IB-106-340
7-2
a.
Method 1, For Load Resistance > 250 Ohms.
Refer to Figure 7-1 and the following steps to
connect the HART Communicator to a signal line
250 ohms or more of load resistance.
Explosions can result in death or serious
injury. Do not make connections to the
HART Communicator's serial port, 4-
20 mV signal line, or NiCad recharger jack
in an explosive atmosphere.
Using the supplied lead set, connect the HART
Communicator in parallel to the Oxymitter 4000.
Use any wiring termination points in the analog
output 4-20 mA signal line.
b.
Method 2, For Load Resistance < 250 Ohms.
Refer to Figure 7-2 and the following steps to
connect the HART Communicator to a signal line
with less than 250 ohms load resistance.
Explosions can result in death or serious
injury. Do not make connections to the
HART Communicator's serial port, 4-20
mA signal line, or NiCad recharger jack in
an explosive atmosphere.
1. At a convenient point, break the analog
output 4-20 mA signal line and install the
optional 250 ohm load resistor.
2. Plug the load resistor into the loop connectors
(located on the rear panel of the HART
Communicator).
7-3.
HART COMMUNICATOR PC CONNEC-
TIONS. There is an option to interface the HART
Communicator with a personal computer. Load the
designated AMS software into the PC. Then link the
HART Communicator to the PC using the interface PC
adapter that connects to the serial port (on the commu-
nicator rear panel).
Refer to the proper HART Communicator
documentation in regard to the PC interface option.
LOOP CONNECTORS
USE INTERFACE
00275 0013 ONLY
SERIAL PORT & BATTERY
CHARGER MUST
NOT BE USED IN
HAZARDOUS AREAS
SERIAL PORT
AC L1
AC N
+
+
-
-
4-20
TERMINAL BLOCK
LOOP CONNECTORS
4-20 mA SIGNAL LINE
HART
COMMUNICATOR
RL < 250
Ω
ANALOG OUTPUT DEVICE
250 OHM
LOAD
RESISTOR
(NOTE 1)
HART COMMUNICATOR
REAR PANEL
NOTE: THE SIGNAL LOOP MUST BE BROKEN
TO INSERT THE OPTIONAL 250 OHM
LOAD RESISTOR.
23230002
Figure 7-2. Signal Line Connections, < 250 Ohms Lead Resistance
Summary of Contents for Oxymitter 4000
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