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5
Example of System Configuration
Power supply unit
PAC-SC50KUA
G-50A or GB-50A
LAN
G(B)-50A Web
or
TG-2000A
Note: For the shield ground of the M-NET centralized control line, use single-point grounding at the power unit for the transmission line.
However, when supplying electric power to the transmission line for central control from the R410A series outdoor unit without
using a power supply unit for the transmission line, use single-point grounding at the TB7 of that outdoor unit.
Furthermore, when connecting this device to the M-NET indoor control line, use grounding at the TB3 for each outdoor unit
system.
If this device is connected to an indoor/outdoor transmission line and the outdoor unit is down because, for example, the power
supply is interrupted for servicing or there is a failure, the AI controller cannot be set and monitored from the system controller.
6
Installation Method
6-1. Parts to be Procured Locally
Prepare the following parts to install this device.
Required Part
Unit fixing screws
M4 screw × 4
Power source: 24 VDC±10% 0.2 A (Minimum loading), SELV circuit, power line with grounding terminal
Power supply for this
unit
A separate power supply for sensors may be required.
Power supply for
In the case of 24 VDC voltage, the capacity of the power supply for this unit can be increased so that the power
sensors
supply can be shared.
Use a sheathed vinyl cord or cable.
Power 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 (AWG 16 to 14)
M-NET transmission
line
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.
Shows the size of the electric wire (copper wire) that is adapted to the terminal block of this device. Refer to the
usage and cautionary items of the sensor when performing settings. However, use a line with shielded line.
Signal lines
(Sensor input lines)
[Parts to be Purchased Separately]
Name
Power supply unit
PAC-SC50KUA
Centralized control line
M-NET
TB7
TB3
24 VDC Power
AI controller
(3) (4)
(1)
(2)
Temperature sensor,
humidity sensor, etc.
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)
At least 0.75 mm² (AWG18)
* CPEV: PE insulated PVC jacketed shielded communication cable
* CVVS: PVC insulated PVC jacketed shielded control cable
PE: Polyethylene
PVC: Polyvinyl chloride
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)
Model
Power supply to the M-NET transmission line
(1) Channel 1 temperature or humidity sensor input
(2) Channel 2 temperature or humidity sensor input
(3) Channel 1 upper/lower limit alarm output
(4) Channel 2 upper/lower limit alarm output
<Restrictions>
Maximum of 50 units per G(B)-50A
However, the number of units that can be connected to a
(B)
G
-50A is up to 50 including this device, an indoor unit,
Lossnay unit, etc.
Indoor control line
M-NET
City Multi
Supply
* This figure omits the power supply line and only shows the transmission line.
Specification
Single strand: At least Φ0.18 mm
Application
3
AI controller
(3) (4)
(1)
(2)
Temperature sensor,
humidity sensor, etc.
Remark
This is not required when power is to be
supplied from an outdoor unit.
24 VDC Power
Supply
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