MG FRT User manual

EM-1447 Rev.3 P. 1 / 3
MG CO., LTD. www.mgco.jp
5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
INSTRUCTION MANUAL
RATIO/BIAS TRANSMITTER
(output bias) MODEL FRT/FRTS
BEFORE USE ....
Thank you for choosing us. Before use, please check con-
tents of the package you received as outlined below.
If you have any problems or questions with the product,
please contact our sales office or representatives.
■PACKAGE INCLUDES:
Signal conditioner
(body + base socket + input resistor)..................................(1)
Input resistor is provided only with current input type.
■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.
POINTS OF CAUTION
■POWER INPUT RATING & OPERATIONAL RANGE
• Locate the power input rating marked on the product and
confirm its operational range as indicated below:
85 – 132V AC rating: 85 – 132V, 47 – 66 Hz,
approx. 4.5VA
170 – 264V AC rating: 170 – 264V, 47 – 66 Hz,
approx. 4.5VA
24V DC rating: 24V ±10%, approx. 80mA
110V DC rating: 85 – 150V, approx. 20mA
■GENERAL PRECAUTIONS
• Before you remove the unit from its base socket 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
ventilation.
• Do not install the unit where it is subjected to continuous
vibration. Do not subject the unit to physical impact.
• Environmental temperature must be within -5 to +55°C
(23 to 131°F) with relative humidity within 30 to 90% RH
in order to ensure adequate life span and operation.
■WIRING
• Do not install cables 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
Input Resistor
Body
Base Socket
Specifications
Connection
Diagram
(side)
INSTALLATION
Pull out the body in pressing the clamps located at the top
and bottom of the unit for separate the body from the base
socket.
■DIN RAIL MOUNTING
DIN Rail
35mm wide
Spring Loaded
DIN Rail Adaptor
Set the base socket so that
its DIN rail adaptor is at
the bottom. Hang the upper
hook at the rear side of base
socket on the DIN rail and
push in the lower. When
removing the socket, push
down the DIN rail adaptor
utilizing a minus screwdriv-
er and pull.
■WALL MOUNTING
Refer to “EXTERNAL DIMENSIONS.”

FRT / FRTS
EM-1447 Rev.3 P. 2 / 3
MG CO., LTD. www.mgco.jp
5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
TERMINAL CONNECTIONS
Connect the unit as in the diagram below or refer to the connection diagram on the side of the unit.
When an input resistor is provided with the module, attach it together with input wiring to the input screw terminals.
■EXTERNAL DIMENSIONS unit: mm (inch)
12
34
7
6
8
5
26 (1.02)
93 (3.66)
15
(.59)
2–4.5 (.18)
HOLE
15 (.59) deep
8–M3.5
SCREW
7.8 (.31)
107 (4.21)
DIN RAIL
35mm wide
[3.3 (.13)]
CLAMP
(top & bottom)
137 (5.39)
•When mounting, no extra space is needed between units.
26 (1.02)
100 (3.94)
■CONNECTION DIAGRAM
+
–
*
*Input shunt resistor attached for current input.
INPUT
1
R
2
+
–
U(+)
V(–)
POWER
OUTPUT
5
6
7
8
■TERMINAL ASSIGNMENTS unit: mm (inch)
34
7
6
8
5
12
INPUT RESISTOR
(model: REM)
19 (.75)
Input shunt resistor attached
for current input.

FRT / FRTS
EM-1447 Rev.3 P. 3 / 3
MG CO., LTD. www.mgco.jp
5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
WIRING INSTRUCTIONS
■SCREW TERMINAL
Torque: 0.8 N·m
CHECKING
1) Terminal wiring: Check that all cables are correctly con-
nected according to the connection diagram.
2) Power input voltage: Check voltage across the terminal
7 – 8 with a multimeter.
3) Input: Check that the input signal is within 0 – 100% of
the full-scale.
4) Output: Check that the load resistance meets the de-
scribed specifications.
ADJUSTMENT PROCEDURE
This unit is calibrated at the factory to meet the ordered
specifications and within the described accuracy.
Adjustment procedure is as follows:
Ratio Monitor (+)
Bias Monitor (+)
COM. (–)
Ratio Adj.
Bias Adj.
• Ratio: Turn the ratioadjustment checking voltage across
the monitor terminals (providing 0.5 – 3V for full scale
ratio 0.5 – 3.0).
• Bias: Turn the bias adjustment checking voltage across
the monitor terminals (providing -1 to +1V for bias -100
to + 100%).
Use test leads of 2.00 mm dia. for Ratio, Bias, COM termi-
nals.
Ratio is factory set to 1 and bias to 0%.
EQUATION
Xo = KXi + B
where Xo : Output (%)
K: Ratio (linear characteristics 0.5 to 3)
Xi : Input (approx. -10 to +120%)
B: Bias (-100 to +100%)
MAINTENANCE
Regular calibration procedure is explained below:
■CALIBRATION
Warm up the unit for at least 10 minutes. Apply the input
signals which should lead the calculated results as 0%, 25%,
50%, 75% and 100%. Check that the output signal for the
respective input signal remains within accuracy described
in the data sheet. When the output is out of tolerance, re-
calibrate the unit according to the “ADJUSTMENT PRO-
CEDURE” explained earlier.
LIGHTNING SURGE PROTECTION
We offer a series of lightning surge protector for protec-
tion against induced lightning surges. Please contact us to
choose appropriate models.