Industry Pack Modules Industry Pack Modules IP502 Serial 485 Communication These modules provide an asynchronous serial communication interface for your system. The IP502 has four asynchronous, half-duplex RS485 serial ports. It provides a cost-efficient interface to RS485 The IP502 provides a cost-effective interface to RS485 networks. A variety of features add flexibility to handle more applications multi-driver networks which support up to 32 nodes. However, for full handshaking support, use the full- Environmental Specifications Operating temperature: 0 to 70°C. duplex IP501. RS485 Serial Ports Storage temperature: -40 to 125°C. Configuration: Four independent, non-isolated RS485 serial Software-configuration quickly sets the baud rate, Relative humidity: 5 to 95% non-condensing. ports with a common single return connection. character-size, stop bits, and parity. Power: Data rate: Programmable up to 512Kbps using internal baud +5V (±5%): 300mA maximum. For more efficient data processing, each serial port is rate generator and carrier 8MHz clock. Consult factory for ±12V (±5%) from P1: 0mA (not used) equipped with16-character FIFO buffers on the transmit custom baud rates up to 1M baud. MTBF: Consult factory. and receive lines. Interface: Asynchronous serial only. Max. cable length: 1200 meters (4000 feet) typical. A signal Ordering Information repeater can extend this limit. Features Character size: 5 to 8 bits, software-programmable.■Four asynchronous, half-duplex RS485 serial ports Industry Pack Modules Parity: Odd, even, or no parity; software-programmable. IP502 ■16-byte FIFO buffers Four RS485 serial ports. Stop bits: 1, 1-1/2, or 2 bits; software-programmable. ■Programmable baud rate (up to 512Kbps) For Industry Pack Carrier Cards, see Page 5. Data register buffers: 16-byte receive FIFO buffers and 16-byte (consult factory for custom rates up to 1M bps) transmit FIFO buffers. Customized Industry Pack Modules Interrupts: Receiver line status (overrun error, parity error, † ■Individually controlled interrupts 5027-x framing error, or break interrupt); received data available (unique vectors for each port) Modified IP502 with user specified crystal/baud rate. (FIFO level reached) or character time-out; transmitter holding register empty. Multiple ports share the IntReq0 † Specify x = crystal frequency when ordering. ■Line-break and false start-bit detection line according to a shifting priority scheme based on the Minimum quantity per order is two units. last interrupting port serviced. ■Industry-standard 16C550 family UART includes For Industry Pack Carrier Cards, see Page 5. software-compatible 16C450 mode UART Software (see Page 81) UART: Texas Instruments TL16C554FN. ® IPSW-API-VXW: VxWorks software support package Benefits IP Compliance (ANSI/VITA 4) ® IPSW-API-QNX: QNX software support package■Failsafe receivers guarantee a high output state when Meets IP specifications per ANSI/VITA 4-1995. ® IPSW-ATX-PCI: ActiveX /OLE Controls 2.0 software package the inputs are left open or floating. IP data transfer cycle types supported: For accessories information, see Page 87. Input/output (IOSel*), ID read (IDSel*).■Internal diagnostics help detect communication Access times (8MHz clock): faults. ID PROM read: 1 wait state (375nS cycle). ■16-byte FIFO buffers minimize CPU interaction for Channel register read/write: 2 wait states (500nS cycle). Interrupt select read: 2 wait states. improved system performance. Acromag, Inc.  PO Box 437, Wixom, MI 48393  Phone: 248-624-1541  Fax: 248-624-9234  solutions@acromag.com  www.acromag.com 33