Emerson 3081FG - Manual (Page 49)

Instruction Manual
IB-106-3081 Rev. 1.5
September 2002
Rosemount Analytical Inc. A Division of Emerson Process Management HART/AMS 4-3
Model 3081FG
LOOP CONNECTORS USE INTERFACE
00275 0013 ONLY SERIAL PORT & BATTERY
CHARGER MUST
NOT BE USED IN
HAZARDOUS AREAS
SERIAL PORT
LOOP CONNECTORS
4-20 mA SIGNAL LINE
HART
COMMUNICATOR
RL < 250 Ω
ANALOG OUTPUT DEVICE
250 OHM
LOAD
RESISTOR
(SEE NOTE)
HART COMMUNICATOR
REAR PANEL
NOTE: THE SIGNAL LOOP MUST BE BROKEN
TO INSERT THE OPTIONAL 250 OHM
LOAD RESISTOR.
MODEL 3081 TRANSMITTER
TERMINAL BLOCK
12
3
5
6
7
8 9
11
12
13
14
15
16
10
4
+
4-20 mA
26020041
Figure 4-2. Signal Line Connections, < 250 Ohms Lead Resistance
4-3 HART COMMUNICATOR PC
CONNECTIONS
There is an option to interface the HART Com-
municator with a personal computer. Load the
designated AMS software into the PC. Link the
HART Communicator to the PC using the inter-
face PC adapter that connects to the serial port
(on the communicator rear panel).
Refer to the proper HART Communicator docu-
mentation in regard to the PC interface option.
4-4 OFF-LINE AND ON-LINE OPERATIONS
The HART Communicator can be operated both
off-line and on-line.
a. Off-line operations are those in which the
communicator is not connected to the Two-
Wire In Situ Oxygen Analyzer. Off-line op-
erations can include interfacing the HART
Communicator with a PC. (Refer to applica-
ble HART documentation regarding
HART/PC applications.)
b. In the on-line mode, the communicator is
connected to the 4-20 mA analog output
signal line. The communicator is connected
in parallel to the Two-Wire In Situ Oxygen
Analyzer or in parallel to the 250 ohm load
resistor.
c. The opening menu displayed on the HART
LCD is different for on-line and off-line op-
erations. When powering up a disconnected
(off-line) communicator, the HART LCD will
display the Main Menu. When powering up
a connected (on-line) communicator, the
HART LCD will display the On-line Menu.
Refer to the HART Communicator manual
for detailed menu information.
4-5 MENU TREE FOR HART COMMUNICATOR/
TWO-WIRE IN SITU OXYGEN ANALYZER
APPLICATIONS
This section consists of a menu tree for the
HART Communicator (Figure 4-3). This menu is
specific to Two-Wire In Situ Oxygen Analyzer
applications.
4