This processor module executes user logic and manages all system I/O operations. It handles discrete, analog, and communication tasks for medium-sized 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 620-1037 |
| Category | Processor Module (PLC CPU) |
| Dimensions (H x W x D) | 230 mm x 160 mm x 25 mm |
| Weight | 0.45 kg (0.99 lbs) |
| User Memory | 48 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 | 1024 inputs / 1024 outputs maximum |
| Analog I/O Capacity | 64 inputs / 64 outputs maximum |
| Scan Time | 1.5 ms per 1k word of boolean logic |
| Energy Storage | 1000 µF capacitor (holds memory for 20 seconds) |
| Communication Ports | 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 | 400 mA at 5V DC |
Detailed Feature Overview
Honeywell 620-1037 provides 48 kB of battery-backed user memory for control programs. This capacity stores ladder logic, register values, and configuration data. The processor handles up to 1024 discrete I/O points for medium-sized systems. It also manages 64 analog inputs and 64 analog outputs smoothly. A 1000 µF capacitor holds memory contents for 20 seconds during battery changes. Consequently, you can replace the lithium cell without losing your program.
The CPU executes 1k word of boolean logic in 1.5 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 2000 rungs of logic in the 48 kB memory. Online editing allows program changes without stopping the PLC.
Installation and Environmental Limits
This processor draws 400 mA from the 5V DC backplane supply. Its 0.45 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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