This communications interface module connects the PLC to external devices and networks. It handles data exchange between the processor and Modbus networks directly. You can install this unit into any Series 620 rack slot. The module supports multiple protocols for maximum system integration flexibility.
Technical Specifications & Key Parameters
| Parameter | Detail |
|---|---|
| Product Model | Honeywell 620-0043 |
| Category | Communications Interface Module |
| Dimensions (H x W x D) | 230 mm x 160 mm x 25 mm |
| Weight | 0.38 kg (0.84 lbs) |
| Communication Ports | One RS-232, one RS-422, one RS-485 |
| Protocol Support | Modbus RTU, ASCII, Honeywell proprietary |
| Baud Rates | 300, 1200, 2400, 4800, 9600, 19200 |
| Data Format | 7 or 8 bits, odd/even/no parity, 1 or 2 stop bits |
| Maximum Nodes | 32 devices on RS-485 multi-drop network |
| Cable Length | 50 feet for RS-232, 4000 feet for RS-485 |
| Component Count | 22 ICs, 30 capacitors, 28 resistors |
| Energy Storage | 330 µF capacitor (holds configuration for 12 ms) |
| Operating Voltage | 5V DC from backplane |
| Current Draw | 200 mA at 5V DC |
| Connector Types | One 25-pin D-sub, one 9-pin D-sub, one 5-pin screw terminal |
| Status LEDs | Power, TX, RX, fault, network active |
| Isolation | 1500 V RMS on RS-422/485 ports |
Detailed Feature Overview
Honeywell 620-0043 provides three configurable serial ports for device communication. The RS-232 port connects to local devices like printers and terminals. The RS-422 port handles long-distance point-to-point communication up to 4000 feet. The RS-485 port supports multi-drop networks with up to 32 devices. Consequently, one module can serve multiple communication needs simultaneously.
The module supports Modbus RTU, Modbus ASCII, and Honeywell proprietary protocols. You can configure each port independently for baud rate and data format. Baud rates range from 300 to 19200 for compatibility with older devices. Optical isolation on RS-422 and RS-485 ports prevents ground loop issues. A 330 µF capacitor stores configuration settings for 12 milliseconds during power dips.
Data Exchange and Diagnostics
The module exchanges data directly with the PLC processor memory. You can map incoming data to specific register addresses. Outgoing data reads directly from PLC memory locations. Four status LEDs provide clear communication feedback. The TX LED blinks during module transmission, while the RX LED blinks during reception.
Installation and Environmental Limits
This module draws 200 mA from the 5V DC backplane supply. Its 0.38 kg weight simplifies 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. The module supports both DTE and DCE device connections with simple cable wiring.
Details
| Weight | 0.2 kg |
|---|---|
| Dimensions | 85 × 65 × 30 mm |
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