SXW-DO-FA-12-h SCHHEIDER I/O module

Description

SXW-DO-FA-12-h SCHHEIDER I/O module

Product Dimensions：

Product Description

The SXW-DO-FA-12-H is a 12-channel digital output module featuring Form A (Normally Open) relays. The “-H” designation indicates the inclusion of Hand/Off/Auto (HOA) switches on the front panel, allowing for manual override control of each output—a critical feature for commissioning and emergency maintenance in building management systems (BMS).

Product Parameters

Product Advantages

• Local Manual Control: The HOA switches provide physical “Hand” (forced ON) and “Off” overrides, bypassing the software logic for testing or emergency equipment control.

• Hot-Swappable: The patented two-piece design allows the electronics module to be swapped out of the terminal base without disconnecting any field wiring or losing communication to other modules.

• Auto-Addressing: No DIP switches are required. The module automatically detects its position on the I/O bus and assigns itself an address, significantly reducing configuration errors.

• High Reliability: Features a protective cover for convection cooling and is built with flame-retardant materials (UL94V0-5VB).

• Direct Load Capability: The Form A relays are robust enough to drive direct loads like contactors, small motors, or solenoids without needing auxiliary relays in many cases.

Important Considerations & Precautions

• Terminal Base Requirement: The module is sold as an electronic component and requires a separate terminal base (TB-IO-W1) for installation and wiring.

• Inductive Loads: When switching inductive loads (like large solenoid valves or motor starters), it is highly recommended to use external RC snubbers or diodes to protect the relay contacts from arcing.

• HOA Status Monitoring: The software can monitor the position of the Hand/Off/Auto switches. Ensure your logic accounts for when a technician has placed a point in “Manual” mode.

• Mounting Position: To ensure proper convection cooling, the module should be mounted horizontally on a DIN rail.

Product Applications

The SXW-DO-FA-12-H is standard in commercial building automation for:

• HVAC Control: Starting/stopping fans, pumps, and chillers.

• Lighting Management: Controlling lighting circuits via contactors.

• Ventilation Systems: Commanding dampers to open/close or controlling multi-stage exhaust fans.

• Boiler & Cooling Tower Control: Managing the sequencing of thermal equipment where manual override is legally or operationally required.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

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