900ES1-0100 Serial Module Honeywell

Honeywell 900ES1-0100 Serial Communication Module

Product Introduction

The 900ES1-0100 module significantly expands serial connectivity for Honeywell controllers. It includes two RS232 ports and two RS485 ports. The RS485 channels are fully isolated from each other and from the RS232 side. Additionally, the module supports both standard Modbus and user defined protocol. You can configure it as a master or slave for Modbus RTU and ASCII. Therefore, this module fits many automation applications like PLC integration, data collection, and legacy device connection.

Technical Specifications

The 900ES1-0100 supports a wide baud rate range from 300 bps to 115200 bps, which is fully adjustable. You can set the parity to None, Odd, or Even. For data bits, choose 7 or 8; however, note that 7 data bits are not supported on Modbus RTU protocol. Stop bits can be configured as 1 or 2, and flow control options include None, RTS-CTS, or RTS.

For user defined protocol, the maximum message length is 532 Bytes, which is highlighted as a key parameter. The supported data types on this protocol are USINT, UINT, UDINT, LINT, REAL, and LREAL.

Furthermore, each RS485 port can connect up to 32 slave devices. A critical safety feature is the 2000 VDC galvanic isolation provided between all ports. This isolation ensures reliable communication in electrically noisy industrial environments.

The module includes a Module status LED and individual Channel communication LEDs for easy diagnostics. It also supports diagnostics via Experion Integration. A maximum of 6 communication modules can be installed per CPM.

Mechanical & Environmental Parameters

The 900ES1-0100 operates reliably between -40°C and 70°C. Its storage temperature range extends from -40°C to 85°C. This robust design allows the module to perform in extreme cold and intense heat without failure.

The two RS232 ports use a standard 9-Pin D-sub male connector, and both share the same isolator. Meanwhile, the two RS485 ports are fully isolated from each other. This design effectively prevents ground loops and significantly improves signal integrity over long cable runs.

Installation Guidelines

First, always power down the controller completely before inserting the 900ES1-0100 module. Next, carefully align the module with the intended backplane slot. Push it firmly until the retaining latches click into place. Then, connect your RS232 cables to the 9-pin D-sub connectors.

For RS485 wiring, always use shielded twisted-pair cables. Connect the A, B, and common terminals correctly according to your device manual. Finally, configure the baud rate, parity, and protocol type in your engineering tool. Always test the communication link after installation. Use the front panel LED indicators to verify channel activity.

Packaging List

• 900ES1-0100 Serial Communication Module (1 unit)

• 9-pin D-sub male connector dust cover (2 pieces)

• RS485 terminal block connector (1 piece)

• Quick start guide (1 copy)

Note: No communication cables are included in the package. Certificates or warranty documents are not listed here.

Shipping

All orders are shipped via FedEx, UPS, or DHL. A tracking number will be provided immediately after dispatch.

Frequently Asked Questions (FAQ)

1. Can I use the 900ES1-0100 as a Modbus RTU master and slave at the same time?
Yes, each of the four ports can be configured independently. For instance, one RS485 port can act as a master while the other RS485 port acts as a slave.

2. Does this module support 7 data bits on Modbus RTU?
No, the Modbus RTU protocol strictly requires 8 data bits. However, Modbus ASCII and the user defined protocol do support 7 data bits.

3. How do I know if the RS485 ports are truly isolated from each other?
The technical specification clearly states 2000 VDC galvanic isolation between the two RS485 ports and from the RS232 section. Therefore, no ground loop issues will occur.

4. What is the maximum cable length for RS485 communication with this module?
The maximum length depends on your baud rate. At 9600 bps, you can run cables up to 1200 meters. For best results, always use a shielded twisted-pair cable.

5. Can I use the 900ES1-0100 with a non-Honeywell PLC?
Yes, because it supports standard Modbus RTU and ASCII protocols. Many third-party devices also communicate successfully using the user defined protocol.