PCIe with serial RS-232 interfaces inclusive current

Advantages

  • Serial devices receive a power supply
  • Serial cards optionally support a voltage of 5 V or 12 V at pin 1/4/8/9

What distinguishes these cards?

Additional to the standard RS-232 interface, these PCIe cards have a special feature. They provide current-carrying serial interfaces up to 2 A, whereby connected devices can be supplied with power. Here, a jumper can be used to manually switch between a voltage of 5 or 12 V to ensure operation of the respective connected device. The cards differ firstly in respect of their data transfer rates and secondly in the current-carrying pins.

This technology is used, among other things, in the area of security systems or in POS systems (Point of Sale), explicitly in cash register systems. Barcode scanners or card readers, for example, are then connected here, which in turn are supplied with power via the current-carrying interface. An additional power supply unit is therefore not necessary.

Subdivision by current-carrying pins

Pin 1/4/8/9

For the cards with a data transfer rate of 230.4 Kbps, the voltage can be set individually at the single ports. The current that the interface draws internally via the computer's power supply can be routed via pins 1, 4, 8 and 9 respectively. Thus, the voltage requirement of the external devices can be achieved (see article [1] and [2]).

Pin 1/9

For another group of cards, the current drawn from the PC's internal power supply and thus the voltage supply can be provided via pins 1 and 9. With some cards a significantly higher data transfer rate of up to 921.6 Kbps is possible, see articles [3] to [5]. In articles [6] to [8], the data transfer rates again vary, whereby here, too, voltage can be supplied internally via pin 1 and 9.

[1] Item 89909
PCI Express Card to 2 x Serial RS-232

Connectors:
      external
      1 x DB44 female
      Connecting cable: DB44 male > 2 x serial RS-232 DB9 male
      internal
      1 x PCI Express x1, V2.0
      1 x power connector 4 pin Molex male
Data transfer rate up to 230.4 Kbps
±15 kV ESD protection on all signal pins
5 V / 12 V can be set for each port through the jumper (Pin 1/4/8/9)

[2] Item 89895
PCI Express Card to 4 x Serial RS-232

Same specifications like [1], but:

Connecting cable: DB44 male > 4 x Serial RS-232 DB9 male

The cards [1] + [2] are equipped with D-Sub connectors and D-Sub screw nuts.

[3] Item 95244
Module MiniPCIe I/O PCIe full size 4 x Serial RS-232

Connectors:
      on the module
      4 x 10 pin pin header male
      on standard slot bracket
      2 x serial RS-232 DB9 male with screw nuts
      or on low profile slot bracket
      1 x serial RS-232 DB9 male with screw nuts
Data transfer rate up to 921.6 Kbps
Selectable voltage supply 5 V / 12 V or RI

[4] Item 89333
PCI Express Card to 1 x Serial RS-232

Connectors:
      external
      1 x Serial RS-232 DB9 male
      internal
      1 x PCI Express x1, V2.0
      1 x 4 pin Molex power connector
Data transfer rate up to 921.6 Kbps
±15 kV ESD protection for all signals
Selectable voltage supply 5 V / 12 V on RI (pin 9), and on DCD (pin 1)

[5] Item 89335
PCI Express Card to 4 x Serial RS-232

Connectors:
      external
      1 x DB44 female
      Connecting cable: DB44 male > 4 x Serial RS-232 DB9 male
      internal
      1 x PCI Express x1, V2.0
      1 x 4 pin Molex power connector
Data transfer rate up to 921.6 Kbps
±15 kV ESD protection for all signals
Selectable voltage supply 5 V / 12 V on RI (pin 9), and on DCD (pin 1)

[6] Item 89938
PCI Express Card to 4 x Serial RS-232

Connectors:
      external
      1 x DB44 female
      Connecting cable: DB44 male > 4 x serial RS-232 DB9 male
      internal
      1 x PCI Express x1, V1.1
      1 x SATA 15 pin plug
Data transfer rate up to 230.4 Kbps
Selectable voltage supply 5 V / 12 V on RI (pin 9), and on DCD (pin 1)

[7] Item 90293
PCI Express Card to 1 x Serial RS-232

Connectors:
      external
      1 x serial RS-232 DB9 male
      internal
      1 x PCI Express x1, V1.1
      1 x SATA 15 pin male
Data transfer rate up to 115.2 Kbps
±15 kV ESD protection for all serial signals meets IEC1000-4-2 standard
Selectable voltage supply 5 V / 12 V on RI (pin 9), and on DCD (pin 1)

[8] Item 89447
PCI Express Card to 4 x Serial RS-232

Connectors:
      external
      1 x DB44 female
      Connecting cable: DB44 male > 4 x serial RS-232 DB9 male
      internal
      1 x PCI Express x1, V2.0
      1 x SATA 15 pin male
Data transfer rate up to 115.2 Kbps
±15 kV ESD protection for all serial signals meets IEC1000-4-2 standard
Selectable voltage supply 5 V / 12 V on RI (pin 9), and on DCD (pin 1)

This card comes with 8 additional thumbscrews, so serial devices can be connected to the ports either with nuts or with screws.
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