Modular I/O Boards

Mosaic's embedded controllers contain plenty of I/O for most applications: two serial ports and SPI; direct interfaces to graphics displays, touchscreen and keypads; A/D and D/A; timer-controlled digital I/O lines; and high-current drivers.

But what if you are designing embedded hardware that needs a unique combination of specialized I/O? For those special needs we have Wildcards - small (2.5”x2.0”), stackable expansion io modules, also known as mezzanine boards, including Ethernet, WiFi, GPS, digital I/O, A/D, D/A, signal conditioning, AC and DC relays, and much more - that you can mix-and-match to create your own custom system.

Wildcards mount directly onto Mosaic's customizable embedded computers, providing unprecedented I/O density.

This modular design, with careful consideration given to manufacturing and maintenance requirements, is well suited to both small and large applications, instrumentation and automation projects, and where cost and physical size are critical. Precoded device drivers are provided for all io and make it easy to do data acquisition, pulse width modulation, motor control, frequency measurements, data analysis, data logging, analog control, PID control, and communications.

The AC Solid State Relay Wildcard™ gives you independent control of up to four, 5 amp AC devices. Each AC relay is fully isolated from the others and switches at zero crossings of the AC line. Use the AC Solid State Relay WildCard to turn on and off larger relays, motors, pumps, heaters, refrigerators, valves, and fans.

This general purpose Analog I/O Wildcard features eight channels unipolar, single-ended or four channels unipolar, differential 16-bit resolution analog voltage inputs and eight channels of 12-bit resolution analog voltage outputs. Inputs and outputs use onboard or external references, and the onboard references are optionally provided as excitations for external circuitry. A field header brings out the analog I/O signals for the reference, DAC outputs, and A/D inputs. Use it for analog data acquisition, high-resolution analog digital conversion, data logging, measuring thermistors and RTDs, interfacing to analog sensors and actuators, and much more.

The Compact Flash Wildcard™ is ideal for applications that require large amounts of memory, the convenience of removable storage, and file-based data exchange with a PC. It allows you to plug in widely available Compact Flash memory cards that measure only 1.5” by 1.7” and hold many megabytes of nonvolatile data. Inexpensive form-factor adapters let you plug a CF Card into your laptop's PCMCIA socket for fast and easy file exchanges. This tiny 2” by 2.5” board is a member of the Wildcard series of mezzanine boards that connect to Mosaic embedded computers and instrument controllers.

The 24/7 Data Acquisition Wildcard™ is your instrument's complete analog front end, offering exceptional resolution, excellent stability, and remarkable noise rejection. Ideal for high resolution, low frequency measurements and data logging, this I/O module accepts low level signals directly from transducers - it amplifies and conditions them - and it converts them with 24 bits of resolution with no missing codes performance.

The analog-to-digital subsystem performs all the signal conditioning and conversion you need for up to seven input channels. Amplifier gain, low-pass filter corner frequency, and sampling rate are all software programmable using simple commands. This data acquisition system can extract highly accurate data, even from noisy sources with imperfect signal conditioning in electrically harsh environments. It has 256 times the resolution of standard 16-bit converters, but at comparable cost. Mosaic's 24/7 Data Acquisition Wildcard is the price-performance standard for high-resolution data acquisition systems.

The DC Relay Wildcard™ gives you optically isolated control of up to three, 3 amp DC devices. Activation of solenoids, motors, pumps, heaters, relays, valves, thermoelectric coolers and fans is a snap with this Wildcard. Each relay supports high or low side switching from a common supply. Fly-back, transient and surge protection provide safe and reliable control of inductive loads.

Ideal for pulse width modulation (pwm) control, the Digital I/O Wildcard™ adds plenty of programmable digital I/O to your embedded controller. In addition to 4 dedicated digital inputs, you can configure up to 16 more channels for either input or output. Each I/O line is also easily configured for pull-up, pull-down, or tri-state operation. This allows you to set the appropriate level of each I/O line in the interval between power-up and software initialization. The output sink capability is sufficient to directly drive LEDs, electromagnetic actuators, and other low power devices.

The EtherSmart Wildcard™ - Mosaic's low cost embedded Ethernet mezzanine board - makes it easy to put your instrument online. You can network your instrument in minutes - simply plug a standard Ethernet cable into the RJ-45 jack on the Wildcard, and your instrument can communicate with other computers on a Local Area Network (LAN). Your application program can send emails to alert other computers on the network when significant events occur.

The WiFi Wildcard™ implements a wireless interface that enables communications between your instrument and other computers or wireless access points via a Wireless Local Area Network (WLAN) using the standard 802.11b/g packet-based protocol. Built-in software lets you send emails from the instrument, serve out static and dynamic web pages to your PC-based browser, and implement serial data exchanges with peripheral devices, known as “Serial Tunneling”.

The GPS Wildcard™ tracks your instrument anywhere on the globe. Now you can design a mobile instrument that knows exactly where it is and how fast it is moving by accessing signals from Global Positioning System (GPS) satellites. Your application program can read the current latitude, longitude, altitude, speed, course heading, time, and date. In addition, the GPS Wildcard software reports position error estimates, GPS fix quality, and the number of satellites in view and in use to enable real-time diagnostics.

The I/O Filter Wildcard™ provides a place for prototyping analog circuitry or for filtering or conditioning I/O lines of other Wildcards. Twenty-four I/O lines can be independently filtered, or their signals can be combined in custom ways. Two 24-pin connectors are used for input and output; one generally mates to the field connector of a Wildcard I/O module, while the other connects to your external signals. A third connector accommodates the Wildcard Bus, which can be used for power and ground. Up to four through-hole and four surface-mount components can be soldered onto the board to filter each of the 24 I/O lines.

The Keypad/Display Wildcard™ provides a convenient interface to a 4 x 20 character display and 4 x 5 keypad. Combined with Mosaic's QCard Controller or PDQ Board, it is an ideal solution for handheld or space-constrained applications that require a programmable embedded computer and a low cost yet smart user interface. The Keypad/Display Wildcard is shipped with a 4x20 character display and 4x5 keypad, plus a simple ribbon cable interface that enables custom placement of the keypad and display in your instrument. The Wildcard has an additional field header that brings out 4 nibble-wise programmable input/output lines and 4 input lines.

This heavy-duty board provides eight high-current outputs and four high-voltage digital inputs. Inputs and outputs are optically isolated to ±2500 volts. The Power I/O Wildcard™ is a versatile isolated DC solid state relays board that makes it a snap to interface high voltage peripherals to your instrumentation or automation project.

The Prototyping Wildcard™ is a general purpose, sea-of-holes printed circuit board you can use to prototype custom circuitry. It provides power supply rails and several convenient I/O connectors. It may be mounted on any of Mosaic's Controllers, Docking Panels or PowerDock and derives its power from the Wildcard Bus. You can also operate it stand-alone if you provide power to it.

The Screw Terminal Wildcard allows you to easily connect to the logic or field sides of any Wildcard using handy screw terminals. Each board provides 24 terminals rated at 2 A and 300 VDC (limited by the included ribbon cable). Be careful not to confuse the current and voltage rating of the Screw Terminal Module with the current and voltage limits of the module you are connecting to. These simple connections are ideal for prototyping and breadboarding your product.

The Signal Conditioning Wildcard™ is used with the Analog I/O Wildcard to increase its input and output voltage range and to add 4-20 mA current input and output capability.

The Signal Conditioning Wildcard amplifies four DAC outputs on the Analog I/O Wildcard to provide 0 to 10V outputs and attenuates four A/D inputs to allow voltages up to 10 volts. It also converts the other four DAC outputs on the Analog I/O Wildcard to 0 to 20 mA outputs and converts the other four A/D inputs to 0 to 20 mA inputs.

The UART Wildcard™ implements two full-duplex serial ports that can be configured for RS232, RS422, and RS485 protocols with data rates up to 56000 baud. Optional handshaking signals enable a modem connection for remote communications via any phone line. Dual 16-byte FIFO (first-in/first-out) buffers on each port reduce processor overhead when sending and receiving serial data streams.

The USB Wildcard™ implements a standard USB (Universal Serial Bus) interface that enables a PC host to communicate with Mosaic's embedded computers for data logging, data acquisition, high-performance measurements and instrument control. The USB Wildcard complies with the “Full Speed” USB peripheral device standard. Data rates on the USB cable exceed 2.4 Megabits per second (MBit/s), and benchmarked end-to-end throughput on a PDQ Board exceeds 320 MBit/s.

See also → Single Board Computers