DIAL-UP LOCATION CONNECTIONS
TFT32 Tank Farm Transmitter
Manual Series 2.4
Page 6
IMPORTANT:
MUST CONNECT TO A
GOOD GROUND (<1 Ohm)
WITH 14 AWG CONDUCTOR
6 - CONDUCTOR SHIELDED
18 - 22 AWG RECOMMENDED
RELAY
(1 AMP)
RS485
D
D
S.
G
*
24VDC
+
–
GN
D
120 ohm
TERMINATOR
(supplied)
TO RS485
NETWORK
LAST (FURTHEST) TFT IN THE NETWORK
MORE
TFT'S
RE
D
BL
K
IMPORTANT:
MUST CONNECT TO A
GOOD GROUND (<1 Ohm)
WITH 14 AWG CONDUCTOR
6 - CONDUCTOR SHIELDED
18 - 22 AWG RECOMMENDED
RELAY
(1 AMP)
RS485
D
D
S.
G
*
24VDC
+
–
GN
D
RED
BL
K
SENSOR
TO RS485
NETWORK
MORE
TFT'S
DO NOT
CONNECT SHIELD
115VAC
N L
SHIELD
D*
D
24V+
24V-
PS150 POWER SUPPLY
S+ V+ V+ V+ V- V- V- S-
NULL
MODEM
MODEM
SENSOR
DO NOT
CONNECT
SHIELD
INPUT
mA
+ -
INPUT
mA
+ -
RS485/232
CONVERTER
485OI9TB-12V
D–
D+
GND
12V
RS4
8
5
DB
9
F
R
S
232
DB9M
DB25M
GND