TEWS TECHNOLOGIES Introduces PMC with 16 or 8 Channel Voltage & Current Range D/A and 20 Channel LVTTL/TTL Digital I/O

August 29, 2017 TEWS TECHNOLOGIES GmbH

The TPMC542 is a standard single-wide PCI Mezzanine Card (PMC) module offering 16 or 8 channels of simultaneous update single-ended unipolar/bipolar 16-bit analog output and 20 channels of tristate capable 5V-tolerant LVTTL/TTL digital input/output. Released as an extension to TEWS’ growing portfolio of PMC modules, the TPMC542 is designed for industrial control, telecommunication infrastructure, medical equipment, traffic control and COTS applications.

A 32-bit 33 MHz PCI interface is provided via PMC P11 and P12 connectors. The digital I/O signals and analog output signals are accessible via a Mini D Ribbon (MDR68) type front I/O connector.

For each individual D/A channel, following output ranges are configurable:

• 0V to 5V Voltage Range

• 0V to 10V Voltage Range

• ±5V Voltage Range

• ±10V Voltage Range

• 4mA to 20mA Current Range

• 0mA to 20mA Current Range

• 0mA to 24mA Current Range

Additionally, for each Voltage Range a 20% over-range may be enabled.

The TPMC542 provides a D/A Sequencer unit for periodic simultaneous digital to analog conversions at a configurable conversion rate. In sequencer mode, the D/A conversion data is fetched from buffers in host memory by PCI master DMA transfer and is temporarily stored in an on-board data buffer. The Sequencer provides a Frame Mode used for repetitive frames of simultaneous D/A conversions on a frame trigger signal event.

If the card is operating as a master card in a Multi-Board configuration the conversion clock (conversion rate) and frame trigger signals may be generated on-board for internal use and may also be driven out on P14 rear I/O. If the card is operating as a target card in a Multi-Board configuration the conversion clock (conversion rate) and frame trigger signals may be sourced externally via the P14 rear I/O interface as well.

Each TPMC542 is factory calibrated. The correction data is stored in an on-board serial EEPROM unique to each PMC module. These correction values may be used to perform a hardware correction for every D/A channel and output range.

The digital I/O lines are ESD protected. Each digital I/O line has a dedicated line transmitter with individual output enable control and a dedicated line receiver. The line receivers are always enabled, so the digital I/O line level can always be monitored. Each digital I/O line input is capable of generating an interrupt triggered on rising edge, falling edge or both.

Additionally, a debounce filter can be configured to eliminate bouncing on the digital I/O inputs. Each digital I/O line has a 4.7kΩ pull resistor to a common reference. The common pull resistor reference is programmable by software (one setting for all digital I/O lines) to +3.3V, +5V or GND.

The module offers an operating temperature range of -40°C to +85°C. All TEWS TECHNOLOGIES products feature a five-year warranty.

Extensive software support for major operating systems such as Windows, Linux, VxWorks, Integrity and QNX is available.


TEWS TECHNOLOGIES is a leading solutions provider of embedded I/O and CPU products based on open architecture standards such as PMC, XMC, IndustryPack® (IP), CompactPCI, standard PCI, PCIe, mPCIe, AMC, FMC, and VME. TEWS has more than 30 years of experience designing and building turn-key embedded interface solutions using the philosophy to listen and respond to our customers’ needs. Using this ‘customer first’ approach, TEWS has developed a large number of standard and custom products for industrial control, telecommunication infrastructure, medical equipment, traffic control and COTS applications. TEWS’ line of embedded I/O solutions is available worldwide through a global network of distributors. For more information, go to www.tews.com.

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