SD84 - 84 Channel Multifunction Servo Controller
Devantech
Overview
The SD84 is an 84 channel servo controller module. It will drive up to 84 RC servo's and maintain a 20mS refresh rate, regardless of the number of servo's used or their positions (pulse widths). It controls both the speed and position of the servo's. It's controlled by sending commands to the on-board processors over the USB bus. Each of the 84 channels can be a Digital Input, Digital Output or Servo Output. Additionally, 36 of the channels can be 10-bit Analogue inputs, making this a great animatronics controller. Drivers available for Windows, Apple, Linux and Open BSD.
| SD84 | |
|---|---|
| Servo Channels | Up to 84 |
| Logic Outputs | Up to 84 |
| Logic Inputs | Up to 84 |
| 10-bit Analogue Inputs | Up to 36 |
| Servo Refresh Rate | 20mS under all conditions |
| Position Control | Directly programmed in uS |
| Speed Control | From maximum down to 20 seconds for full rotation |
| Control interface | USB |
| Servo Power | Separate terminals for voltage of your choice in groups of 8 servos |
| Logic Power | Direct from the USB Bus |
Connections
The SD84 has 84 sets of 3-pin headers, in groups of 4 at a time. In all cases, the pin nearest the outside of the PCB is 0v Ground. The middle pin is +V power for the servo from the associated 2-pin screw terminals. The inside pin, nearest the CPU's is the signal pin.
Power
The logic circuitry on the SD84 module is powered from the USB bus and does not require any external power. You need to provide external power for the servo's or any other circuitry you want to connect to the I/O's. The servo's are powered in groups of 8 servo's. PL1 provides the power for servo's 1 to 8 on ch1 to ch8. The only exception is PL5 which powers 12 servo's ch33 to ch44 inclusive. The bar lines on the diagram above indicate which servo's are powered from which screw terminals. Each group can be powered from a different voltage, but note that the 0v grounds are all common and connected together on the PCB.
Connecting Servos
The servos are plugged directly onto the SD84, with the ground pin (black wire on a hitec servo) nearest the outside of the PCB.
Manufacturer's data
Product information for: SD84 - 84 Channel Multifunction Servo Controller
Publishing date (date of last technical specification): 2010-11-10
Weight: 88 g
Shipping weight: 120 g
Manufacturer: Devantech
Brand: ROBOT ELECTRONICS
Article number: DEV-SD84
Manufacturer's part number: SD84
The article SD84 - 84 Channel Multifunction Servo Controller is listed in the following categories:
Modules > Communication
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updated: 11.05.2023
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EUR 82.98 = GBP 70.95
EUR 69.73 = GBP 59.62
(€1=GBP0.85505)
EUR 82.98 = USD 95.00
EUR 69.73 = USD 79.83
(€1=USD1.1448)
EUR 82.98 = CAD 119.62
EUR 69.73 = CAD 100.52
(€1=CAD1.4416)
EUR 82.98 = AUD 130.20
EUR 69.73 = AUD 109.41
(€1=AUD1.5690)
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About ROBOT ELECTRONICS
ROBOT ELECTRONICS is a brand by English manufacturer Devantech Ltd., based in Norfolk. Product range comprises sensors, in particular ultrasonic or compass, servocontrollers as well as small robot drive systems or relay modules with various interfaces. Sensors are produced in England and are of consistently high quality.
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