Isolated RS232 serial communications
Supports TX, RTS, and CTS.
ACCES I/O Products Inc.’s mPCIe-ICM PCI Express Mini Cards measure just 30 x 51 mm and are fitted with four or two ports of isolated RS232 serial communications for use in harsh environments in automation applications.
Isolated serial communications have 1.5 kV isolation port-to-computer and 500 V isolation port-to-port on all signals at the I/O connectors. RS232 ports are compatible with industry-standard serial COM devices, and support TX, RX, RTS and CTS.
The card provides ±15 kV ESD on all signal pins to protect against damage to sensitive electronic devices due to electrostatic discharge. They’re outfitted with Tru-Iso to provide port-to-port and port-to-PC isolation.
Serial ports are accessed using a low-profile, latching, 5-pin Hirose connector. Optional breakout cables are available, and bring each port connection to a panel-mountable DB9-M with an industry compatible RS232 pin-out.
The cards, which meet RoHS standards and handle operating temperatures between -40 to 85 degrees C, were designed using 16C950 UARTS and use 128-byte transmit/receive FIFO buffers to decrease CPU loading and protect against lost data in multitasking systems.
They’re software compatible with current PCI 16550 type UART applications and maintain backward compatibility, useful in applications where there are high common-mode external voltages, such as factory automation, energy management, and manufacturing test and process monitoring.
Isolation is required to guard electronics from transient voltage spikes and offers greater common-mode noise rejection in electrically noisy surroundings containing industrial machinery and inductive loads.
ACCES I/O Products Inc. is a manufacturer of data acquisition equipment based in San Diego, Calif.