Wiring query E888

[picasso]

Hi,

I've a couple of questions regarding wiring of the E888 expander unit.
The manual states that the digital inputs should be pulled to ground. Is that the 0V signal ground or the chassis ground ( Battery -)?

Pin B14 has the function 0V Comms. What is the intention of this pin and in which application can it be used?
Is it internally connected to pin B21 (0V) so I can use it as an additional sensor 0V?

Thanks,
Rolf

[Stephen Dean]

Hi Rolf,

The Digital inputs should be switched to 0V using Pin B21.

The CJC sensors and AV inputs use A15 for their 0V and A34 and B20 for 5V+.

These 0V pins will provide sufficient coverage with out needing to use B14.