TCS AZL1D4 Micro Decoder:
 
The AZL1D4 is the first drop-in decoder designed for the latest generation of American Z Line diesel locomotives. The design features a screw-down design, unlike previous designs which relied on slide-on contacts. Examples of locomotives which this decoder will fit include the following:
 
ALCo PA
 
The AZL1D4 can support up to four lighting functions. This decoder includes on-board forward LED with no soldering required. Optional reverse headlight is available upon request. Additional solder pads for two additional lighting functions are available. Refer to the wiring diagram for details.
 
Back EMF Load Compensation: Provides superior slow speed control and high performance under load.
Quiet Drive: Super-quiet motor control for "buzz" free motor performance.
DC Mode: Decoder will automatically detect DC power. You can also configure how your lighting effects function on DC.
RailCom®: This feature allows the decoder to talk to the command station. RailCom supports expansion for new features.
Variable Momentum: Allows you to make custom acceleration and deceleration curves.
LED Support: This product does not require external resistors when connecting LED's.
Function Remapping: Buttons 0 through 12 may be used to control the lighting functions of this decoder.
Programmable Lighting Effects: Choose from 20 separate user-programmable lighting effects!
Dimmable Brightness: Configure multiple different brightness levels for your LED's or incandescent bulbs.
Decoder Lock: Feature which prevents accidental/unwanted programming while activated.
User-Loadable Speed Tables: Configure custom speed curves and set speed limits.
 
MSRP is $58.95. (Picture courtesy of TCS.)