M-system 18KDYH2 User manual

5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-0430 Rev.2 P. 1 / 4
INSTRUCTION MANUAL
CURRENT LOOP SUPPLY
(applicable to HART signal, opencircuit detection selectable)
MODEL 18KDYH2
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)
■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:
24V DC rating: 24V ±10%, approx. 120mA
■GENERAL PRECAUTIONS
• 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
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
Body
Specifications
Front Cover
(Connection diagram
behind)
■FRONT VIEW (with cover open)
Span Adj.
Zero Adj.
1
78
56
2
34
INSTALLATION
Use Standard Rack (model: 18KBXx).

18KDYH2
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-0430 Rev.2 P. 2 / 4
TERMINAL CONNECTIONS
Connect the unit as in the diagram below or refer to the connection diagram behind the front cover.
■EXTERNAL DIMENSIONS unit: mm (inch)
110 (4.33 )
93 (3.66)
24 (.94)
7 (.28)
78 (3.07)32 (1.26)
8–M3.5
SCREW
7 (.28)
2–M3
SCREW

18KDYH2
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-0430 Rev.2 P. 3 / 4
■CONNECTION DIAGRAM
• OUTPUT CODE: 6A
2-WIRE
XMTR
250Ω
INPUT
3
2
1
+
−
Note 1: Use either of module or external field terminals.
Note 2: For OUTPUT 2, use either of terminals on the front or connector on the rear.
*1. Hand-held communicator
■ When used as Isolator
■ When used as DC Supply
Section A. Field Terminals
2
1
3
−
+
+
–
1
5
6
3
2
OUTPUT 2
+
−
4 – 20mA DC
*1
HHC
R
L
OUTPUT 2
OUTPUT 1
POWER
*1
HHC
*1
HHC
+
+
Module
Field Terminals
(Section A)
CONNECTOR
External
Field Terminals
(Section A)
• OUTPUT CODE: A6, AA
2-WIRE
XMTR
250Ω
INPUT
3
2
1
+
−
Note 1: Use either of module or external field terminals.
Note 2: For OUTPUT 2, use either of terminals on the front or connector on the rear.
*1. Hand-held communicator
■ When used as Isolator
■ When used as DC Supply
Section A. Field Terminals
2
1
3
−
+
+
–
1
5
6
3
2
OUTPUT 2
+
−
(HHC *1)
OUTPUT 2
OUTPUT 1
POWER
*1
HHC
*1
HHC
+
+
Module
Field Terminals
(Section A)
CONNECTOR
External
Field Terminals
(Section A)

18KDYH2
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-0430 Rev.2 P. 4 / 4
■TERMINAL ASSIGNMENTS
12
34
78
56
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 supplied to the rack
(model: 18KBXx). For the DC power source, be sure that
the ripple level is within 10% p-p.
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. For HART communication, the re-
sistance must be 250 Ω ±10%.
ADJUSTMENT PROCEDURE
This unit is calibrated at the factory to meet the ordered
specifications, therefore you usually do not need any cali-
bration.
For matching the signal to a receiving instrument or in case
of regular calibration, adjust the output as explained in the
following.
■HOW TO CALIBRATE THE OUTPUT 1
Use a signal source and measuring instruments of sufficient
accuracy level. Turn the power supply on and warm up for
more than 10 minutes.
1) ZERO: Apply 0% input and adjust output to 0%.
2) SPAN: Apply 100% input and adjust output to 100%.
3) Check ZERO adjustment again with 0% input.
4) When ZERO value is changed, repeat the above proce-
dure 1) – 3).
5) No need of adjustments for the Output 2.
MAINTENANCE
Regular calibration procedure is explained below:
■CALIBRATION
Warm up the unit for at least 10 minutes. Apply 0%, 25%,
50%, 75% and 100% input signal. Check that the output
signal for the respective input signal remains within accu-
racy described in the data sheet. When the output is out of
tolerance, recalibrate the unit according to the “ADJUST-
MENT PROCEDURE” explained earlier.
LIGHTNING SURGE PROTECTION
M-System offers a series of lightning surge protector for
protection against induced lightning surges. Please contact
M-System to choose appropriate models.