Exterior Wall Mounted Cooling Unit (1)

 Specific Systems PLC Control Panel   Multiplexors

Take control of your HVAC with our multiplexors

Many of our customers require N+1 redundancy for the HVAC on their buildings. 

Our multiplexor control panel is an option provided for applications that require 

multiple HVAC systems. This allows additional redundancy, often desired for 

unattended sites, and provides several standard services including:

Auto-sequencing between systems, based on 24-hr timer

Manual selection of any HVAC system in the circuit

Automatic dual-unit operation – High or low temperature condition

High Temperature Alarm – Form C dry contacts

The multiplexor is a microprocessor based PLC control panel for controlling 

multiple Specific Systems® units. If a failure of the main unit occurs 

(determined through use of multiple sensors inside each unit), the multiplexor 

automatically energizes another system to keep the area pressurized and can provide 

an audible or visible alarm to notify personnel of the failure.