Table of Contents
Advertisement
Soloist Hardware Manual
3.3.
Motor Feedback (J103)
The 25-pin " D" style connector contains all of the necessary feedback inputs to complete
a servo loop. This connector has inputs for a 3-channel encoder, three end-of-travel limit
switches, thermistor over-temperature sense input and three Hall effect devices.
The three line driver encoder signals consists of the following: sine (SIN), cosine (COS),
and marker (MKR) as well as their complimentary signals: sine-n (SIN-N), cosine-n
(COS-N), and marker-n (MKR-N). The encoder input is defined for a differential line
driver encoder, in the range of 0 to +5 volts. It allows up to an 8 MHz encoder signal (31
nsec minimum edge separation), producing 32 million counts per second, after
multiplying by four (x 4) quadrature decoding. See Figure 3-2 for typical input circuitry
of the encoder signals. The Soloist standardly accepts a line driver encoder, or with the –
MXU option, an analog sine wave encoder (see Section 3.3.1). See Section 2.8.1.
Encoder Phasing, for information on interfacing to non-Aerotech motors.
Two of the three limit inputs are end-of-travel sensing (CW Limit and CCW Limit) while
the third is an optional reference limit (Home Limit). Alternatively, opto-isolated user
inputs 8-10 may be used as the end-of-travel limit inputs, see Section 3.1.3. The Hall
effect switch inputs are recommended for AC brushless motor commutation but not
absolutely required. The Hall effect and limit inputs accept 5-24 VDC logic signals. The
Pin-outs for the connector are shown in Table 3-11.
The thermistor input is used to detect an over temperature condition in the motor, by a
positive temperature coefficient device. That is, as the temperature of the device
increases, so does the resistance of the device. Under normal operating conditions, the
resistance of the thermistor is low (i.e., 100 ohms). This will be seen as a low input signal.
After the temperature causes the thermistor's resistance to increase above 1K ohms, the
signal will be seen as a logic high, triggering an over temperature fault by the controllers
FaultMasks. See the Soloist HMI help for more information on configuring these
FaultMasks.
Table 3-10.
Motor Feedback Connector Mating Connector (J103)
Connector
Back shell
The Soloist is factory configured for either a square wave differential encoder
(default), OR an analog encoder with the -MXU option).
www.aerotech.com
Aerotech
ECK00101
ECK00656
Third party Source
Cinch P/N DB25P
Amphenol P/N 17-1726-2
Technical Details
3-15
13
25
14
1
Advertisement
Table of Contents
