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MX350 Controller

The MX350 controller is specifically designed for low voltage Automatic Transfer Switch (ATS) applications. The flexible control and communications options are ideal for any application. Integrated push buttons, graphical controls and LED indicators reduce external components and wiring in addition to providing local control and access to system information. Multiple communication protocols allow simple integration into monitoring and control systems.

MX350 Controller - Specifications

Controller Specifications
Voltage Unbalance on Dropout for Source 1 and Source 2
5 to 20% of nominal
Storage Temperature
(-40˚C - 90˚C )
Load Control Relay Contacts (1)
rated for 10A @ 24VDC or 120VAC
Overvoltage Restore for Source 1 and Source 2
103 - 108% of nominal
Communications Interface - Optional
Serial RS-485 upt to 115.2 Kbps or TCP/IP (10/100 base-T)
Operating Temperature Ambient
(-20˚C to 50˚C)
Delay Transfer to Nonpreferred Source (W)
0-5 minutes
Overfrequency Restore for Source 1 and Source 2
50 - 62.9 Hz
Underfrequency Dropout for Source 1 and Source 2
45 - 59.9 Hz
Voltage Unbalance for Restore for Source 1 and Source 2
4 to 19% of nominal
Delay NeutralTransition Time Delays (DT,DW)
0-10 minutes
Overvoltage Dropout for Source 1 and Source 2
105 - 110% of nominal
Load Control Relay Contacts (2)
0-259 minutes
Underfrequency Restore for Source 1 and Source 2
45 - 59.5 Hz
Delay for Engine Cool Down (U)
0-60 minutes
Source Sensing
120 - 690 VAC +/- 1% of nominal voltage (+/- .05 Hz, +/-.5 A)
Overfrequency Dropout for Source 1 and Source 2
50.1 - 63 Hz
Undervoltage Restore for Source 1 and Source 2
85-100% of nominal
Undervoltage Dropout for Source 1 and Source 2
75-99% of nominal
Control Power
120 VAC
Technical Summary
Transfer Type
Application Dependent
Rating Range
Switch Dependent
Switch Type
Application Dependent