C-top control head with AS-I communication is a special design for auto-control valves. It can be installed on butterfly valve, ball valve. Mix-proof valve. Divert valve, seat valve, etc

AS-I bus protocol Operating Principles
- AS-I interface is a spot bus-mastering,. It connect actuators and sensors network to a high level control equipment (main controller)
- The creation of a AS-I network needs power, one or several control module, bus-mastering(implement cable), C-top that prepared for AS-I connection (special built-in card, connect cable,insulated replacement connector)

- The power supplies voltage for AS-I spot.
- Sensors and Solenoid valves are controlled by main control module.
- Every module can transfer information to PLC, and can control up to 31 pieces C-Top.
- Implement cables ensure interact connections smoothly, the cables not only transfer
information, but also supply power for Sensors and Solenoid valves.
- AS-I C-TOP must be installed with sensor and 24V DC.
- Insulated replacement connector is used to connect the implement cables for C-top with busmastering cables. Therefore, it doesn’t need any cable to connect C-top with control system.
Connecting sensors with solenoid valve (actuator) easily, fast;economically by AS-I bus-mastering. Since cables are largely decreased, installation and startup become more convenient.Besides, start time is shortened, and some hidden troubles in the installation

can be avoided.
Technical specifications
- Max c-top unit: 31 groups
- Connection cable: 2m
- Bus-mastering: max 1m
- Bus-mastering (excluding): two cables are used for digital and 30V DC voltage.
- AS-I card size: 2.1
- AS-I card capacity: four input and four output (4 solenoid valves and four sensors)
 Each main controller can connect 31 pieces C-TOP unit.