Black Box IC108A Guia do Utilizador Página 48

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Advant
®
Smart Device (HART
®
) Interface User’s Guide
Chapter 2 Installation
2-36 3BUR 001 085R0001 REV A
The field wiring for the 6231B or 6235B Current Source Analog Blocks require an additional
150 ohm 1% 5W resistor for each smart device connected to the block. The resistor should be
installed between its SHIM Signal+ and TRIO block IN contacts.
Figure 2-27. Smart Device Wired to a TRIO 6231B or 6235B Analog Block
P
SMT
XMT
+
-
+
-
24 V dc
P
6231B or 6235B
EXC
IN
P
Analog Block
100
COM
P
Tx
Rx
SHIM
Sig+
RS-232
Sig-
HART Bus
Power Supply
47
24 V dc
150
150 ohm resistor
added to loop
resistance
P
P
SMT
XMT
+
-
+
-
24 V dc
P
6231B or 6235B
EXC
IN
P
Analog Block
100
COM
P
SHIM
Sig+
Sig-
HART Bus
Power Supply
47
24 V dc
150
150 ohm resistor
added to loop
resistance
P
RS-485
MVI
port
RS-232
to
RS-485
Conv.
RS-232
D+
D-
Daisy Chain
to next SHIM
TRIO
Field
bus
Advant Controller
MVI
port
TRIO
Field
bus
Advant Controller
Marshalling Strip
Marshalling Strip
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