Reliance electric S-ABS II Card, Engineering Manual

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D-3
Specifications of Serial Absolute Encoder of IHI
- Backup time of internal secondary
lithium battery
: Minimum 48 hours
When the internal battery was charged for
longer than 24 hours with Vcc of 4.75 V
- Life of external battery
(per one axis)
: Minimum 2 years
Typical 6 years
Lithium cell ER17/33 of Hitachi-Maxwell
3.6 VDC, 1500 milli-amps-hours
Ambient Conditions
- Operating temperature : -10 to 70 degree C (14 to 158 degree F)
of case temperature
- Storage temperature : -20 to 80 degree C (-4 to 176 degree F)
- Humidity : Less than 90% RH (no condensation)
Communication of Absolute Signals
- Transmission line : RS-422A (IEA standard)
- Transmission method : Converted by Manchester coding and
transmitted synchronously; containing
CRC error checking function
- Data length : 32 bits (24 bits of absolute data + 8 bits
of status data)
- Transmission cycle : 84 microseconds
- Transmission distance : Maximum 200 meters *
- Type of modem : DN1811
- Data transmission format : Transmitted by dividing 32-bit data to two
of 16-bit data
* 1: Be careful that the specifications may be changed without notice.
2: The maximum transmission distance depends on size of cable wire. Use the
following recommended cable or equivalent:
Model M-53004 of Reliance Electric (size of wire 0.05 square millimeters,
twisted pair, seven pairs are shielded as a lot)
The above-mentioned maximum transmission distance of 200 meters is
obtained when the above cable is used.
3: When power wiring for encoders is installed in a same conduit, be careful to
acquire the required voltage at the encoders, considering voltage drop due
to cable length.