MODEL 485OI9TB-24V
RS232/RS485 Converter
Converts RS485 signals from a TFT32 Transmitter to RS232 for connection to a PC Computer or
Modem.
– DB9 RS232 Connector plugs directly into your computer’s
COM port
– Optically isolates and protects your computer’s RS232 port
– Terminal block for RS485 connections
– Operates from 2400 up to 19.2K baud
– Terminal connections are provided for RS485 D-, D+, 24V
and GND
Terminal connections are provided for RS485 Data – (D*), Data + (D),and RS485 power and ground.
The RS485 side of the converter is internally biased and terminated to operate with a RS485 network of
up to 32 devices.
TFT32 Tank Farm Transmitter
Manual Series 2.4
Page 29
TO PC
COM PORT
or MODEM
CABLE
FROM GREYLINE
TRANSMITTER
WITH RS485 OUTPUT
(OPTION RS5)
OR
FROM GREYLINE
TFT TRANSMITTERS
IN RS485 NETWORK
D* (D-)
D (D+)
DATA*
DATA
GND
DO NOT CONNECT CABLE SHIELD
485OI9TB-12V
D–
D+
GND
12V
RS4
8
5
DB
9
F
R
S
232
S.G.
