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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 25 to 20% of nominal

Delay NeutralTransition Time Delays (DT,DW)0-10 minutes

Control Power120 VAC

Undervoltage Dropout for Source 1 and Source 275-99% of nominal

Undervoltage Restore for Source 1 and Source 285-100% of nominal

Overfrequency Dropout for Source 1 and Source 250.1 - 63 Hz

Source Sensing120 - 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 245 - 59.5 Hz

Load Control Relay Contacts (2)0-259 minutes

Overvoltage Dropout for Source 1 and Source 2105 - 110% of nominal

Voltage Unbalance for Restore for Source 1 and Source 24 to 19% of nominal

Storage Temperature(-40˚C - 90˚C )

Underfrequency Dropout for Source 1 and Source 245 - 59.9 Hz

Overfrequency Restore for Source 1 and Source 250 - 62.9 Hz

Delay Transfer to Nonpreferred Source (W)0-5 minutes

Operating Temperature Ambient(-20˚C to 50˚C)

Communications Interface - OptionalSerial RS-485 upt to 115.2 Kbps or TCP/IP (10/100 base-T)

Overvoltage Restore for Source 1 and Source 2103 - 108% of nominal

Load Control Relay Contacts (1)rated for 10A @ 24VDC or 120VAC

Rating RangeSwitch Dependent

Transfer TypeApplication Dependent

Switch TypeApplication Dependent


Transfer Inhibit

Active Alarms

Source 1 and 2 Availablity

Source 1 and 2 Connected

Time Delay Active


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


Programmable generator exerciser


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


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


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)


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.


Includes Option B features, plus

Four (4) additional inputs and outputs (totaling eight (8) in & eight (8) out)


Customized user control logic

Includes Option Package C features, plus

Four (4) additional inputs and outputs (totaling twelve (12) in & twelve (12) out)


Configuration for Manual Operation only (Non-Automatic)



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