This processor module executes user logic and manages all system I/O operations. It handles discrete and analog signals for demanding industrial applications. You can install this CPU directly into the main processor rack slot. The unit provides reliable control for batch processing and material handling systems.
Technical Specifications & Key Parameters
| Parameter | Detail |
|---|---|
| Product Model | Honeywell 620-0031 |
| Category | Processor Module (PLC CPU) |
| Dimensions (H x W x D) | 230 mm x 160 mm x 25 mm |
| Weight | 0.44 kg (0.97 lbs) |
| User Memory | 32 kB (stores logic, registers, and configuration) |
| Memory Type | CMOS RAM with lithium battery backup |
| Battery Life | 3 years typical (BR-2/3A lithium cell) |
| Discrete I/O Capacity | 768 inputs / 768 outputs maximum |
| Analog I/O Capacity | 48 inputs / 48 outputs maximum |
| Scan Time | 1.8 ms per 1k word of boolean logic |
| Energy Storage | 820 µF capacitor (holds memory for 18 seconds) |
| Communication Port | One RS-232 programming port (25-pin D-sub) |
| Protocol Support | Modbus RTU and Honeywell proprietary |
| Status LEDs | RUN, STOP, FAULT, BATTERY, COMM, I/O ENABLE |
| Current Draw | 360 mA at 5V DC |
| Connector Type | One 40-pin edge connector |
Detailed Feature Overview
Honeywell 620-0031 provides 32 kB of battery-backed user memory for control programs. This capacity stores ladder logic, register values, and system configuration. The processor handles up to 768 discrete I/O points for medium-sized systems. It also manages 48 analog inputs and 48 analog outputs efficiently. An 820 µF capacitor holds memory contents for 18 seconds during battery changes. Consequently, you can replace the lithium cell without losing your program.
The CPU executes 1k word of boolean logic in 1.8 milliseconds. This speed suits most industrial processes including mixing and conveying. The module supports Modbus RTU communication via the RS-232 port. You can connect a programming terminal, HMI, or SCADA system directly. Six status LEDs provide immediate feedback on processor health.
Programming and Configuration
Use Honeywell’s LogicMaster 620 software to write and debug programs. The software runs on standard Windows PCs with a serial connection. The processor supports relay ladder logic programming only. You can store up to 1500 rungs of logic in the 32 kB memory. Online editing allows program changes without stopping the PLC.
Installation and Environmental Limits
This processor draws 360 mA from the 5V DC backplane supply. Its 0.44 kg weight allows easy handling during installation. Insert the module firmly into any Series 620 rack slot. Secure it with the two locking levers provided. Operating temperature ranges from 0°C to 60°C reliably. Keep humidity below 95% without condensation for long life. Store the module between -40°C and 85°C for long-term preservation.
Details
| Weight | 0.2 kg |
|---|---|
| Dimensions | 85 × 65 × 30 mm |
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