Link HD System Manual
Document # -HD System Man Iss 1.1 Issue 1.1 06/11/2007
Page 28 of 31
3.5 L1255 Data Transmitter
3.5.1 Input / Output Connections
3.5.1.1 Tally A / Tally B
Two independent Tally inputs.
NB some cameras will only support a single Tally light.
Connector - 3pin XLR Socket
Pin Function
Pin 1
Pin 2 Dry Contact
Pin 3 Dry Contact
3.5.1.2 Remote / Data
A 9 way ‘D’ Type socket provides the Remote and Data serial RS232 interfaces to the Data transmitter unit.
‘D’ Type Function
Pin 1 N/C Alarm
Pin 2 TX remote
Pin 3 RX remote
Pin 4 RX data
Pin 5 Signal Gnd
Pin 6 N/O Alarm
Pin 7 Enable
Pin 8 TX data
Pin 9 Common Alarm
3.5.1.3 Receiver Interface – RS232 / RS485
The return data from the camera is sent via the ‘User data’ and passed back to the OCP via the Data transmitter.
Connector - LEMO 6pin socket EEF.0B.306.CLL
‘Lemo’ Type Function – RS232 Function –
RS485
Pin 1 Tx Data (output) RS485
Pin 2 Rx Data (input)
Pin 3 0v 0v
Pin 4 Tx Remote (output) RS485
Pin 5 Rx Remote (Input)
Pin 6 0v 0v
3.5.1.4 OCP Interface – RS232
A 9 way ‘D’ Type socket provides the RS232 interfaces to the OCP.
‘D’ Type Function
Pin 1
Pin 2 Tx
Pin 3 Rx
Pin 4 DSR
Pin 5 0V
Pin 6 DTR
Pin 7 CTS
Pin 8 RTS
Pin 9