Lighthouse solair 3100, Operating Manual

Page: 148 / 188

Lighthouse S3100/S5100/Boulder Counter Operating Manual
7-2 248083389-1 Rev
RJ-45 Comm Port
WARNING:
+24VDC
is present on RS-485
Port at Pin 7.
The RJ-45 connector (See Figure 7-1) on the instrument’s RS-485 port
has both RS232 and RS485 lines. The pinouts are as follows:
RS485 Communications
WARNING:
Contact
Lighthouse Technical
Support at 800-945-5905
(USA Toll Free) or 541-
770-5905 (Outside of
USA) for the correct
instrument configuration
BEFORE attempting to use
RS485 COM mode with a
PC. Failure to heed this
warning can result in
damage to PC, instrument
or both.
The instrument uses RS485 as one of its communication modes.
Attaching the instrument to an RS485 network requires special
attention to topology (wiring scheme of network) before and after the
design phase to make sure the SOLAIR 1.0 CFM and other instruments
perform as expected.
A standard Cat5 cable is used to connect the instrument to an RS485
network. Table 7-1 illustrates the RS232/RS485 RJ45 pins and the
signals assigned.
RS232 Communications
The instrument can use RS232 as a communication mode by using the
optional USB to RS232 Converter cable. The cable is connected to the
RJ-45 Comm Port on the Solair and to any USB port on a PC.
Windows will detect that a new hardware device has been attached and
will finalize the installation as needed. This is a routine “registering” of
components that should only take a moment. An additional COM port
will be added to the PC.
Table 7-1 RS232/RS485 - RJ-45 Pinouts
RJ-45 Pin Signal Name
1 RS-232-TX
2 RS-232-RX
3 RESERVED for future use
4 RS-485B
5 RS-485A
6 RESERVED for future use
7 24VDC
8 GND