NAiS FP1

56
3-3. Wiring
Twisted Pair Cable: 1-pair
Notes:
1. Three or more parts of cable should not be connected to one RS485 port.
2. Grounding example
Conductors
Insulation
Jacket
• Conductor
Size: Min. 0.5 mm
2
(AWG20 or lager)
• Cable
Insulation material: Polyethylene
Insulation thickness: Max. 0.5 mm/0.20 in.
Jacket thickness: Approx. 1.5 mm/0.59 in.
+ - F.G.
RS485 Interface
Ground
Control box
Communication
cable
Frame ground
+ - F.G.
RS485 Interface
Ground
Control box
Frame
ground
Communication
cable
Communication
cable
• When the control box is grounded:
+ - F.G.
RS485 Interface
Control box
Communication
cable
Frame ground
+ - F.G.
RS485 Interface
Control box
Communication
cable
Communication
cable
• When the control box is not grounded:
Frame
ground