User Manual

PoKeys user manual
11
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3.1. PoKeys57CNC connector pinout
Pin types
Type code
Description
DI5P
5 V digital input with input filtering
DI33P
3,3 V digital input with input filtering
DO5
5 V digital output
DO5_D
5 V digital output without series resistor
DIO33
3,3 V digital input or output without filtering
OCOC
Opto-coupled open-collector output
OCSSR
Open-collector outputs for SSR
REL
Relay output
AN33
3,3 V analog input without filtering
AN33F
3,3 V analog input with 1,9 kHz low-pass
filtering
See chapter 3.2 Pin types for details on the listed pin types.
Power supply
Pin
Type
Function
1
Supply input
Positive power supply 6-26V (marked with +)
2
Supply input
Negative power supply (ground)
PoKeys57CNC requires external 6-26V power supply to be connected to the board in order for the
device to operate correctly (device may not operate according to the specifications if the external
power supply is not present). The device uses switching power converter to scale down the input
power supply to 5V. The power supply should be capable of providing at least 2.5W.
The PoKeys57CNC v1.2 features a jumper to select the power supply source. Move the jumper to
the ‘USB’ position during testing the board without the external power supply connected. Otherwise,
put the jumper to the ‘EXT’ position.
1
2