Emerson MICRO MOTION 1500, Configuration And Use Manual, Page: 32 / 282

22 Micro Motion Series 1000 and Series 2000 Transmitters
Connecting with ProLink II or Pocket ProLink Software
5. Add resistance as required. The Viator HART interface must be connected across a resistance
of 250–600
Ω
. In addition, if you are using an IS transmitter, the primary mA output requires
an external power supply with a minimum of 250
Ω
and 17.5 volts (see Figure 3-6). To meet
the resistance requirements, you may use any combination of resistors R1, R2, and R3 (see
Figure 3-4 or 3-5).
Figure 3-6 Model 1700/2700 IS: Resistance and voltage requirements for HART/Bell 202 connections
6. Start ProLink II. Choose
Connection > Connect to Device
.
7. Set
Protocol
to HART Bell 202.
Baud rate
,
Stop bits
, and
Parity
are automatically set to the
values required by HART protocol.
8. Set the
Address/Tag
value to the HART polling address configured for the transmitter. The
default HART polling address is 0. See Section 8.15 for information on the HART polling
address.
9. Set the
COM Port
value to th e PC COM port assigned to this connection.
10. Set
Master
as appropriate:
• If another host such as a DCS is on the network, set
Master
to Secondary.
• If no other host is on the network, set
Master
to Primary.
Note: The 275 HART Communicator or 375 Field Communicator is not a host.
11. Click
Connect
.
R
max
= (V
supply
– 12)/0.023
A minimum of 250 ohms and 17.5 volts is required
Supply voltage VDC (Volts)
Exter
nal resistance
(O
hms)
Operating range
12 30 14 16 18 20 22 24 26 28
0
1000
900
800
700
600
500
400
300
200
100