Dedicated Micros ©2007
1
SD Range
Relay Connector
Pin
Alarm Input Connection
1 - 17
1-17
18-25
Earth Common
End Of Line Circuitry
The following describes the EOL tamper alarms circuitry needed when EOL has been configured.
There should be two resistive values within the tamper alarm circuitry. These must be located inside
the alarm device (furthest point from the unit).
The alarm state could be Normally Open or Normally closed however the tamper states are the
same for both settings.
Open, the resistive value is 6.8K ohms (1K + 5.6K).
Closed, the resistive value is 1K ohms, as the circuit does not see the 5.6K ohm resistor.
Open Circuit Tamper, the resistive value is infinity as the circuit has been cut and therefore is ‘open’.
Short Circuit Tamper, the resistive value is 0 Ohms.
Step Connecting Serial Ports
Serial ports have two main uses:
1. Connecting twisted pair telemetry for PTZ cameras.
2. Providing text data recorded with the video e.g. Point of Sale.
Note:
Telemetry cameras should be connected to Serial 3 and 4. Text data can be retrieved from
any serial port.
