Wire KT LCD3 to TSDZ2 - OpenSourceEBike/TSDZ2_wiki GitHub Wiki
The KT-LCD3 is signal compatible with TSZD2 motor controller however it uses a different connector so you will need to manage the wiring connection yourself.
The simplest option is to cut your existing display cable at the display, and either splice it to the KT-LCD3 cable (easiest), or wire it directly to the KT-LCD3 board. Obviously this renders your original display useless without splicing its cable back together. If you want either throttle or brake sensor functions, you will also need to connect those components to wires in the original cable (the KT-LCD3 plays no part in those functions)
To avoid cutting your original display cable, you would need to find the source of Higo Mini-A dimension connector
The KT-LCD3 kit comes with an extension cable with plug, ready to be spliced. KT-LCD3 connectors looks like Higo mini-B Z209, available from EBike Technologies.
TSZD2 motors models are sold with or without a throttle connection. The cable that goes from the motor controller to LCD is different and here are the details -- you need to identify your cable signals (use a multimeter to measure between GND and P+ battery voltage):
| wire color | function | description |
|---|---|---|
| green | P+ | battery voltage |
| black | GND | ground |
| white | Vin | ground when LCD disabled and P+ (battery voltage) when LCD is enabled |
| brown | UART TX motor controller | sends digital data to LCD |
| orange | UART RX motor controller | receives digital data to LCD |
| purple | brake |
this signal is active low, meaning that when brakes are not active, this wire has 5V and with brakes active this wire has 0 volts. Leave this wire unconnected if you will not be using brake sensors. |
8 pin controller (usually this is a TSDZ2 with throttle):
| wire color | function | description |
|---|---|---|
| blue | P+ | battery voltage |
| black | GND | ground |
| red | Vin | ground when LCD disabled and P+ (battery voltage) when LCD is enabled |
| brown | UART TX motor controller | sends digital data to LCD |
| yellow | UART RX motor controller | receives digital data to LCD |
| green | brake |
this signal is active low, meaning that when brakes are not active, this wire has 5V and with brakes active this wire has 0 volts. Wired with the 5V wire and black GND wire for 3 pin throttle. Leave this wire unconnected if you will not be using brake sensors. |
| white | 5V | |
| orange | throttle | wired with the 5V wire and black ground wire for 3 pin throttle |
| KT-LCD3 wire color | 6 wire color (no throttle) | 8 wire color (throttle) | TSDZ2 controller wire function |
|---|---|---|---|
| red | green | blue | (P+) battery voltage |
| blue | white | red | Vin |
| black | black | black | GND ground |
| green | brown | brown | UART TX motor controller |
| yellow | orange | yellow | UART RX motor controller |
| na | purple | green | Use with brakes |
| na | na | orange | Use with throttle |
| na | na | white | For hidden brakes and throttle |
For the throttle, you will need to connect the throttle wire, the GND and 5V wire.
Some example of soldering wires :
(nb. Correct way is to stagger the cuts so that they would not short even without heatshrink, this makes a small neat bundle)
