HF scientific Micro200BW Turbidimeter - 0-100 NTU - Manual (Page 54)

MICRO 200 BW 0-10 & 0-100 NTU (05/05)
Rev. 3.4
Page 42
UNITS
INTERVENING
LAST
VOLTAGE
RS232
1ST OR HUB
VOLTAGE
RS232
1 8 4 5
TXD
S
H
I
E
L
D
GRD RXD RXD GRD
D
L
E
I
H
S
TXD
TXD
GRD
RXD
CPU
HOST
5 4 8 1
ADDRESS #N ADDRESS #1
OR STAR
"BUS" OR "BACKBONE"
Figure 24
RS-232 Voltage Connection
Figure 25
RS-485 Connection
UNITS
INTERVENING
RS485 RS485
CPU
HOST
RS485
GRD
G
R
D
G
RD
G
R
D
ADDRESS #1 ADDRESS #N
1ST OF HUB
OR STAR
LAST
(SHIELD)
A
A
A A A
A
B
B
B B B
B