A. Digital Outputs DB37 Female Connector
B. Digital Inputs DB37 Female Connector
C. Analog Inputs DB37 Female Connector
D. +15 V DC, 1.5 A Power Supply Jack

Note: The MicroSD card slot is located on the F28379D controlCARD, which is accessible when the top acrylic cover is removed. Removing the acrylic cover won't void your warranty.