28023 Parallax Inc, 28023 Datasheet - Page 7

• Manufacturer Part Number: 28023
• Description: CONTROLLER 16SERVO MOTOR CONTROL
• Manufacturer: Parallax Inc

Specifications of 28023

• Lead Free Status: Contains lead
• Main Purpose: Power Management, Motor Control
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: BASIC Stamp® or Javelin Modules
• Primary Attributes: Servo Controller
• Secondary Attributes: 16 channels
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 28023PAR

Serial In
© 2004
Networking Two PSCs Together
It is possible to network two PSCs together to control up to 32 servos. Simply use a second 3-Conductor
cable to daisy chain two PSCs together as shown in Figure 6. The presence of a shunt differentiates
between Unit 0 (channels 0-15) and Unit 1 ( channels 16-31).
Figure 4: PSC without jumper (Ch0-15).
Please note that in this configuration when you send a serial command to one unit, you send it to both.
Commands that set servo positions are the only commands ignored by the other unit.
commands invoke a reply. Unit 0 replies first. Unit 1 replies approximately 3 mS later. Since all replies
are fixed at 3 byte lengths, you would need to configure your SERIN command to receive six bytes.
Parallax, Inc. • Parallax Servo Controller – Rev B ver2.4 (#28023) • 1/2005
- + S
+
-
Battery
9 Vdc
Ch15
Ch13
Ch11
Ch9
Ch7
Ch5
Ch3
Ch1
Sout
Sin
ATN
Vss
P0
P1
P2
P3
P4
P5
P6
P7
www.parallax.com/sic
1
U1
6-9VDC
Vin
Vss
Rst
Vdd
P15
P14
P13
P12
P11
P10
P9
P8
TM
Vss
P0
P2
P4
P6
P8
P10
P12
P14
Vdd
0 1 2
Reset
X1
Vss
P1
P3
P5
P7
P9
P11
P13
P15
Vin
Pwr
+
P15
P14
P13
P12
P11
P10
P9
P8
P7
P6
P5
P4
P3
P2
P1
P0
X2
X3
Figure 6: Two PSCs daisy chained together.
Ch14
Ch12
Ch10
Ch8
Ch6
Ch4
Ch2
Ch0
Board of Education
Rev C
Vdd
15 14
X4
Vdd
Vin
© 2000-2003
S + -
13 12
Rev B
X5
Vss
Red
Black
Serial I/O
Ch31
Ch29
Ch27
Ch25
Ch23
Ch21
Ch19
Ch17
GND
Serial In
© 2004
- + S
+5
+
-
Ch15
Ch13
Ch11
Ch9
Ch7
Ch5
Ch3
Ch1
Ch 0-15
Serial In
+
© 2004
Ch14
Ch12
Ch10
Ch8
Ch6
Ch4
Ch2
Ch0
Figure 5: PSC with jumper (Ch16-31).
- + S
S + -
Rev B
+
-
Ch15
Ch13
Ch11
Ch9
Ch7
Ch5
Ch3
Ch1
Serial In
© 2004
- + S
+
-
Ch15
Ch13
Ch11
Ch9
Ch7
Ch5
Ch3
Ch1
Ch 16-31
+
Ch14
Ch12
Ch10
Ch8
Ch6
Ch4
Ch2
Ch0
+
S + -
Rev B
Ch14
Ch12
Ch10
Ch8
Ch6
Ch4
Ch2
Ch0
S + -
All other
Rev B
7
GND
+5
Aux 1
Ch30
Ch28
Ch26
Ch24
Ch22
Ch20
Ch18
Ch16