KAmodRPiPwrRELAY: Difference between revisions
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Anna Kubacka (talk | contribs) Created page with "__jzpdf__ ===== Introduction ===== KAmodRPiPwrRELAY is a universal functional expander for RaspberryPi and Raspberry Pi+ minicomputers, equipped with two electromechanical rel..." |
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* Recommended maximum load currents: 5A/240VAC, 5A/28VDC | * Recommended maximum load currents: 5A/240VAC, 5A/28VDC | ||
''Transistor outputs'' | |||
* Two open-collector lines | * Two open-collector lines | ||
* Output circuits protected by diodes connected to +5V | * Output circuits protected by diodes connected to +5V | ||
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The expander is adapted to cooperate also with RaspberryPi+ minicomputers | The expander is adapted to cooperate also with RaspberryPi+ minicomputers | ||
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===== Standard equipment ===== | ===== Standard equipment ===== | ||
Revision as of 13:01, 29 August 2018
Introduction
KAmodRPiPwrRELAY is a universal functional expander for RaspberryPi and Raspberry Pi+ minicomputers, equipped with two electromechanical relays and two transistor drivers (open-collector outputs) that buffer four GPIO lines and make possible to e.g. remote lighting control, switching on of heating and other tasks requiring remote access.
Basic features and parameters
- Compatibility with RaspberryPi i RaspberryPi+ minicomputers
- Four binary outputs, including:
- Two relay outputs
- Two transistor outputs
- Output states monitored with LED
- Extended I/O pins of Rpi minicomputer
- Screw terminals ARK
Relay outputs
- Two SPDT outputs
- Maximum switching voltage: 250VAC/30VDC
- Maximum switching current (resistive load): 10A
- Recommended maximum load currents: 5A/240VAC, 5A/28VDC
Transistor outputs
- Two open-collector lines
- Output circuits protected by diodes connected to +5V
- They can be used directly or to control two additional relays
- Maximum output current:
- 300mA/channel (by using one channel) or
- 200mA/ channel (by using two channels)
The expander is adapted to cooperate also with RaspberryPi+ minicomputers
Standard equipment
| Code | Description |
|---|---|
| KAmodRPiPwrRELAY |
|
Schematic
View of board
Relay outputs
Transistor outputs
Outputs and corresponding GPIO lines of RaspberryPi minicomputer
| GPIO lines | Output... |
|---|---|
| GPIO22 | ...relay Rel1 |
| GPIO23 | ...relay Rel2 |
| GPIO24 | ...open-collector Con4 |
| GPIO25 | ...open-collector Con3 |
Transistor outputs can be used for direct load control or for controlling the coils of two additional relays (as in the figure below).
| Maximum current load of the transistor outputs is limited by the maximum allowable power loss of the ULN2003 housing (details available in the chip documentation). |
Installation the expander on the RaspberryPi minicomputer connector
Installation the expander on the RaspberryPi+ minicomputer connector
