B3HU
P. 1 / 3
EM-7502-A Rev.3
2-WIRE UNIVERSAL TEMPERATURE TRANSMITTER
(HART communication, intrinsically safe)
MODEL
B3HU
INSTRUCTION MANUAL
BEFORE USE ....
Thank you for choosing M-System. Before use, please check
contents of the package you received as outlined below.
If you have any problems or questions with the product,
please contact M-System’s Sales Office or representatives.
■
PACKAGE INCLUDES:
Signal conditioner ......................................................... (1)
Shortcircuit bar ............................................................ (1)
Terminal block with CJC sensor .................................. (1)
CD including the configuration software .................... (1)
I/O range and tag name label sheet ............................ (1)
■
MODEL NO.
Confirm Model No. marking on the product to be exactly
what you ordered.
■
INSTRUCTION MANUAL
This manual describes necessary points of caution when
you use this product, including installation, connection and
basic maintenance procedures.
When using this product in potentially explosive atmos-
phere or hazardous (classified) location, you have to follow
the safety procedure to install it. Please refer to “SAFE IN-
STALLATION MANUAL” for each type of certification.
POINTS OF CAUTION
The following are general precautions when using this unit.
The safety features and precautions specific to the hazard-
ous locations are explained in “Safe Installation Manual”
for each certification.
■
CONFORMITY WITH EC DIRECTIVES
• Functional insulation is maintained between the input
and output.
• The equipment must be mounted inside a panel.
• The actual installation environments such as panel con-
figurations, connected devices, connected wires, may affect
the protection level of this unit when it is integrated in a
panel system. The user may have to review the CE require-
ments in regard to the whole system and employ additional
protective measures to ensure the CE conformity.
■
SAFETY PRECAUTION
• Before you remove the unit or mount it, turn off the power
supply and input signal for safety.
■
ENVIRONMENT
• Indoor use
• When heavy dust or metal particles are present in the air,
install the unit inside proper housing with sufficient ven-
tilation.
• Do not install the unit where it is subjected to continuous
vibration. Do not subject the unit to physical impact.
• Environmental (non-hazardous location) temperature
must be within -40 to +85°C (-40 to +185°F) with relative
humidity within 0 to 95% RH in order to ensure adequate
life span and operation.
• Be sure that the ventilation slits are not covered with ca-
bles, etc.
■
WIRING
• Do not install cables (input and output) close to noise
sources (relay drive cable, high frequency line, etc.).
• Do not bind these cables together with those in which
noises are present. Do not install them in the same duct.
■
AND ....
• The unit is designed to function as soon as power is sup-
plied, however, a warm up for 10 minutes is required for
satisfying complete performance described in the data
sheet.
COMPONENT IDENTIFICATION
Body
Specifications
(side)
Safety Specifications
(for hazardous locations)
■
HOW TO SEPARATE THE TERMINAL BLOCKS
When you need to separate the terminal blocks from the
transmitter body for wiring, insert a minus driver between
the terminal block and the housing body, pull up the driver
and pull out the terminal block.
■
RTD/RESISTANCE SHORTCIRCUIT BAR
For a RTD/resistance input with 2- or 3-wire connection,
short across the terminals 1 and 2 with the shortcircuit bar
included in the product package. Remove it for other in-
puts/connection.
Terminal Block
Terminal No.
2 3
1
Shortcircuit Bar
■
CJC SENSOR TERMINAL BLOCK
For a thermocouple input, replace the Terminal Block (4 – 5
– 6) with the one connected with the CJC Sensor included
in the package. Be careful not to separate the Sensor from
the terminal block. If you did, connect the CJC leg marked
with a white dot to the terminal 5 and the other leg to the
terminal 6.
The CJC Sensor is calibrated to a particular unit and not
interchangeable with another. Match the Serial No. of the
unit and the sensor.
CJC Sensor Terminal Block
White Dot
Serial No.
For a thermocouple input, replace the Terminal
Block (4 – 5 – 6) with the one connected with
the CJC Sensor included in the package.
Be careful not to separate the Sensor from the
terminal block. If you did, connect the CJC leg
marked with a white dot to the terminal 5 and
the other leg to the terminal 6.
The CJC Sensor is calibrated to a particular
unit and not interchangeable with another.
Match the Serial No. of the unit and the sensor.
