Application: HVAC maintenance
Quatech Products Used: SSPXP-200/300 single port RS-422/485 Serial ExpressCard

A major HVAC manufacturer has developed a building automation service tool that requires and RS-485 serial port interface. The system enables field technicians to communicate with large HVAC installations to change configurations and troubleshoot malfunctioning units. A laptop running specially designed software interfaces to an RS-485 half-duplex link that has up to 64 HVAC unit controllers on it. Quatech's SSPXP-200/300 provides the RS-485 serial port to the laptop.

• New generation of I/O expansion for notebooks
• Adds 1 or 2 high-speed PCIe-based serial ports
• Adds 1 USB 2.0-based serial port
• Supports PCI Express Base Specification Revision 1.1a
• Adds 1 true parallel port
• Installs in any ExpressCard slot
• Built-in 1024-byte FIFOs buffers increase data transmit/receive speed
• Baud rates up to 921.6Kbps (for SSPXP & DSPXP models)
• Baud rates up to 115.2 Kbps with 16550-based serial units (for SSPX model)
• Hot plugging and how swapping features
• High speed ExpressCard with plug-n-play
• Supports Windows XP/Vista operating systems
• 5 year warranty

SSPXP-100
SSPXP-200/300

DSPXP-100
DSPXP-200/300

Bus Interface:
ExpressCard Standard, Release 1.1 compliant PCI Express Base Specification, Revision 1.1 compliant interface

OS Support:
Windows XP/Vista

Baud Rate: (SSPXP, DSPXP, QSPXP)
921.6 kbps per port

Serial Ports:
SSPXP: 1
DSPXP: 2
QSPXP: 4

UARTS:
16450/550/750-compatible register set

Data FIFO:
1024-byte

Data Bits:
Supports 5, 6, 7, 8
Supports even, odd, mark, space and no parity
Supports 1, 1.5 and 2 stop bits

SSPXP/DSPXP/QSPXP-100:
TIA-232-F (RS-232) compliant

SSPXP/DSPXP/QSPXP-200/300:
TIA-400-B (RS-422) and TIA-485-A (RS-485) compliant

200/300 Series:

• Supports full-duplex and RTS, DTR or automatic transmitter control half-duplex
• Selectable receiver control (echo/no echo)
• Selectable RTS/CTS, TxCLK/RxCLK or loopback auxiliary data pair
• Full fail-safe (open and short) 1/8 load receivers

Applications:

• Cellular Network Performance Testing
• Vehicle Diagnostics
• Radiation Mapping
• Service Technician HVAC Systems
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