2 0 . 2 m m
+
-
+
-
ø 6 mm
33 mm
ø 44 mm
12
5335V116-UK
CONNECTION OF TRANSMITTERS IN
MULTIDROP MODE
The
HART
®
communicator or a PC modem can be connected accross AB or BC.
The outputs of max. 15 transmitters can be connected in parallel for a digital
HART
®
communication on 2-wires.
Before it is connected, each transmitter must be configured with a unique number
from 1 to 15. If 2 transmitters are configured with the same number, both will
be excluded. The transmitters must be programmed for multidrop mode (with a
fixed output signal of 4 mA). Maximum current in the loop is therefore 60 mA.
The communication is either by means of a HART
®
communicator or a HART
®
modem.
The PReset PC configuration software can configure the individual transmitter for
multidrop mode and provide it with a unique polling address.
Mechanical specifications
Mounting of sensor wires
R
A
B
C
PRetop
5335
+
-
+
-
PRetop
5335
PRetop
5335
Power
supply
Max. 15 transmitters
R
load
>
250
Ω
,
<
1100
Ω
Wires must be mounted between the metal
plates.
