Power Guards
Introduction to Phidget Power Guards
Products for USB Sensing and Control
Motor controllers from Phidgets Inc. are able to rapidly change motor directions, strongly brake the motor, and produce power with regenerative braking. Battery powered systems can easily absorb these surges of power - but most Power Supplies will immediately fail if a power surge is detected on the output.
| Controller | Motor Rated Current | Suggested Power Guard |
|---|---|---|
| STC1000 | Less than 1.5A | None |
| STC1000 | 1.5A to 5A | SAF2000 |
| STC1000 | Greater than 5A | SAF1000 |
| DCC1000 | Less than 1A | None |
| DCC1000 | 1A to 5A | SAF2000 |
| DCC1000 | Greater than 5A | SAF1000 |
This Phidget protects a power supply between 0 and 30V DC. Check the product page or data sheet of the device being powered to determine how much current is needed and what voltage range is permissable. Select the power supply from the list below that matches your region's wall socket type.
| Product | Electrical Properties | Physical Properties | ||
|---|---|---|---|---|
| Part Number | Price | Power Supply Current | Output Voltage | Wall Plug Style |
 Power Supply 24VDC 14.6A
|
$40.00 | 14.6 A | 24 V | — |
 Power Supply 24VDC 25A Current Limiting
|
$120.00 | 25 A | 24 V | — |
 Power Supply DIN Mount 24VDC 1A
|
$20.00 | 1 A | 24 V | — |
 Power Supply 12VDC 0.5A - EU
|
$1.50 | 500 mA | 12 V | European |
 Power Supply 12VDC 0.5A - US
|
$1.50 | 500 mA | 12 V | North American |
 Power Supply 12VDC 2.0A - AU
|
$10.00 | 2 A | 12 V | Australian |
 Power Supply 12VDC 2.0A - EU
|
$10.00 | 2 A | 12 V | European |
 Power Supply 12VDC 2.0A - UK
|
$10.00 | 2 A | 12 V | British |
 Power Supply 12VDC 5A
|
$20.00 | 5 A | 12 V | — |
 Power Supply 24VDC 1.0A - US
|
$10.00 | 1 A | 24 V | North American |
 Power Supply 24VDC 2.5A
|
$20.00 | 2.5 A | 24 V | — |
 Power Supply 24VDC 5A
|
$40.00 | 5 A | 24 V | — |
 Power Supply-12VDC 2.0A - US
|
$10.00 | 2 A | 12 V | North American |
Welcome to the SAF2000 user guide! In order to get started, make sure you have the following hardware on hand:
Next, you will need to connect the pieces:
The SAF2000 protects both your power supply and your device from voltage spikes caused by reverse EMF generated by braking and reversing DC motors. In the event of such a surge, it prevents current from flowing back into the power supply and clamps the powered device's supply voltage to a maximum of 37V, dissipating the excess power until the surge has passed.
This device uses a diode to prevent current flowing back into the power supply, so expect a slight drop in the voltage seen by the powered device when in normal operation.
| Power Supply Protector | |
|---|---|
| Trip Voltage | 37 |
| Continuous Current | 5 A |
| Physical Properties | |
| Operating Temperature Max | 85 °C |
| Operating Temperature Min | -40 °C |
| Recommended Wire Size | 16 - 26 AWG |
| Power Jack | 5.5x2.1mm, Center Positive |
| Customs Information | |
| Canadian HS Export Code | 8471.80.00 |
| American HTS Import Code | 8471.80.40.00 |
| Country of Origin | CN (China) |
| Date | Board Revision | Device Version | Comment |
|---|---|---|---|
| June 2017 | 0 | N/A | Product Release |
