The Johnson Controls MS-IOM3721-0 is an Input/Output Module (IOM) from the Metasys® system. It provides 37 physical I/O points and is used to expand the input/output capacity of Field Equipment Controllers (FECs), Advanced Application Controllers (FACs), Variable Air Volume Modular Assemblies (VMAs), and supervisory engines (NAE/NCE). It communicates via BACnet® MS/TP and integrates seamlessly into Johnson Controls and third-party BACnet systems.

Description

• Type: Input/Output Expansion Module
• Series: IOM37xx family 
• Function: Extends the number of inputs and outputs available to supervisory controllers and field controllers.
• Integration: Works with Johnson Controls FECs, FACs, VMAs, NAEs, and NCEs.
• Flexibility: Supports a mix of analog and digital inputs/outputs for HVAC and building automation.
• Communication: BACnet MS/TP protocol over RS-485.

Specifications