EverFocus EDR1640 Instruction Manual page 18

For EDR920 Series:
VIDEO OUT(1~9): Top row BNC connectors for video looping out 1~9.
VIDEO IN(1~9): Bottom row BNC connectors for video input 1~9 .
Alarm Input
ALM-INPUT: Normal open or normal close type alarm signal inputs.
The Alarm Input can be selected as normal open (N.O.) or normal close
(N.C.) input in the ALARM SETUP MENU. When an alarm occurs,
alarm recording will automatically start.
ALM-OUTPUT: A built-in relay offers 3 nodes which are ALM-COM (common),
ALM-NO (normal open) and ALM-NC (normal close) for external use.
Note: Please check Chapter 3.4 and APPENDIX C to see other available alarm
input/output functions.
LAN Connector: The RJ-45 network connection.
RS232 connector: D-Sub 9 pin connector for testing purposes only.
RS485 connector: RJ 45 Connector for RS485 control (via EKB500 controller)
and for multi Digital Video Recorder cascade.
FAN: Cooling FAN.
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