ZIMO MX821S DCC Accessory Decoder - 8 Servo Control

ZIMO servo decoders are used to operate and generate feedback from servo motors for controlling turnouts, crossing gates, semaphore signals, and similar devices.

ZIMO servo decoders are compatible any type of traditional 5V servo.

ZIMO servo decoders conform to applicable NMRA DCC Standards and Recommended Practices including programming and opreration through accessory addresses and Rail-Com compatability.

ZIMO servo decoders also offer updatable firmware, including Synchronous Update using the MXULF-A.


ZIMO MX821 DCC Decoders offer the following features:

The MX821 is the modern "servo model" for accessory control in the ZIMO decoder range.  It comes in two variations of a single format, has plenty of power, operates up to eight traditional 5V servos and has optional outputs for signal lights or frog polarization.

The MX821V model features manual control switch inputs with LED position indicator outputs and a unique option for addressable "Day/Night" dimming for the lighting outputs.

Decoder Formats:

Dimensions:  4.14 x 1.97 x .59 inch (105 x 50 x 15 mm)
  
  
Specifications:

• 5.0V Servo Control Voltage
• 3.0A Continuous Current - Servo Drives 
• 0.1 to 25 sec Servo Rotation Speed
• [V] 1.6A Continuous Current - Function Outputs
• [V] 16 Manual Switch Input
• [V] 16 - Normal "Open Collector" Function Outputs

Feature Summary:

• Service and "Search and Program" OPs Mode Psuedo-Programming
• Controllable motor output time, speed and direction
• Programmable manual switch inputs
• Addressable "Day/Night" dimming control
• NMRA bidirectional communication (RailCom)
• Controllable initialization cycling 
• Short circuit protection
• Thermal protection
• Reliable overload protection
• NMRA bidirectional communication (RailCom)
• User updateable firmware, including Synchronous Update using the MXULF-A.

ZIMO Features and Characteristics:

• Conforms to applicable NMRA DCC Standards and Recommended Practices.
• Address range from 1 ... 511.
• Supports Operations Mode (Program On Main) and Service Mode (Program Track) CV Programming.
• Special programming mode called "Pseudo Programming" for Operations Mode programming.
• Hard reset with CV #8 = 8; Optional hard reset to Alternate CV Set or sound project with CV #8 = 0.
• User Updatable - Install the latest firmware yourself, in minutes, at no charge and without opening the locomotive. All ZIMO decoders come with this feature (including function and accessory decoders).  The new firmware is always available at no charge from the ZIMO or ZIMODCC web site. (Requires MX10, MXULFA, or other device)

ZIMO Safety Features:

• Reliable high voltage protection and short circuit protection for motor and function outputs.
• Thermal protection (100 - 120 C), shuts decoder down and notifies user with flashing headlights.
• Safe for use with track voltage up to 24 V.

ZIMO Light Output Features:

• 16 Normal function outputs on Light decoder types.
• Variable cycle times and minimum dim values.

ZIMO Feedback Features:

• RailCom - bidirectional communication hardware is found in all ZIMO decoders:
• CV "on-the-main" read-out and confirmed programming
• RailCom address feedback
• Many more RailCom applications in future software releases

RailCom is a Trade Mark of Lenz GmbH