61
Reference Manual
00809-0100-4024, Rev CA
Electrical Installation
March 2020
Electrical Installation
Passive output (external loop supply)
A handheld terminal or a HART modem should not be connected directly across an external power
supply. Instead, it should be connected across a load resistor of about 250 ohms.
Figure 3-8. Typical Handheld Communicator (Passive Output)
Intrinsically safe conditions
A handheld intrinsically safe communicator can be connected in the hazardous area. The HART interface
must be connected via a zener barrier in the safe area. It is also possible to use an intrinsically safe Ex
classed HART interface which has a built in Zener barrier.
Figure 3-9. Typical Handheld Communicator Connection In Intrinsically Safe Conditions
X1
1
2
3
4
V
s
Junction box
EEx e
Voltage compliance
7-30 V
250
24-240 V
DC/AC 0-60 Hz
10 W
15 VA
Rosemount
5600
Handheld intrinsically
safe communicator
Zener
HART
interface
Analog instrument
and/or DCS system
Содержание Rosemount 5600 Series
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