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General The LLD422 is a selectable RS232, RS422 and RS485 to Fibre communication transceiver.
The unit is packaged in a small plastic enclosure and requires a 9-12V external DC power supply.
Basic System Description The LLD422 has full duplex communication in RS422 mode (4-Wire) and requires a TX and a RX fibre.
In the RS485 mode (2-Wire) the unit will operate in half duplex communication. In this mode the unit can also by used in a party line configuration. (Figure 3)
In the RS232 mode (3-Wire) the unit will operate in full duplex communication.
The fibre interface for this unit remains compatible regardless of the selection for RS232, RS422 or RS485. The units can thus each be configured for another communication format with the fibre interfacing between them. This feature makes a very versatile system allowing the master controller to communicate at RS232 level and the peripheral equipment to communicate at RS485 or RS422 level.
Features - Compact.
- 3 Communication Standards in one unit.
- Repeats data without interference.
- Economical RS485 operation.
- Din Rail Mountable.
Uses - Ideally suited for Pan tilt zoom systems in video applications.
- Access control.
- Other Security and Control Systems.
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