Appendix: Circuit Board Description - Conrad Electronic 197720 Notice D'emploi

11. Appendix: Circuit board description

A 8 changeover contact switching outputs
Item no. 197720: Relay load 24V/AC, 7A or 24V/DC, 7A
Item no. 197730: Relay load 230V/AC, 16A or 24V/DC, 16A
B Serial input from previous relay board or control computer
C Serial output to next relay board
D Serial connection to control computer via null modem cable (9-pole)
E USB connection to the control PC via USB cable
F LEDs signal the switching status of relays K1 – K8
G JP1 to 1-2 (single board or last relay board), 2-3 all other relay boards
H Connection type to control computer: RS232:
I Power LED
J Slot for RS232 USB converter for USB operation
K Supply voltage 12V/DC to 24V/DC
L Fuse 5 * 20mm, 250V / 1A, slow-blow
JP2 & JP3 to 1-2
USB: JP2 & JP3 to 2-3
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