Technobox, Inc. | PMC/XMC Boards & Embedded Solutions
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We offer a variety of mezzanine board solutions for supplemental I/O used in embedded systems. Designs address applications from convection-cooled PMCs with 4 ports to a unique family of XMCs featuring mix-and-match modularity, from which a collection of 4, 8 or 16-port I/O modules can be built and delivered with limited lead times.

 
 
 

16-Port RS422 - 121 ohms Parallel Termination on Receive Side Only; TXD, RXD (V61 P15) w/PN4, no P16 (9119)

16-Port RS422 - 121 ohms Parallel Termination on Receive Side Only; TXD, RXD (V61 P15) w/PN4, no P16 (9119)

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Our 16-Port RS422 - 121 ohms Parallel Termination on Receive Side Only; TXD, RXD (V61 P15) w/PN4, no P16 features the XR17V358 controller and can support up to 16 UART based ports at RS232, RS422, and RS485 electrical levels. Ports may be manufactured to support Digital I/O.

RoHS Compliant
Lead-Free
Industrial Temperature

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Product Information

The Technobox, Inc. P/N 9119 16-Port RS422 - 121 ohms Parallel Termination on Receive Side Only; TXD, RXD (V61 P15) w/PN4, no P16 features the XR17V358 controller and can support up to 16 UART based ports at RS232, RS422, and RS485 electrical levels. Ports may be manufactured to support Digital I/O.

The design is exceptionally versatile and is partitioned into eight “sections,” each manufactured to support any of the following:

  • RS232 - standard 8 COM port signals

  • RS422 – standard 4 COM port signals (RXD,TXD,RTS,CTS)

  • “Split partitioning” of the section into two independent functions.

When a section is configured for “Split partitioning,” each half of the section is manufactured to support any of the following:

  • RS232 - standard 4 COM port signals (RXD, TXD,RTS,CTS)

  • RS422 - standard 2 COM port signals (RXD,TXD) RS485 - bidirectional RS485 data on one differential pair (TX, RXD)

  • GPIO - two bits of General Purpose, series terminated Digital IO.

  • Note that when at least one section is split, a second XR17V358 UART is populated on the board.

As a result of the adapter’s architecture, many combinations of I/O signaling levels can be quickly realized. For example, all ports may be 8 signal RS232 COM ports, using one XR17V358 chip. All ports may be 4 signal RS232 COM ports (RXD,RXD, CTS,RTS), with two UART chips populated. Furthermore, customer-specific applications requiring mix of various interfaces - RS232,RS422, RS485 and GPIO - is easily achieved.

To facilitate quick turn delivery to customers, a ready inventory of partially assembled boards is kept in stock. The secondary side is populated the same way for all configurations, consisting of mostly bypass capacitors and common elements. When a customer order is received, the primary side is then populated appropriately, resulting in the customer required configuration. Changes in termination resistances, XMC connector (VITA 42 or VITA 61), which are variations on the primary side population, are easily and quickly accomplished.

Employing this unique method of selective population results in highly reliable, highly configurable Async boards without using any jumpers, plug-on mezzanines, or complex FPGAs. The XR17V358 has exceptional features providing advanced high-performance Asynchronous communications.   The standard 16550 UART is implemented.  But additional operational modes allow deep FIFOs (256 bytes), automatic flow control (CTS/RTS or XON/XOFF), RS485 direction control, and baud rates to 31.25 Mbaud based on an internally generated 125 MHz clock, or 15.625 Mbaud for the second XR17V385 chip (see datasheet).

Other XMC orderable part numbers can be assigned for customer-specific configurations that go well beyond the products listed above. This adapter does not support front panel I/O access to the ports. But a similar product that removes the PN4 and P16 connectors and routes port signals to the front panel connector is available.

Various carrier cards are available for system development, deployment and test of the PN4 and P16 connectors in user friendly form factors.   For example, P/N 4821 breaks out the P16 connector to pin headers. P/N 5933 connects the PN4 connector to a VME J2 style connector. P/N 8260 connects the PN4 and the J16 connector to a 68-pin front panel connector for easy access and cable prototyping. Many other carrier and adapter accessories are available. This product is built with industrial temperature range parts (-40 to +85 C) and is RoHS compliant.

 

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