Installation Method; Part Prepared At Site; Allowable Length Of M-Net Transmission Lines - Mitsubishi Electric GB-50A Installation Manual

5

Installation Method

1. Parts prepared at site
Please prepare the following parts before installation of the unit.
Preparation parts
Unit fixing screw
Protective earth cable
(Ground cable)
Round terminal
Transmission cable
*1: When installing DIN rail, prepare 35mm(1.38inch) DIN rail. Mounting screws for DIN rail must be
also procured separately.
Applicable DIN rail types (IEC 60715/DIN 60715): TH35-7.5Fe, TH35-7.5Al

2. Allowable length of M-NET transmission lines

● Maximum length of M-NET transmission
● Maximum power feeding length
NOTE
* 1: Not including the remote control cables up to 10m (32 ft) in length. If the remote control
cable exceeds 10m (32 ft), the excess must be added to the total length in order to avoid
exceeding the maximum length.
Example
GB-50A
M-NET transmission line
(Centralized control line)
M-NET transmission line
(Indoor control line)
M4 screw x 4pcs (when using L-fittings) *1
Use sheathed vinyl cord or wire.
Wire type : Wire should not be lighter than ordinary PVC sheathed flexible
cord IEC 60227
(designation 60227 IEC 53)
Wire size : 0.75mm
Wire color : The color combination green/yellow
M4 screw size terminal (used for protective earth cable)
Type of the cable; Sheathed vinyl cords or cable which comply with the
following specifications or equivalent.
● CPEVΦ1.2mm to Φ1.6mm
● CVVS 1.25mm
*CPEV: PE insulated PVC jacketed shielded
communication cable
*CVVS: PVC insulated PVC jacketed shielded
control cable
PE: Polyethylene
Outdoor
unit
Power
supply
unit
Outdoor
Specification
2 2
to 2mm (AWG 18 to 14)
2 2
to 2mm (AWG 16 to 14)
PVC: Polyvinyl chloride
=500m/1640 ft *1
=200m/656 ft *1
ℓ1 ℓ2
Indoor Indoor
ℓ4
Remote controller
Indoor Indoor
ℓ6
Indoor Indoor
ℓ8
Remote controller
7
ℓ3
Indoor
ℓ5
Indoor
ℓ7
Indoor