Installation Method - Mitsubishi Electric GB-50A Installation Manual

1) Maximum length of M-NET transmission
1 L2+L3+L4+ℓ1+ℓ2+ℓ3 (ℓ4)
2 L2+L3+L4+ℓ1+ℓ5
3 L2+L3+L5+ℓ6+ℓ7 (ℓ8)
4 ℓ3 (ℓ4)+ ℓ2+ℓ1+L4+L5+ℓ6+ℓ7 (ℓ8)
5 ℓ5+ℓ1+L4+L5+ℓ6+ℓ7 (ℓ8)
2) Maximum power feeding length for the indoor control line
1 ℓ1+ℓ2+ℓ3 (ℓ4)
2 ℓ1+ℓ5
3) Maximum power feeding length for the centralized control line
1 L1+L2
2 L1+L3+L4 (L5)
NOTE
If the remote control cable (ℓ4, ℓ8) do not exceed 10m (32 ft) in length, the length for ℓ4, ℓ8 may
not be considered to the total length.

3. Installation method

Central controller GB-50A is not waterproof.
Installation methods for the central controller GB-50A are shown below.
Method1: Horizontal installation using L-fittings
Attach two L-fittings to GB-50A using the supplied screws (Fig.5-1), then install GB-50A (Fig.5-2).
GB-50A shall be installed in a control panel box (steel: thickness 1mm (3/64 in) or more).
Please prepare the control panel box in consideration with installation space as shown in the Fig.5-2.
(Install in an area capable of withstanding a 1.1 kg (2 1/2 lb) load.)
Install GB-50A horizontally as shown in the Fig.5-2.
Total of 4 screws
(Both sides)
Fig.5-1
CAUTION
● L-fittings must be fixed at two points on the unit.
● The unit with L-fittings must be fixed at four points to prevent the unit from falling.
NOTE(*1)
When connecting the protective earth cable after GB-50A is installed, leave some space for
mounting screws. When there is little space for mounting screws, connect the grounding wire before
GB-50A is installed.
M3
20 (13/16) *1
=500m/1640 ft
=500m/1640 ft
=500m/1640 ft
=500m/1640 ft
=500m/1640ft
=200m/656 ft
=200m/656 ft
=200m/656 ft
=200m/656 ft
290 (11 13/32)
50 (2)
Fig.5-2
8
20 (13/16)
M4
20 (13/16)
unit:mm(in)