Product Overview
900ES1-0100 is a Serial Communication Module for Honeywell CPM systems. It provides 2 RS232 ports and 2 RS485 ports. It supports Modbus ASCII, Modbus RTU, and user defined protocol. Each RS485 port connects up to 32 slave devices. The module supports up to 6 communication modules per CPM. It is built for industrial automation integration and diagnostics.
Key Advantages
- Dual protocol support: Modbus ASCII, Modbus RTU, and user defined protocol.
- Flexible port mix: 2 RS232 and 2 RS485 ports in one module.
- High isolation: 2000 VDC galvanic isolation.
- Wide baud rate: 300 bps to 115200 bps, adjustable.
- Industrial temperature range: -40 to 70°C operation.
- Diagnostic support: Module status LED and channel communication LED.
- Experion integration: Diagnostic support included.
Technical Specifications
| Brand | Honeywell |
| Model | 900ES1-0100 |
| Series | CPM Serial Communication Module |
| Module Type | Serial Communication Module |
| Protocol Support | Modbus ASCII Master, Modbus ASCII Slave, Modbus RTU Master, Modbus RTU Slave, User Defined Protocol |
| Connector | 2 x RS232: 9-Pin D-sub male connector, share the same isolator 2 x RS485: isolated from each other and from RS232 ports |
| Galvanic Isolation | 2000 VDC |
| Max Slave Devices per RS485 Port | 32 |
| Module Status LED | Supported |
| Channel Communication LED | Supported |
| Max Communication Modules per CPM | 6 |
| Operation Temperature | -40 to 70°C |
| Storage Temperature | -40 to 85°C |
| Baud Rate | 300 bps to 115200 bps, adjustable |
| Flow Control | None, RTS-CTS, RTS |
| Parity | None, Odd, Even |
| Data Bits | 7, 8 (7 is not supported on Modbus RTU protocol) |
| Stop Bits | 1, 2 |
| Experion Integration | Diagnostic Supported |
| Max Length of User Defined Protocol | 532 Bytes |
| Supported Data Types on User Defined Protocol | USINT, UINT, UDINT, LINT, REAL, LREAL |
Measurement and Performance Notes
- Measurement range: Not applicable. This is a communication module.
- Frequency response: Not applicable. Baud rate range is 300 bps to 115200 bps.
- Sensitivity: Not applicable. Signal isolation is 2000 VDC.
- Linearity: Not applicable. Communication follows Modbus and user defined protocol.
- Resolution: Not applicable. Data types include USINT, UINT, UDINT, LINT, REAL, LREAL.
- Temperature range: -40 to 70°C operation and -40 to 85°C storage.
- Environmental tolerance: Designed for industrial control cabinets and CPM systems.
- Interference resistance: 2000 VDC galvanic isolation and isolated RS485 ports.
Installation Guide
- Mount the module in a compatible Honeywell CPM slot.
- Connect RS232 devices to the 9-Pin D-sub male connectors.
- Connect RS485 devices to the isolated RS485 ports.
- Keep RS232 and RS485 wiring separated to reduce noise.
- Set baud rate, parity, data bits, and stop bits to match each device.
- Use up to 32 slave devices per RS485 port.
- Use no more than 6 communication modules per CPM.
- Check the module status LED and channel communication LED after power up.
Commissioning and Maintenance
- Confirm protocol settings before first communication.
- Use Modbus ASCII or Modbus RTU for standard devices.
- Use user defined protocol for custom device integration.
- Review diagnostic support through Experion integration.
- Check LED status during troubleshooting.
- Verify wiring isolation and grounding to reduce interference.
- Keep spare modules for critical control systems.
Compatibility Notes
- Compatible with Honeywell CPM systems.
- Supports Experion integration with diagnostic support.
- Works with Modbus ASCII Master and Slave devices.
- Works with Modbus RTU Master and Slave devices.
- Supports user defined protocol up to 532 bytes.
- RS485 ports are isolated from each other and from RS232 ports.
Certification and Compliance Information
Certification details depend on the original Honeywell module label and system approval. Please confirm specific certification requirements with our team before purchase. Contact info@oiltechcontrols.com for verification.
Packing List
- 1 x Honeywell 900ES1-0100 Serial Communication Module
- Protective packaging
- Order and warranty documentation
Warranty and Shipping
- 12-month warranty included.
- Technical verification before shipment.
- Shipping by FedEx, UPS, and DHL.
- Global shipment support.
Typical Applications
- Honeywell CPM serial communication expansion.
- Modbus ASCII and Modbus RTU device integration.
- RS485 multi-drop networks with up to 32 slaves per port.
- RS232 device connection in control systems.
- User defined protocol integration for custom equipment.
- Legacy control system support and spare parts replacement.
- Industrial automation diagnostics and troubleshooting.
Diagnostic Capabilities
- Module status LED for quick health check.
- Channel communication LED for port activity.
- Experion integration diagnostic support.
- Protocol-level checks through Modbus and user defined protocol.
- LED-based troubleshooting during commissioning.
Why Buy From Oiltech Controls?
- Over 15 years of industrial automation spare parts experience.
- Global shipment support.
- Tested industrial surplus and refurbished options.
- 12-month warranty.
- Technical verification before shipment.
- Support for obsolete control systems.
Contact Information
Inquiries: info@oiltechcontrols.com
Phone / WhatsApp: +86 158 8020 0923
FAQ
What is the model number?
The model number is 900ES1-0100.
How many RS232 and RS485 ports does it have?
It has 2 RS232 ports and 2 RS485 ports.
Which protocols are supported?
Modbus ASCII Master, Modbus ASCII Slave, Modbus RTU Master, Modbus RTU Slave, and user defined protocol.
How many slave devices can one RS485 port support?
Up to 32 slave devices per RS485 port.
What is the isolation rating?
2000 VDC galvanic isolation.
What is the baud rate range?
300 bps to 115200 bps, adjustable.
What is the operating temperature range?
-40 to 70°C.
How many modules can one CPM support?
Up to 6 communication modules per CPM.
Is the module isolated from RS232 ports?
Yes. RS485 ports are isolated from each other and from RS232 ports.
Does it support diagnostics?
Yes. It supports module status LED, channel communication LED, and Experion integration diagnostic support.
What is the warranty?
12-month warranty.
How does shipping work?
We ship by FedEx, UPS, and DHL with global shipment support.
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