Absolute rotary encoder
Posital’s Ixarc magnetic absolute encoders with CANopen interfaces are now available with an optional connection cap. This makes device configuration and troubleshooting simpler and more intuitive.
For previous generation Ixarc magnetic encoders with CANopen interfaces, device setup was accomplished by updating software parameters, requiring special tools and expertise. The connection cap interfaces contain three rotary switches that enable the installer to define the node ID and bit-rate directly with a small screwdriver. There are also diagnostic LEDs on the backside that indicate device and network status. With eight screw terminals inside the cap, the user can install cables for power supply and bus-in bus-out. A slide switch can be set to activate a termination resistor when the device is located at the end of the network.
The encoders with CANopen interfaces are suitable for a range of motion control and factory automation applications. The data communication is done via message telegrams. In general, telegrams can be split in a COB-Identifier and up to eight following bytes. The COB-Identifier, which determines the priority of the message, is made from the function code and the node number. The node number is uniquely assigned to each user.
Compared to optical encoders, they are almost 30 % more compact, with superior resistance to shock and vibration loads. Available IP 66/67 protection makes these devices suitable for harsh environmental conditions. Single- and multi-turn models are available; for multi-turn versions, the rotation counter is self-powered, with no need for backup batteries and a measurement range of four billion revolutions (32 bits). A variety of connection cap options are available, including cable glands for cables of various lengths and M12 connectors for use with pre-assembled cables. Connection caps with two or three connectors make it possible to connect multiple devices in series (daisy chain), without T-couplers.
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