Electrical Installation - MSA PrimaX IR Manual De Operación

Installation
3.2

Electrical Installation

Instructions for Electrical Connection
WARNING
The device must be installed only in compliance with the applicable
regulations, otherwise it may not operate as intended.
WARNING
Before wiring the device, disconnect or isolate all power connected to
the device; otherwise electric shock could occur.
FAILURE TO FOLLOW THE ABOVE CAN RESULT IN AN UNSAFE
CONDITION AND PERSONS WHO RELY ON THIS PRODUCT FOR
THEIR SAFETY COULD SUSTAIN SEVERE PERSONAL INJURY OR
LOSS OF LIFE.
- Shielded cable for measuring devices is recommended.
- Always observe maximum cable lengths and cross-sections shown below.
- Water or impurities can penetrate the device through the cable. In hazardous
areas, it is recommended to install the cable in a loop just before entry into the
device or to slightly bend it to prevent water from entering.
Wiring Requirements
The device is a three-wire transmitter that operates in the current source mode and
can be wired directly to the input wires or with an optional junction box. The follow-
ing table provides typical cable lengths and wire sizes for installation. The HART
signal requires a load across the signal.
Wire Size vs Distance
Power Supply
Voltage
24 Volts
Proper installation should prevent water and dirt from entering the unit via the wires
or conduit.
16
18 AWG 14 AWG
(1.0mm²) (1.5mm²)
1575 ft (480 m) 2362 ft (720 m)
PrimaX IR
Signal Load
[including termination]
With HART
250  load  500 
Without HART
load  500 
MSA
US