Samsung SPD-400 User Manual page 17

Connecting to the I/O port box
Connect the Alarm I/O signal to the corresponding port of the rear port box.
ACT LINK
MONITOR
RESET
POWER
USB +
–
NO1 CM1 NC1 NO2 CM2 NC2 G S1 D+ D–
NETWORK
DC 12V
RELAY OUT SENSOR RS-485
NO1 CM1 NC1 NO2 CM2 NC2 G S1 D+ D–
RELAY OUT SENSOR RS-485
Connecting to the Alarm Input
Connect one signal cable (out of 2) of applicable sensor to the [S1] port, and the other to
the [G] port.
Connecting the Alarm Output
Connect one signal cable (out of 2) of applicable external device to the [RELAY OUT(NC, NO)],
and the other to the [CM] port.
English _17