EverFocus EDSR 110 - Manual (Page 29)

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Descriptions:
ALMINxx: Alarm input xx (1~16)
GND: common ground for alarm inputs
ALM_COMx: output relay x , contact root
ALM_NOx: output relay x , NO contact
ALM_NCx: output relay x , NC contact
ALMRST: Alarm reset, control input for alarm reset, for dry NO contact towards GND
DISKFULL: OC output contact for signal HDD full, switches to GND
REC_IN: Control contact for recording start
SPARE_IN / OUT: System error output. TTL-level 5VDC indicates "System Okay" status. The
contact will switch to open state, if one (ore more) of below listed events appears:
a) HDD full (If overwrite mode in RECORD menu is set to STOP)
b) No HDD
c) Over-temperature HDD
d) Power Loss
e) Cooler fan fault
f) Video Loss
g) Record off
Output level:
HIGH (5 V DC): System okay
Open state: System error