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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.

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Voltage Unbalance on Dropout for Source 1 and Source 2
5 to 20% of nominal
Delay NeutralTransition Time Delays (DT,DW)
0-10 minutes
Control Power
120 VAC
Undervoltage Dropout for Source 1 and Source 2
75-99% of nominal
Undervoltage Restore for Source 1 and Source 2
85-100% of nominal
Overfrequency Dropout for Source 1 and Source 2
50.1 – 63 Hz
Source Sensing
120 – 690 VAC +/- 1% of nominal voltage (+/- .05 Hz, +/-.5 A)
Delay for Engine Cool Down (U)
0-60 minutes
Underfrequency Restore for Source 1 and Source 2
45 – 59.5 Hz
Load Control Relay Contacts (2)
0-259 minutes
Overvoltage Dropout for Source 1 and Source 2
105 – 110% of nominal
Voltage Unbalance for Restore for Source 1 and Source 2
4 to 19% of nominal
Storage Temperature
(-40˚C – 90˚C )
Underfrequency Dropout for Source 1 and Source 2
45 – 59.9 Hz
Overfrequency Restore for Source 1 and Source 2
50 – 62.9 Hz
Delay Transfer to Nonpreferred Source (W)
0-5 minutes
Operating Temperature Ambient
(-20˚C to 50˚C)
Communications Interface – Optional
Serial RS-485 upt to 115.2 Kbps or TCP/IP (10/100 base-T)
Overvoltage Restore for Source 1 and Source 2
103 – 108% of nominal
Load Control Relay Contacts (1)
rated for 10A @ 24VDC or 120VAC
Rating Range
Switch Dependent
Transfer Type
Application Dependent
Switch Type
Application Dependent
  • Status Leds For:
    • Transfer Inhibit
    • Active Alarms
    • Source 1 and 2 Availablity
    • Source 1 and 2 Connected
    • Time Delay Active
  • Graphical Display:
    • Color graphical display with USB Calibration/programming port and Embedded Help
    • Displays 256 time-tagged events with 1 ms resolution
    • Monitors over/under frequency, voltage conditions, frequency imbalance, and phase rotation
    • Provided detailed outage,test,and diagnostic reports
  • Ranges Of Controls / Metering:
    • Programmable generator exerciser
    • Synchroscope
    • Contacts for Source 1 and Source 2 position indication as well as remote load test signals, and engine start delay
    • Source 1 and Source 2 In-phase monitor
    • Neutral, Engine Start, and Engine stop time delay timers
  • Testing And Certification
    • Conforms to EN 60947-1, EN 60947-6-1, EN 60255-26 (EN 50263), EN 5502 / CISPR22 / EN 61000-6-2 / EN 61000-6-4
    • Tested in accordance with:
      IEC 60068-2-30
      IEC 60068-2-1
      IEC 60068-2-2
      IEC 60255-22-1
      IEC 60255-22-2
      IEC 60255-22-3
      IEC 60255-22-4
      IEC 60255-22-5
      IEC 60255-22-6
      IEC 60255-25
      IEC 60529; IP54 (front),IP20(back)
      IEC 61000-4-11
    • Quality System:
      Manufactured under an ISO 9001 Registered Program
  • Option Package A:
    • Four (4) programmable inputs and four (4) outputs assignable to additional ATS features
    • Expanded diagnostics, high-speed 256 event capture, 365 days
    • Monitoring Software (local or remote), USB interface for uploading and downloading setup parameters
    • Full function ATS control with full sensing and control capabilities
    • Full complement of programmable ATS control switches AUTO / MAN, Preferred Source selector,Commit / No Commit Xfer, Transition Mode Select for Closed Transition switch models)
  • Option Package B:
    • Waveform capture, ten (10) channels, up to 256 cycles each sixteen (16) samples / sec.
    • Ten (10) customer programmable digital and ten (10)analog alarms.
    • Includes Option Package A features, plus
    • Auto Load Shed with voltage, frequency and kW triggers.
    • Twenty (20) channel data logger, customer configurable sample period from one (1) cycle to sixty (60) minutes.
  • Option Package C:
    • Includes Option B features, plus
    • Four (4) additional inputs and outputs (totaling eight (8) in & eight (8) out)
  • Option Package D:
    • Customized user control logic
    • Includes Option Package C features, plus
    • Four (4) additional inputs and outputs (totaling twelve (12) in & twelve (12) out)
  • Option Package M:
    • Configuration for Manual Operation only (Non-Automatic)

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