2-Channel Isolated RS485 Expansion HAT for Raspberry Pi
2-Channel Isolated RS485 Expansion HAT for Raspberry Pi is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Delivery Options
We offer several delivery choices to fit your needs:
- FREE Delivery: $0. Enjoy Free AusPost Parcel Standard Delivery on orders over $100 in value. Exclusions may apply.
- AusPost Untracked Letter: $3. Delivery in 3-8 business days (untracked). No refunds or replacements without proof of receiving the order.
- AusPost Parcel Standard: $9. Tracked delivery in 2-6 business days.
- AusPost Parcel Express: $13. Express tracked delivery in 1-3 business days.
- Pickup: $0. Email us to arrange a pickup from our location in Huntingdale 3166 in Melbourne at support@zaitronics.com.au. More details can be found in our contact page.
Additional Information
- Non-metro addresses in WA, NT, SA & TAS may require extra time.
- Certain batteries (like LiPo) cannot be shipped by air, affecting Express Post availability.
- We recommend selecting tracked options for valuable items. Untracked orders will not receive tracking numbers or refunds without proof of delivery.
- Note: Wherever possible, we will combine orders to save on shipping and reduce packaging waste.
- Note: Orders containing backordered item will delay delivery until all items are available
Warranty & Refund Policy
Warranty & Refund Policy
Warranty & Refund Policy
- Standard Warranty: 12 months for all products. Low-cost hobby parts have a 90-day warranty unless safe handling is shown.
- Exceptions: Kits and interfaceable electronics may not be covered if damaged due to misuse.
- Returns: Contact support via your order confirmation email within 14 days of purchase. Items must be unopened and in original packaging. Proof of purchase is required.
- Defective/Damaged Items: Notify us within 30 days for a free refund or replacement. Exclusions apply.
- Return Shipping Costs: Paid by the customer unless the item is defective. Shipping costs are non-refundable.
Features at a glance
This is a 2-channel isolated RS485 expansion HAT designed for Raspberry Pi, adopts the SC16IS752+SP3485 solution, with embedded protection circuits such as power supply isolation, magnetical isolation, and TVS diode, etc.
It is easy to control the 2-channel RS485 for auto transceiving via SPI interface. Due to its fast communication, stability, reliability, and safety, it is an ideal choice for fields like industrial automation.
- Standard Raspberry Pi 40PIN GPIO extension header, supports Raspberry Pi series boards
- Adopts SC16IS752+SP3485 dual chip combination, converts SPI to RS485, data rate up to 921600bps
- Allows transceiving data manually or automatically, configured by DIP switch
- Onboard TVS (Transient Voltage Suppressor), effectively suppress surge voltage and transient spike voltage in the circuit, lightningproof & anti-electrostatic
- Onboard resettable fuse and protection diodes, ensures the current/voltage stable outputs, provides over-current/over-voltage proof, and improves shock proof performance
- Onboard LEDs for indicating the power and transceiver status
- Breakout SPI control pins, for connecting with host control boards like Arduino
- Comes with online development resources and manual (examples in C and Python)
Specifications
UART expansion chip | SC16IS752 |
---|---|
RS485 transceiver | SP3485 |
Communication interface | SPI |
Data rate | 300 ~ 921600 bps |
Operating voltage | 3.3V / 5V |
Dimensions | 65.0 × 56.5mm |
Mounting hole size | 3.0mm |
-
SC16IS752
UART expansion chip -
π142M61
digital isolator -
PC817
optocoupler -
SP3485
RS485 transceiver -
B0505LS
power supply isolation module -
RT9193-33
power chip -
SMAJ12CA
transient suppress diode array - Self-recovery fuse
-
Status indicator
PWR: power indicator
RXD/TXD: UART transceiving indicator -
Raspberry Pi GPIO header
for connecting Raspberry Pi - RS485 terminal
-
MCU control header
for connecting host control boards like Arduino - 120Ω terminal resistor switch
- Interrupt pin switch
-
Operating mode selection
Half-auto: A=0, B=1
Full-auto: A=1, B=0 - Pin switching resistors