Performance Motion Devices PR8358120, User Manual

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Electrical Reference
Prodigy/CME PC/104 User’s Guide
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4.2.7 Sync I/O Connector
The two Sync I/O connectors located on the Prodigy/CME PC/104 card (J3 and J4 in Figure 4-1 on page 69) allow
for the synchronization of multiple Prodigy/CME PC/104 cards within a single system. This configuration enables
operation within the same cycle period. If multiple cards are installed, yet not inter-connected, any additional cards
would begin working after the first card (master) was initialized. However, none of the axes would be synchronized.
With Sync I/O activated, the servo loops of all slave cards are synchronized to the servo loop of the master card. This
allows for precise synchronization of all implemented axes.
To connect two or more Prodigy/CME PC/104 cards for synchronization, a Sync I/O cable (one cable for each set
of two cards) is required. This cable may be connected to either of the two Sync I/O connectors on the cards. Both
connectors function as either an input or output; the two sync connectors are wired in parallel. For more information
on synchronizing multiple Prodigy/CME PC/104 cards, see the
Magellan Motion Processor User’s Guide.
The pinouts for the Sync I/O connectors are defined in the following table:
The following diagram shows three synchronized Cards.
Figure 4-4:
Sync I/O
connector to
three cards
4.2.8 CAN Connectors
The Prodigy/CME PC/104 card’s controller area network (CAN) transceivers are designed for use with CAN
controllers, or with equivalent devices. They are intended for use in applications employing the CAN serial
communication physical layer in accordance with the ISO 11898 standard. The transceiver provides differential
transmit and differential receive capability to/from a CAN controller at speeds up to 1 Mbps.
The CAN connector (J16) is an 8-pin header-style connector. Termination at each end of the cable run is generally
recommended unless cable lengths are very short and speed is slow. ISO-11898 requires 120 ohm termination at each
end of the bus. Note that it is up to the customer to verify their network topology and operating parameters.
See Section 2.5.3, “CANbus Communications,” on page 47 for more information on the functionality of the CANbus
port.
10 GND Ground Ground Ground
Pin
Number Signal
J3, J4
1 Sync-in or sync-out pin, depending on whether the card is master or slave.
2 GND
Pin Connection RS232 RS485 Full Duplex RS485 Half Duplex
Master
Slave Slave