China SG-1A Relay Box:
SG-1A Relay Box
1)Chapter 1 of Part 4 of the “ Steel Ship Classification Rules" of the China Classification Society:
2)YD/T729-94 method for automatic exchanger network access;
3)GF002-9002.4 technique specification for automatic exchanger equipments in technical ministry of posts and tele communication
Colour:Dull black
Shell material: ABS
Cable gland: 4-M20x1.5
Power supply: AC220V±10% or DC24V±10%
IP rating: IP44