Series M22/M23/M24 Instruction Manual
Chapter 4 Serial Communications
M-000-00010
4-1
Chapter 4 Serial Communications
HART Communications
The HART Communications Protocol (Highway Addressable Remote Trans-
ducer Protocol) is a bidirectional digital serial communications protocol. The
HART signal is based on the Bell 202 standard and is superimposed on 4-20 mA
Output 1. Peer-to-peer (analog / digital) and multi-drop (digital only) modes are
supported.
Wiring
The diagrams below detail the proper connections required for HART
communications:
Loop Powered Meter Wiring
LO
O
P
P
O
W
E
R
+
-
FR
E
Q
O
U
T
P
U
LS
E
O
U
T -
-
+
+
O
P
TI
O
N
A
L
B
A
C
K
LI
G
H
T
P
O
W
E
R
+
-
R load,
250 ohm
minimum
+
_
DC
Power
Supply
Remote Connection
for Communicator
Current
Meter
Field Connection
for Communicator
Vortex Meter
Figure 4-1.Loop Powered Meter Wiring (HART)
Warning!
Place controls in manual
mode when making
configuration changes to
the vortex meter.
Summary of Contents for Pro-T
Page 10: ...Table of Contents Series M22 M23 M24 Instruction Manual 0 10 M 000 00010...
Page 20: ...Chapter 1 Introduction Series M22 M23 M24 Instruction Manual 1 10 M 000 00010...
Page 60: ...Chapter 2 Installation Series M22 M23 M24 Instruction Manual 2 40 M 000 00010...
Page 126: ...Chapter 5 Troubleshooting Repair Series M22 M23 M24 Instruction Manual 5 16 M 000 00010...
Page 140: ...Appendix B Approvals Series M22 M23 M24 Instruction Manual B 4 M 000 00010...
Page 150: ...Appendix D Glossary Series M22 M23 M24 Instruction Manual D 4 M 000 00010...
