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CTRL IN
GND
CTRL IN
GND
Idle state Playback
2. Record: The input switches to Record (or Record Standby) as long the contact is closed.
CTRL IN
GND
CTRL IN
GND
Idle state Record / Record Standby
3. Armed / Disarmed: If the contact is closed, the DVR will switch off alarm (alarm contact and motion
alarm) operation. System alarm events are always active.
CTRL IN
GND
CTRL IN
GND
DVR armed DVR disarmed
2.3.3 Alarm Output Relay
The relay outputs provide either Normally Open or Normally Closed dry contacts.
Output relay in idle state
2.4 RS-485 keyboard / PTZ Installation
All functions can be remote-controlled by the EKB-500 universal keyboard. Using the EEPbus protocol,
digital video recorders, keyboards and speed domes can be installed on one single RS-485 bus. One
system can comprise up to 8 keyboards.