16
6337V100-IN
CoNNECTIoN oF TRANSMITTERS
IN MULTIDRoP MoDE
• The HART
®
communicator or a PC modem can be connected accross AB or
BC.
• The outputs of max. 63 transmitters can be conected 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 63. 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 252 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.
R
A
B
C
PRetrans
6337
PRetrans
6337
PRetrans
6337
+
-
+
-
Power
supply
R
load
>
250
ohm,
<
1100 ohm
Max. 63 channels
