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Tamagawa Serial Incremental/Absolute Encoder

This section provides wiring instructions for a motor equipped with a Tamagawa SA35-17/33Bit-LPS (TS5667N120/N127) absolute encoder or a Tamagawa 23/39-bit serial absolute encoder. These encoders transmit their position data as a serial bit stream via RS-485 lines rather than A-B incremental pulses. For these absolute encoders to provide high resolution 33-bit or 39-bit absolute encoder position information, they must be provided with continuous power with a battery backup. The continuous power maintains a 16-bit "turns count" register that augments the single turn data. Alternately, the first encoder can be configured as a high resolution 17-bit serial incremental encoder that utilizes only the single turn data and does not require a battery backup.

Due to the additional capabilities needed to process the absolute encoder signal, these encoders may require the "Enhanced Encoders" license. Contact Brooks for the current hardware requirements for interfacing to these types of encoders.

For information on configuring this type of encoder, see the Software Setup section of the Controller Software section of the PreciseFlex Library.

In addition to Table 12-37, review the Installation Information for important recommendations on the use of twisted pair wires and shield grounding.

When six absolute encoders are utilized with a 6-Axis PreciseFlex G6600 controller, the 1^st and 2^nd Encoder Connectors support additional signals to interface to absolute encoders for motors 5 and 6, respectively. In this situation, additional 5VDC encoder power and encoder battery power pins can be obtained by using the "Extra Encoder / Battery Power Headers."

If the encoder is to be used in absolute mode, a battery must be connected to the Absolute Encoder Battery Connector on the HVCPU board. See the information on that connector for detailed pin outs and plug types. Table 12-39 contains information on the required battery power.