UAC-CX-01RS4 Unitronics UniStream CX Com 1xRS485

Why Choose the Unitronics UAC-CX-01RS4 Uni-COM CX 1XRS485 Module?

The Unitronics UAC-CX-01RS4 is a compact, snap-on communication module that connects to compatible UniStream Built-in controllers (US5, US7, US10 series). It provides a galvanically isolated RS485 port for Modbus RTU/TCP and other multi-drop network protocols.

Technical Specifications

• Model: UAC-CX-01RS4 - Uni-COM CX RS-485 module
• Port: Single isolated RS-485 communication port (4-pin terminal block)
• Voltage limits: 7V to +12V (differential+common-mode)
• Baud Rate: 1,200-115,200bps
• Max Nodes on Bus: 32 (multidrop network)
• Isolation: 500VAC port-to-bus and port-to-port
• Termination: DIP switches onboard (factory default terminated)
• Cable: Shielded twisted pair (per EI-485 standards); max length 1,200m (4,000ft)
• Mounting: Snap-on stacking on compatible UniStream controller COM jack
• Ingress Protection: IP20 / NEMA 1
• Operating Temperature: -20 °C to +55 °C; Storage: 30 °C to +70 °C
• Weight: ~24g
• Standards: UL, CE, EAC compliant; IEC60068-2 vibration/shock tested

Typical Applications

• Adding an RS-485 port to US5/US7/US10 UniStream controllers for Modbus networks
• Connecting multiple Modbus RTU devices in a multidrop configuration
• Reliable long-distance RS-485 comms (up to 1.2km) with galvanic isolation
• Professional controller extensions in industrial automation environments

Installation & Wiring

• Install only when the system power is off.
• The module snaps into the Uni-COM CX jack on supported UniStream controllers.
• If placed last in a stack, leave the jack cover in place for ESD protection.
• Use shielded twisted-pair cable, grounded shield at functional ground terminal only.
• Configure RS-485 termination using DIP switches: ON/ON = terminated, OFF/OFF = unterminated.

Frequently Asked Questions

• Which controllers is this compatible with?
• How many RS-485 nodes are supported?
• Do I need termination onboard?
• What is the operating temperature range?