M-system M5CT Instruction Manual
M-system M5CT is a signal conditioner designed to function as soon as power is supplied but requires a warm-up for 10 minutes for satisfying complete performance. It comes with a DIN rail adapter and can be mounted on a 35mm wide DIN rail. The unit is calibrated at the factory to meet the ordered specifications and usually does not need any calibration. The M5CT offers lightning surge protection and is suitable for indoor use in environments with temperatures ranging from -5 to +55°C and relative humidity within 0 to 90% RH. It has screw terminals with a torque of 0.
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INSTRUCTION MANUAL
CT TRANSMITTER
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.
MODEL
M5CT
• Install lightning surge protectors for those wires connected to remote locations. For 24V DC power supply line, choose a surge protector with its maximum surge voltage
40V or less between lines. Recommended M-System model: MDP-D24.
■ AND ....
• The unit is designed to function as soon as power is supplied, however, a warm up for 10 minutes is required for satisfying complete performance described in the data sheet.
COMPONENT IDENTIFICATION
Body
Specifications
Terminal Cover
Power LED
POINTS OF CAUTION
■ CONFORMITY WITH EU DIRECTIVES
• The equipment must be mounted inside a panel.
• Insert a noise filter for the power source connected to the unit. TDK-Lambda Noise Filter Model RSAN-2006 or equivalent is recommended.
• The actual installation environments such as panel configurations, 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 requirements in regard to the whole system and employ additional protective measures to ensure the CE conformity.
INSTALLATION
Span Adj.
Zero Adj.
Set the unit so that its DIN rail adapter is at the bottom.
■ MOUNTING THE UNIT ON A DIN RAIL
A) Hang the upper hook at the rear side of unit on the DIN rail.
B) Push in the lower in keeping pressing the unit to the DIN rail.
■ POWER INPUT RATING & OPERATIONAL RANGE
• Locate the power input rating marked on the product and confirm its operational range as indicated below:
85 – 264V AC rating: 85 – 264V, 47 – 66 Hz, approx. 2 – 3VA
24V DC rating: 24V ±10%, approx. 2W
■ GENERAL PRECAUTIONS
• Before you remove the unit or mount it, turn off the power supply and input signal for safety.
A
B
DIN Rail
■ 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 0 to 90% RH in order to ensure adequate life span and operation.
■ REMOVING THE UNIT
A) Push down the DIN rail adaptor using a minus screwdriver.
B) Pull out the lower part of the unit.
C) Remove the upper part from the DIN rail.
C
■ 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.
Spring Loaded
DIN Rail Adaptor
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: [email protected]
A
B
EM-2487 Rev.5 P. 1 / 2
TERMINAL CONNECTIONS
Connect the unit as in the diagram below or refer to the connection diagram on the front of the unit.
■ EXTERNAL DIMENSIONS unit: mm (inch)
7.3 (.29)
8–M3.5 SCREW
1 2
3 4
DIN RAIL
35mm wide
M5CT
ADJUSTMENT PROCEDURE
This unit is calibrated at the factory to meet the ordered specifications, therefore you usually do not need any calibration.
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 SIGNAL
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 10% input and adjust output to 10%.
2) SPAN: Apply 100% input and adjust output to 100%.
3) Check ZERO adjustment again with 10% input.
4) When ZERO value is changed, repeat the above procedure 1) – 3).
5 6
7 8
25 (.98) 41 (1.61) [3.3 (.13)]
• When mounting, no extra space is needed between units.
■ CONNECTION DIAGRAM
SOURCE
K
L
LOAD l k
CT
(A)
3
(±)
4
5 +
6 –
7 U(+)
8 V(–)
OUTPUT
POWER
MAINTENANCE
Regular calibration procedure is explained below:
■ CALIBRATION
Warm up the unit for at least 10 minutes. Apply 10%, 25%,
50%, 75% and 100% input signal. 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, 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.
WIRING INSTRUCTIONS
■ SCREW TERMINAL
Torque: 0.8 N·m
CHECKING
1) Terminal wiring: Check that all cables are correctly connected 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 5 – 120% of the full-scale.
Be sure to short the secondary side of CT or turn off the current at its primary side for preventing the CT from burning when the cables are to be disconnected from input terminals.
4) Output: Check that the load resistance meets the described specifications.
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: +81(6)6659-8201 Fax: +81(6)6659-8510 E-mail: [email protected]
EM-2487 Rev.5 P. 2 / 2

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