MX250 Microprocessor Controller

Rating Range	Switch Dependent
Switch Type	Application Dependent
Transfer Type	Application Dependent

Delay NeutralTransition Time Delays (DT,DW)	0-10 minutes
Delay Transfer to Nonpreferred Source (W)	0-5 minutes
Delay for Engine Cool Down (U)	0-60 minutes
Operating Temperature Ambient	40 - 400 amp molded shell (-20˚C to 65˚C) , -4˚F to 149˚F 40 - 4000 amp all others (-20˚C to 60˚C), -4˚F to 149˚F
Storage Temperature	(-30˚C - 75˚C ), -22˚F - 167˚F
Underfrequency Dropout for Source 1 and Source 2	90-100% of nominal
Undervoltage Dropout for Source 1 and Source 2	75-98% of nominal
Undervoltage Restore for Source 1 and Source 2	85-100% of nominal

Standard Equipment:

Performance
- ESD immunity test per EN61000-4-2 Class B(Level 4)
- Electrical fast transient/burst immunity test perEN61000-4-4
- Conducted and Radiated Emissions per EN55022Class B (CISPR11) (Exceeds EN55011 & MILSTD461 Class 3)
- Voltage dips and interruption immunity EN61000-4-11
- Conducted immunity test per EN61000-4-6(ENV50141)
- Ringing wave immunity per IEEE 472(ANSIC37.90A)
- Surge immunity test per EN61000-4-5 IEEE C62.41
- UL, CSA and IEC listed
- Radiated RF, electromagnetic field immunitytest per EN61000-4-3 (ENV50140) 10v/m
User Friendly Operation
- Weather and tamper resistant touchpad
- Through-the-door programming and display
- Multipurpose display: LEDs for continuous monitoring of switch position and source availability; a four line by twenty character LCD display for settings, functions, programming and annunciation
- Simplified keypad entry – menu-driven system is designed for ease of use
- Built-in diagnosis with displays for ease of troubleshooting
Additional Features
- User settings are unaffected by power outages
- Built-in programmable exerciser uses separate microcontroller with independent battery back-up to serve as clock/calendar – battery failure will not affect switch operation
- Built-in electrical operator protection
- Inputs are optoisolated for high electrical immunity to transients and noise
- Source connection and transfer data logging
- Separate line voltage components for controller isolation
- Watchdog circuit for microprocessor operation

Optional Equipment:

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