Copyright © Parallax Inc.
Digital I/O Board Kit (#27113)
v1.0 2/19/2010 Page 13 of 13
Pin Definitions for 2x5 Header
Pin
Name
Function
1
V+
Relay Power (output to host controller)
2
VDD
Logic Power (input from host controller)
3
DIN
Serial Data In from 74HC165 (output to host controller)
4
DATA_RLY
Serial Data Out to 74HC595 (input from host microcontroller)
5
SCLK_IN
Synchronous Serial Clock (input from host microcontroller)
6
SCLK_RLY
Synchronous Serial Clock (input from host microcontroller)
7
LOAD_IN
Load Inputs (input from host microcontroller)
8
LAT_RLY
Latch Relay Output (input from host microcontroller)
9
VSS
Ground
10
/OE_RLY
Relay Output Enable (input from host microcontroller)
Module Dimensions
Module Schematic
A full size schematic in PDF format is available from the product page on our website.