The CTC-Locomotive Module PluX22 is intended for locomotives with the Standard Socket PluX22. Due to the standardized plug, this locomotive module can be installed without soldering work. For older locomotives, there are various adapter boards on the market with larger solder pads, cables, or even for NEM-652 (8-pin), NEM-651 (6-pin).

Property Description
Optimized for Locomotives with PluX22, via adapter also NEM-651, NEM-652, or for soldering
Dimensions 30 x 16 mm
Processor Espressif ESP32
Input voltage approx. 9 V to 24 V DC or digital current or AC (with buffer capacitor)
Motor output 1x DC motor: continuous current 1.0 A, peak 3.5 A
Switching outputs 8x 500 mA LowSide (F0L, F0R, AUX1 to AUX6)
AUX7 is not connected
Max total current 2 A
Interfaces CTC-IR receiver, bus (e.g., as I2C), 2x servo, 1x input
Current online passive TBD
Boot current 50 mA at 15 V


In the overview “CTC Locomotive Modules” you will find more modules and links to installation instructions.

Pin Assignment

Details on pin assignment and dimensions can be found in the RailCommunity Standard RCN-122.

Locomotive Module PluX22

Connection

Notes:

  • When choosing the input voltage, be sure to remember that the motors, lights, … connected to the CTC module must also be able to handle this voltage!
  • The AUX-7 connection is not assigned.
  • The bus is not supported by the current firmware.

To connect

  • plug the CTC module onto the 22-pin PluX22 socket of the locomotive.
  • plug the optional CTC IR receiver onto the 10-pin socket on the CTC module (red marking points to the center of the board).

The assignment of the light and AUX connections to switches in the app can be freely configured (Cfg.xml).

Additional Connections

  • An NFC reader can be connected to NFC-TX, NFC-RX, VCC, and GND, e.g., for small Gauge-G locomotives.
  • There are two digital inputs available under ExtIn-1 and ExtIn-2.

IR Receiver

We provide you with a cable with a suitable 10-pin plug for the IR receiver. Installed in a Piko locomotive BR 147 (#51583-2) it looks like this:

Locomotive Module PluX22 in Locomotive

Note: Since the buffer capacitor was not wired in the Piko locomotive, we soldered it directly to our CTC Locomotive Module PluX22.