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NEXT18 (NEM 662)

The purpose of this new interface is to provide a safe and secure miniture decoder connection for N, TT and small HO models.
The NEXT18 interface will control both DC and Coreless motors and provides electrical connections for up to 7 function outputs (F0 + AUX1-AUX6).  Manufacturers are free to use as many of thes connections as they want.  Any connections not used may be left unconnected in the loco circuit board.

The 18 pins are arranged symetrically so that if a decoder is installed the wrong way round then no damage will occur.  This arrangement also means that track power and ground connections are duplicated to increase the current that may flow through them and for a more reliable connection.    Each pin can carry 0.5amp so track pick up can be 1.0amp and ground can also be 1.0amp (Because 2 contacts are used) all other connections will be 0.5amp maximum.

Connection Contact No. Contact No. Connection
Track right 1 18 Track Right
Motor+ 2 17 F0 r
AUX1 3 16 AUX5
AUX3 4 15 U+
GND 5 14 GND
U+ 6 13 AUX4
AUX6 7 12 AUX2
F0 f 8 11 Motor-
Track Left 9 10 Track Left

For models designed to accept sound decoders then AUX 5 becomes Loudspeaker A and AUX 6 becomes Loudspeaker B

Lenz 10318-01 Silver Next18
LE10318-01Lenz 10318-01 Silver Next18

Lenz 10318-01 Silver Next18

The Lenz Digital Plus Silver locomotive decoder is suitable for all DC Locos with Next18 interface.  At the moment Next 18 is found in Bachmann Liliput and Tillig products.

Click here for an explanation of Next18 connections

The characteristics of the decoder are:

  • Super smooth and silent high frequency back emf motor control
  • Supports Automatic Braking Control (ABC)
  • Shunting speed on F3
  • Suitable for operation with 14/27 or 28/128 speed steps
  • Operation on conventional DC layouts is posible or may be disabled
  • Motor and function outputs have short circuit protection
  • Seven function outputs rated at 500mA each with advanced function mapping
  • Directional or independent lighting with dimming and special effects
  • Support for Multiple traction and long addresses (Loco addresses up to 9,999)
  • Support for programming on the mainline (Programming on Main POM)
  • Support for all forms of programming as described in NMRA RP-9.2.3
  • RailCom


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