400501-00001 | Simplex MuxPad II Multiplex Communication Module

Description 

The Simplex 400501-00001 is a MuxPad II module used in Simplex 4010 / 4020 / 4100 systems. It functions as a multiplexing / communication interface board to support system communication and device polling.

Technical Specifications 

Information About 400501-00001

The 400501-00001 is also marketed under the name “Digitize MUXPAD II”. It is intended for use in Simplex legacy panels (4010, 4020, 4100) as a polling / interface interface module. The MuxPad II helps manage multiplexed signalling or communications lines across peripheral devices. While this module is generally declared as surplus or no longer supported actively, it remains in circulation in surplus and legacy parts markets.

Key Features:

• MuxPad II Module: Supports multiplexed communications in Simplex systems.
• Legacy System Integration: Designed for 4010 / 4020 / 4100 families.
• Interface Board: Acts as a communication interface or polling module.
• Multiplex Support: Facilitates multiplexed signaling and device polling.
• Compatibility: Useful where MUX-based systems are in place.
• Surplus Availability: Often found as surplus “new-old stock.”
• Board Form Factor: PCB design for panel mounting.
• Communication Protocol: Works within Simplex multiplex or communication scheme.
• No Direct Replacement: Considered legacy with no modern equivalent explicitly stated.

The 400501-00001 delivers the reliability and precision required for multiplex communication in legacy Simplex fire alarm networks.

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