ADLINK USB-7250 - Manual (Page 45)

Operations 35
USB-7230/7250
Figure 3-11: USB-7230 Isolated Output
3.6 Relay Output (USB-7250 only)
USB-7250 provides Form C and Form A relays, with channels 0 to
3 Form C, and 4 to 7 form A, as shown.
Figure 3-12: Form C Relay
Figure 3-13: Form A Relay
Form C relays have NC (Normal Close), NO (Normal Open), and
COM (Common) contacts. The COM terminal, located in the cen-
ter,must contact either the NO pole or NC pole. When the control
bit is high (1), contact is made between the COM terminal and NO
pole, and if low (0), between the COM terminal and NC pole. Form
PHOTO COUPLER 5V
DO_n
Controller
(n=0~15)
VDD
DOn
IGND
IGND
LOAD
5~35V