We have now become accustomed to high-tech sensors such as rotary encoders having an industrial Ethernet connection and transmitting their complex actual values (position, speed, other status information) to a (now mostly PC-based) controller via a standardized bus protocol. The times when a separate line was used for each bit of the absolute position value seem to be forgotten. But sometimes this is exactly what is required. The first applications that come to mind are those in which new encoders have to be connected to existing control technology that only has a bit-parallel interface and no bus or even Industrial Ethernet connection.
However, the rotary encoders with parallel interface from TR Electronic can do much more. In addition to the bits for the position, the encoder is also able to generate many different special signals such as direction of rotation, standstill monitors, virtual limit switches and thus replaces additional evaluation electronics for direct on-site evaluation.
Like all encoders of the current Generation 2, various shaft shapes and diameters are also available in the standard modular system when using the parallel interface. Rotary encoders in size 58 mm can be equipped with solid shafts up to 12 mm in diameter, with blind hole and continuous hollow shafts up to 15 mm.
The C_H802 and C_H1102 designs are available for larger shaft diameters. Their through hollow shafts can accommodate machine shafts up to 25 mm (for 802) or 50 mm (for 1102).
Generation 2 of the TR absolute encoders also adapts to customer requirements in other parameters: Fully magnetic scanning with up to 13 bits within the revolutions is available, as is high-resolution optical scanning with 18 bits within the revolution. In addition, 4096 revolutions are genuinely scanned, without the need for a battery or electronic counter – the reliably determined position value is available immediately after switching on, even if the system has been de-energized.