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6-1. Parts to be Procured Locally
Prepare the following parts to install this device.
[Parts to be Purchased Separately]
[Recommended Pulse Specifications]
Prepare a measuring instrument that measures the type of pulse signals indicated in table below.
6 Installation Method
Required Part Specification
Unit fixing screws M4 screw × 4
Power supply for this
unit
Power source: 24 VDC 0.2 A (Minimum loading), SELV circuit, power line with grounding terminal
Ripple noise: Lower than 200 mVp-p
Compatible specification
Authorized or CE marked products
Subject to regulations: - IEC60950 (or EN60950)
- CISPR22/24 (or EN55022/24)
- IEC61000-3-2/3-3 (or EN61000-3-2/3-3)
Power line
Use a sheathed vinyl cord or cable.
At least 0.75 mm² (AWG18)
M-NET transmission
line
Type of the cable: Sheathed vinyl cords or cable which comply with the following specifications or equivalent.
• CPEV Φ1.2 mm to Φ1.6 mm • CVVS 1.25 mm² to 2 mm² (AWG16 to 14)
* CPEV: PE insulated PVC jacketed shielded communication cable
* CVVS: PVC insulated PVC jacketed shielded control cable
PE: Polyethylene PVC: Polyvinyl choloride
Power needs to be supplied to the M-NET circuitry of this device. Use an outdoor unit or a separately purchased
power supply unit for the transmission line.
Signal lines
Shows the size of the electric wire (copper wire) that is adapted to the terminal block of this device.
Electric wire size ········· (1) Solid wire: Φ0.65 mm (AWG21) - Φ1.2 mm (AWG16)
(2) Stranded wire: 0.75 mm² (AWG18) - 1.25 mm² (AWG16)
Single strand: At least Φ0.18 mm
Name Model Application Remark
Power supply unit PAC-SC50KUA Power supply to the M-NET transmission line
This is not required when power is to be
supplied from an outdoor unit.
Type Specifications
Output pulse relay
method
Semiconductor relay method
Output pulse width
100 ~ 300 ms (100 ms and above)
Choose an instrument that outputs non-voltage a-contact
point pulse per each pulse output.
Pulse unit
Watt-hour meter: 0.1 kWh/pulse, 1 kWh/pulse recommended
Water meter: m
3
/pulse
Gas meter: m
3
/pulse
Calorimeter: MJ/pulse
* Except for the watt-hour meter, select instruments that take measurements in the appropriate pulse unit.
ON
100 ~ 300 ms