39
2.8.3
SFD BAT+
NOTE
SFD BAT is not implemented.
2.8.4
DAC Monitors
J4-14
DAC MON1
J4-15
DAC MON2
The DAC Monitors are general-purpose analog monitor points. The output
range is 0.5 to 4.5 volts with a source impedance of 2.9 k
Ω
, which limits the
short circuit to I/O RTN to 2 mA.
Each DAC Monitor can be mapped by software to one of a number of internal
variables.
J4-13, 16, 23,
26
I/O RTN
I/O RTN is the ground reference for the DAC MON, Analog Command,
Encoder output/inputs, and SFD BAT+. These pins are electrically shorted
together inside the drive.
NOTE
Connect one of the I/O RTN pins to an earth ground point in the
cabinet reserved for single point grounding of all returns (drives
and supplies) to control common mode voltage.
2.8.5
Encoder Outputs
J4-19
CH A OUT/IN
J4-20
CH A OUT
J4-21
CH B OUT
J4-22
CH B OUT
Outputs
Channels A and B are RS-485 compliant differential outputs.
Channels A and B provide position signals generated from the
feedback device that emulate a quadrature encoder.
The outputs are buffered by 5.0 volt 75LBC170 type RS-422
compatible line drivers. Recommended load current is ±20 mA,
which corresponds to a line-to-line load resistance of 100
Ω
. These
outputs are short circuit proof to I/O RTN.
The resolution of the Encoder Outputs (number of pulses per motor
revolution), is set by S1 (rotary switch), as follows:
Содержание S20630
Страница 6: ......
Страница 15: ...9 3 1 6 E 6 E 6 E 6 E 6 E 6 E 6 E 6 E...
Страница 19: ...13 1 6 11 General 3H 3 3H 5 E 3 3 5J...
Страница 94: ......