Sequent Microsystems

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Payment

What payment methods do you accept?

We accept the following credit cards: MasterCard, Visa, American Express and Discover. We also accept payment by PayPal or Amazon Pay. If you decide to use either of these two methods, you’ll be taken to either the PayPal or Amazon Pay website, where you’ll be prompted to log in and process your payment. You’ll then be directed back to our merchant website once your transaction is complete.

You can also pay by wire transfer or by check. You can select any of these methods at checkout. 

To request Net-30 terms please send a valid purchase order on your company's leterhead to support@sequentmicrosystems.com

Where is my refund?

We aim to process refunds within three days of an item being returned to us. Please note, however, that your bank may take several days to process the payment back into your account. With that said, please allow up to ten working days after posting the item back to us before getting in touch about your refund. 

Ordering and delivery

Can I place an order without creating an account?

Yes. You can place an order as a guest with no obligation to create an account. However, we do recommend that you create an account in order to be able to check your order history. We also recommend that you subscribe to our email newsletter, in order for us to notify you of bug fixes, new products or enhancements. 

Click HERE to create a new account.

Where is my order confirmation?

This is automatically sent to your email address when you place an order. If you haven’t received your order confirmation within 24 hours, please get in touch at sales@sequentmicrosystems.com just in case there’s a problem with your order. Please check your mailbox’s spam or junk folder before contacting in case the order confirmation has been diverted there.

How do I cancel my order?

There is only a short amount of time between when you place your order and when we start processing it. If you contact us straight away after ordering, via sales@yourstorename.com, we may be able to cancel your order before it’s processed. If not, we’ll despatch your order and then you can return it to us if you wish upon receiving it.

Can I alter my order?

If your order has not been dispatched, send an email to support@sequentmicrosystems.com with the required changes and we'll try to adjust. We will send a refund or invoice if there is a difference in cost.

When will my order arrive?

Orders that require shipping within the U.S. will be delivered within three to ten days, depending on your preferred shipping method. Shipping to countries outside of the U.S. may take up to 14 days. Please get in touch if your order hasn’t been delivered according to the expected timescales, and we will check your order status.

What countries do you ship to?

We ship to most regions worldwide. You can select the shipping carrier at checkout. USPS usually delivers in 7-20 days to most countries, while UPS or DHL can deliver in 1-3 days.

How much is shipping?

Shipping costs depend on the item you’ve ordered and the country where it’s being delivered and it is calculated at checkout. 

If your order value is more than $15 we provide free shipping within the U.S. After placing your order, enter the code FREE-SHIPPING at checkout.

Can I track my order?

Yes. We’ll provide updates at every stage of your order, from the moment you place it, through to despatch and delivery. In your delivery confirmation emails, you’ll receive a tracking reference which you can use to check the progress of your order online.

Technical Support

Can your cards be intermixed? How many?

Theoretically, all our stackable cards can be intermixed in almost any configuration, up to eight of each type. 

In practical terms, stacking more than eight cards becomes mechanically challanging.

What is the maximum signal frequency on digital input ports?

At this point six of our cards can process digital inputs. The maximum frequency of input signals, or transitions per second that can be sensed, is the following:

  1. Home Automation Card has 8 optocoupled inputs prepolarized at 5V and can count transitions up to 125Hz.
  2. Industrial Automation Card has 4 optocoupled inputs that can count transitions up to 500Hz
  3. Building Automation Card has 8 dry contacts inputs that can read signals up to 500Hz

The following cards can read both AC and DC signs have a low pass filter at 25 Hz and can count up to 10 transitions per second:

  1. Sixteen Digital Inputs Card, which can read 16 AC/DC signals from 3V to 24V
  2. Four Relays four Inputs Card, which can read 4 AC/DC signals from 3V to 240V
  3. Eight HV Digital Inputs Card, which can read 8 AC/DC signals from 3V to 240V

What GPIO pins are your cards using?

All our cards use only the I2C pins from the Raspberry Pi GPIO connector to communicate with Raspberry Pi, leaving the other 25 pins available for your use.

Cards with on-board watchdog control the power to the Raspberry from the local processor. If the watchdog is activated, power is cut off if Raspberry does not access the I2C port in the preset time interval.

Cards with RS485 tranceiver use also one serial port of the Raspberry Pi. If enough resources are available, the RS485 port might be connected to the local processor as well, and jumpers are provided to decide who is controlling the transceiver.

Cards on on-board push-button have the push-button connected to pin 37 of the GPIO connector. The push-button is also connected to the local processor, if present and enough resources are available. 

Cards without a processor use I2C expanders to control the I/Os.

The only exception to all the rules is the I/O Learning Card, which uses the resources of the Raspberry Pi and is not stackable.

Sequent Microsystems GPIO Connector for Raspberry Pi HATS

Do you sell your product abroad or only in the US?

We sell worldwide. For small orders, the cheapest shipping carrier is USPS, which will pass the package to your local postal service.

For larger orders we use UPS and DHL. Shipping cost is calculated at checkout.

Do you have RoHS and REACH Compliance Declarations for your cards?

We keep RoHS and REACH Compliance Declarations on file for all our cards. If you need a local copy you can download it here:

Building Automation 8-Layer Stackable HAT for Raspberry Pi


Eight HV Inputs 8-Layer Stackable HAT for Raspberry Pi


Eight MOSFETS 8-Layer Stackable HAT for Raspberry Pi


Eight Relays 8-Layer Stackable HAT for Raspberry Pi


Four Relays four Inputs 8-Layer Stackable HAT for Raspberry Pi


Home Automation 8-Layer Stackable HAT for Raspberry Pi


I/O Learning Card with Full Node-RED Tutorial for Raspberry Pi


Industrial Automation 8-Layer Stackable HAT for Raspberry Pi


RTD Data Acquisition 8-Layer Stackable HAT for Raspberry Pi


Sixteen Digital Inputs 8-Layer Stackable HAT for Raspberry Pi


Sixteen Relays 8-Layer Stackable HAT for Raspberry Pi


Smart Fan HAT the Best Cooling Solution for Raspberry Pi


Super Watchdog HAT with Battery Backup for Raspberry Pi


Three 40A/240V Relays RS485 Daisy-chainable HAT for Raspberry Pi

How do I connect my load to an Open Drain Output?

The following diagram shows how to connect your load to any of our cards with an open drain output. You have to provide the power supply and to connect the load as shown. Make sure the DC voltage of the power supply does not exceed the specifications of the card.

Open Drain Loads

Can you stack a Home and an Industrial Automation board?

Yes, you can stack them, but mecanically the Home Automation card needs to be on top of the Industrial Automation card.

Since each card can be stacked to itself, you can stack up to eight Industrial Automation cards on top of the Raspberry Pi, and add up to eight Home Automation to the assembly.

Can I use Sequent Microsystems I/O cards with ROCK PI 4 ?

Yes, you can use all our cards with ROCK PI 4.

Because our drivers are made for Raspberry Pi, some changes need to be made.

Here a step-by-step example for setting up your ROCK PI 4 for using the  Home Automation For Raspberry Pi Card :

1) Install Debian https://wiki.radxa.com/Rockpi4/Debian  (u/p:rock/rock)
2) Install mraa library : https://wiki.radxa.com/Rockpi4/dev/libmraa
3) Turn on the I2C port  sudo nano boot/hw_intfc.conf   | turn on i2c7
4) Install build tools: sudo apt-get install build-essential python-pip python-dev python-smbus git
5) Get the repository: ~$ git clone https://github.com/SequentMicrosystems/ioplus-rpi.git
6) Change "/dev/i2c-1" with "/dev/i2c-7" in ioplus-rpi/src/comm.c
7) cd ioplus-rpi/
8) Install the ioplus command line interface: ~/ioplus-rpi$ sudo make install
9) Connect the card and test the software ioplus -list shuld return the cards connected to the ROCK PI.

 

My Question is not here. How can I get an answer?

Please use the Contact Us form to send your question, or email us to support@sequentmicrosystems.com

We answer most inquiries in 24 hours, and if your question is of general interest we'll post the answer as well