MX250 Microprocessor Controller - Altorfer    

MX250 Microprocessor Controller

MX250 Microprocessor Controller

The MX250 microprocessor is standard with the entire CTS product family. The MX250 Series includes all the standard features of the MX150 Controller while offering expanded programmability and field adaptability. The high reliability and ease of unattended operation makes it ideal to use in a wide range of mission critical applications.

Technical Summary

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

Controller Specifications

Undervoltage Dropout for Source 1 and Source 2
75-98% of nominal
Undervoltage Restore for Source 1 and Source 2
85-100% of nominal
Underfrequency Dropout for Source 1 and Source 2
90-100% of nominal
Delay for Engine Cool Down (U)
0-60 minutes
Delay Transfer to Nonpreferred Source (W)
0-5 minutes
Delay NeutralTransition Time Delays (DT,DW)
0-10 minutes
Storage Temperature
(-30˚C - 75˚C ), -22˚F - 167˚F
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

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