Emerson 3081FG Method 2, For Load Resistance 250 Ohms, Analog Output Device Loop Connectors

Instruction Manual

IB-106-3081 Rev. 1.5 September 2002

Model 3081FG

6	7	8	9	10	11
5						12
4						13
3						14
2			4-20 mA			15
1						16
					+

MODEL 3081 TRANSMITTER

TERMINAL BLOCK

RL 250

4-20 mA SIGNAL LINE

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	26020040

Figure 4-1. Signal Line Connections, > 250 Ohms Lead Resistance

a.Method 1, For Load Resistance ≥ 250

Ohms

Refer to Figure 4-1 and the following in- struction to connect the HART Communi- cator to a signal line with 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 to the Two- Wire In Situ Oxygen Analyzer. Use any wir- ing termination points in the analog output 4-20 mA signal line.

b.Method 2, For Load Resistance < 250 Ohms

Refer to Figure 4-2and 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).

4-2 HART/AMS Rosemount Analytical Inc. A Division of Emerson Process Management