LT-1000 User & Installation Manual
Connecting
Lars Thrane A/S
www.thrane.eu
26 of 42
Serial Port (RS-422)
Illustration of a RS-422 interface in between a serial port and the LT-1000 NRU for providing a
communication link for the LT-Service Tool, see Figure 40. The RS-422 interface is balanced and more robust
than an unbalanced serial interface, which is illustrated in Figure 41.
NOTE:
The RS-422 interface is using both Tx and Rx transmission lines (balanced/differential) and is
therefore a more robust communication link than the RS-232 interface. The LT-1000 NRU is
supporting both RS-422 and RS-232 communicating link to the LT-Service Tool.
Serial port (RS-232)
Illustration of a RS-232 interface in between a serial port and the LT-1000 NRU for providing a
communication link for the LT-Service Tool, see Figure 41.
NOTE:
When using the RS-232 (unbalanced) serial communication link, it is important that the RxD+
signal level from the serial port is > 5 VDC for proper operation.
F
IGURE
40:
RS-422
(
BALANCED
)
SERIAL INTERFACE PROVIDING THE COMMUNICATION
LINK IN BETWEEN THE
LT-S
ERVICE
T
OOL AND THE
LT-1000
NRU.
F
IGURE
41:
RS-232
(
UNBALANCED
)
SERIAL
INTERFACE
PROVIDING
THE
COMMUNICATION
LINK
IN
BETWEEN
THE
LT-SERVICE
TOOL
AND
THE
LT-1000
NRU
Summary of Contents for LT-1000 NRU
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