Version 3.3
The DS203 – I2C relay module is an 8 channel relay module. It has the same pinout as the PCA9685 PWM module and can therefore be connected in the same way. For connecting this module to Loconet, the DS104 – Lnet I2C interface can be used.
The module has one common pin labeled C and each relay has it’s own output pin (Normally Open). To minimize power consumption the module is equipped with low current LEDs but if no indication is needed, these LEDs can be turned off by removing jumper J2.
The DS203 – I2C relay module is sold as do it yourself project containing PCB and all components.
Programming info:
I2C address configurable using jumpers on J1 (A2-A1-A0):
0-0-0: 0x20
0-0-1: 0x21
0-1-0: 0x22
0-1-1: 0x23
1-0-0: 0x24
1-0-1: 0x25
1-1-0: 0x26
1-1-1: 0x27
Pinlayout on I2C IC:
Channel 1 = P0
Channel 2 = P1
Channel 3 = P2
Channel 4 = P3
Channel 5 = P7
Channel 6 = P6
Channel 7 = P5
Channel 8 = P4
Built time for an experienced tinkerer: 30 ~ 40 minutes.
