Emerson Process Management OXYMITTER 4000 Signal Line Connections, ≥ 250 Ohms Load Resistance

Instruction Manual

IB-106-340C Rev. 4.1 July 2004

Hazardous Area Oxymitter 4000

a. Method 1, For Load Resistance ≥ 250	b. Method 2, For Load Resistance < 250
Ohms	Ohms

Refer to Figure 7-1and 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 seri- ous injury. Do not make connections to the HART Communicator's serial port, 4-20 mV signal line, or NiCad re- charger jack in an explosive atmosphere.

Using the supplied lead set, connect the HART Communicator in parallel with to the Hazardous Area Oxymitter 4000. Use any wiring termination points in the analog out- put 4-20 mA signal line.

Refer to Figure 7-2and 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 seri- ous injury. Do not make connections to the HART Communicator's serial port, 4-20 mA signal line, or NiCad re- charger 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).

AC	L1
AC	N
	RL ≥ 250Ω
+
-
+	4-20 mA SIGNAL LINE

4-20

-

TERMINAL BLOCK

ANALOG OUTPUT DEVICE

LOOP CONNECTORS

SERIAL PORT & BATTERY LOOP CONNECTORS	USE INTERFACE
	00275 0013 ONLY
CHARGER MUST
	SERIAL PORT
NOT BE USED IN
HAZARDOUS AREAS

	HART
	COMMUNICATOR
	LEAD SET
HART COMMUNICATOR
REAR PANEL	23230001

Figure 7-1. Signal Line Connections, ≥ 250 Ohms Load Resistance

7-2 HART/AMS Rosemount Analytical Inc. A Division of Emerson Process Management