Leaf LT2020E manual
Page 11 Of 18
3.8 RS232 Serial Control connectors
The unit can be controlled by serial commands through the RS232 input port. Typically
this would be connected to a control system with a straight through DB9 Male to
Female RS232 lead. Some control systems may require only the TxD, RxD and Gnd
wires of an RS232 lead to be connected. The pin configurations of these 3 connections
on the DB9 plug is: TxD = Pin 2, RxD = Pin3, Gnd = Pin5.
3.8.1 Single LT2020E use
The RS232 Input port is used for controlling the unit.
The TERM (Termination) switch (ref: para 3.10) must be set to ON (Up).
3.8.2 Multiple L
T
2020E use
Multiple units can be chained together and addressed on the same RS232 link
by connecting the RS232 thru (out) port on one unit to the RS232 input port of
the next unit.
The last unit in the chain must have the TERM (Termination) switch (ref:para 3.10)
set to ON (Up), while all other units in the chain must have this switch set to OFF
(Down). The RS232 Input port is used for controlling the units.
3.9 RS232 Termination (TERM) Switch
The RS232 termination switch must be used to correctly terminate any RS232 control
connection as described in paragraphs 3.8.1 and 3.8.2.
3.10 HDMI Input ports
Standard HDMI input ports are provided for the purpose of connecting HDMI sources.
They are labelled 1 to 20.
All Leaf True systems accord with the HDMI 1.4 specification and includes support of
3D formats.
Summary of Contents for LT2020E
Page 1: ...LT2020E...
