranty Information
No warranty information is available in the provided document.
System Overview
The Honeywell SERIES 200 (MODEL 120) is a solid-state, high-speed computer designed for business data processing. It functions as an independent data processor and can also serve as an input/output processor for larger systems.
Core Components
- Central Processor: Manages system operations, executes instructions, and performs arithmetic.
- Main Memory: A coincident-current magnetic core memory with modular expansion capabilities, supporting up to 32,768 character locations.
- Control Memory: Stores 16 addressable registers for operational data and program instructions.
- Peripheral Controls: Facilitate simultaneous peripheral operations with computing via three read/write channels.
Peripheral Devices
The system can be configured with a card reader, card punch, printer, and magnetic tape units, all connected through integrated or separate peripheral controls.
Troubleshooting and error codes
| Condition | Indicator | Action |
|---|---|---|
| Parity Failure | PARITY Indicator Illuminated | Cannot normally resume program. Attempt to restart at nearest possible point. |
| Program Check | PROGRAM Indicator Illuminated | Cannot normally resume program. Attempt to restart at nearest possible point. |
| Undervoltage/Overvoltage | VOLTAGE Indicator Illuminated, RESET DC OFF Illuminated Red | D-C power removed. Reset VOLTAGE indicator by depressing STOP then RESET DC OFF. |
| Temperature Check | FAN Indicator Illuminated | D-C power removed. RESET DC OFF illuminated. DC ON indicator off. |
| Circuit Breaker Actuation | CB Indicator Illuminated | D-C power removed. RESET DC OFF illuminated. DC ON indicator off. |