Samsomatic - Model Type 4747 -Limit Switch

Application
Limit switch with inductive or electric limit contacts in type of protection Ex d (flameproof enclosure) or Ex ia (intrinsic safety) for attachment to pneumatic linear and rotary actuators according to VDI/VDE 3845

General
The Type 4747 Limit Switch issues an electric signal when the valve travel exceeds or falls below an adjusted limit. The signal is suitable for switching control signals, issuing visual and audible alarms, or for connection to central control or alarm systems.

Versions
Continuously adjustable limit contacts, switching functions, and mounting kits allow the Type 4747 Limit Switch to be optimally adapted for the specific task:

General

• Electrical connection using M20 x 1.5 or ½ NPT cable gland to terminals
• Corrosion-resistant, rugged enclosure with degree of protection IP 66 for adverse environmental conditions
• Maximum permissible ambient temperature –40 to +80 °C
• Mounting kits for linear actuators according to IEC 60534-6-1, rotary actuators with interface according to VDI/VDE 3845 or SAMSON direct attachment

Limit contacts:

• Maximum two limit contacts, continuous and easy adjustment
• Inductive proximity sensors or electric microswitches

Type of protection:

• Flameproof enclosure II 2G Ex d IIC T6 and II 2D Ex tD A21 IP66 T 80°C
• Intrinsic safety II 2G Ex ia IIC T6 Gb and II 2D Ex tb IIIC T85°C Db IP66