Megmeet MC100 Series User Manual

MC100-2PT/4PT Thermal Resistance Module User Manual
Thank you for using MC100 series PLC. Before using the product,
please carefully read this manual so as to better understand it, fully use it,
and ensure safety. This quick start manual is to offer you a quick guide to the
design, installation, connection and maintenance of MC100 series PLC,
convenient for on-site reference.
This manual is for the following MC100 series members:
MC100-2PT Thermal Resistance Module
MC100-4PT Thermal Resistance Module
Version：V1.2
Revision Date：2010-01-15
BOM Code：R29090039
For detailed product information, please refer to MC100 Series PLC
User Manual , X-Builder Programming
MC200/MC100 Series PLC Programming Reference Manual . For ordering the
above user manuals, contact your Megmeet distributor or sales office.
1. Appearance and Part Names
Fig. 1-1 Appearance and part name
2. Installation Description
2.1 Installation method
The PLC must be installed horizontally on the backplane of the
electrical cabinet, and maintain a distance of more than 20cm from the
peripheral equipment or cabinet wall. The installation in other directions is
not conducive to the PLC heat dissipation, and there can be no heating
equipment under the PLC. As shown in the picture below:
DIN rail mounting
Generally, you can mount the PLC onto a 35mm-wide rail (DIN). Open
the DIN snap-fit at the bottom of the module and lock the bottom of the
module onto the DIN rail; Rotate module close to the DIN guide rail and close
the DIN snap-fit with a double-checking.
Screw fixing
Fixing the PLC with screws can stand greater shock than DIN rail
mounting. M3 screws can be chosen to fix the PLC onto the backboard of the
Software User Manual ,
and
electric cabinet through the mounting holes on PLC enclosure, as the
following figure.
2.2 Cable connection and specification
It is recommended to use
prefabricate insulated plugs to ensure connection quality. The following
table lists the sectional areas and models of the recommended cables.
Cable
AC power line（L、N）
Ground line
Input signal (X)
Input signal (Y)
Fix the prepared cable head onto the PLC terminals with screws
correctly. Fastening torque: 0.5~0.8Nm.
◆For the safety (to prevent electric shock and fire accidents) and lower
noise, the ground terminal of the controller should be connected in
accordance with the requirements from national electrical regulations, and
the ground resistance should be less than 100 Ω . Single point grounding
should be used when wiring multiple controllers, and the ground wire cannot
form a loop. As shown in the diagram below:
×
Note for wiring:
1. It is recommended to use a shielded twisted-pair cable for thermal
resistance input. The cable should be far away from power cable or other
cables that may generate electrical power interference.
1) The thermal resistance sensor (Pt100, Cu100 or Cu50) can use 2-, 3-, or
4-wire system, with a ascending measurement precision. When the cable is
longer than 10m, the 4-wire system is recommended.
2) To reduce the measurement error and avoid EMI, the cable should be
shorter than 100 meters. The measurement error is due to the connecting
stranded copper conductors and
Recommended NO. Cross-Section
AWG12/AWG18 1.0—2.0mm
AWG12 2.0mm
AWG18/AWG20 0.8—1.0mm
AWG18/AWG20 0.8—1.0mm
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2
2
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