User's Manual

PMAC2A PC104 Hardware Reference Manual
2 Introduction
Option 10: Firmware Version Specification
Normally the PMAC2A PC/104 is provided with the newest released firmware version. A label on the
memory IC shows the firmware version loaded at the factory. Option 10 provides for a user-specified
firmware version.
Option 12: Analog-to-Digital Converters
Option 12 permits the installation of two channels of on-board analog-to-digital converters with ±10V
input range and 12-bits resolution. The key component installed with this option is U20.
Additional Accessories
Acc-1P: Axis Expansion Piggyback Board
Acc-1P provides four additional channels axis interface circuitry for a total of eight servo channels, each
including:
• 12-bit ±10V analog output
• Pulse-and-direction digital outputs
• 3-channel differential/single-ended encoder input
• Four input flags, two output flags
• Three PWM top-and-bottom pairs (unbuffered)
Acc-1P Option 1: I/O Ports
Option 1 provides the following ports on the Acc-1P axes expansion board for digital I/O connections.
• Multiplexer Port: This connector provides eight input lines and eight output lines at TTL levels.
When using the PMAC Acc-34x type boards these lines allow multiplexing large numbers of
inputs and outputs on the port. Up to 32 of the multiplexed I/O boards may be daisy-chained on
the port, in any combination.
• I/O Port: This port provides eight general-purpose digital inputs and eight general-purpose digital
outputs at 5 to 24Vdc levels. This 34-pin connector was designed for easy interface to OPTO-22
or equivalent optically isolated I/O modules when different voltage levels or opto-isolation to the
PMAC2A PC/104 is necessary.
• Handwheel port: this port provides two extra channels, each jumper selectable between encoder
input or pulse output.
Acc-1P Option 2: Analog-to-Digital Converters
Option 2 permits the installation on the Acc-1P of two channels of analog-to-digital converters with ±10V
input range and 12-bits resolution. The key component installed with this option is U20.
Acc-2P: Communications Board
Without any options, the PMAC2A PC/104 communicates through the RS-232 serial interface (using the
optional Acc-3L flat cable) or PC/104 bus. This board provides added communication and I/O features.
Acc-2P Option 1A: USB Interface
Option 1A it provides a 480 Mbit/sec USB 2.0 interface.
Acc-2P Option 1B: Ethernet Interface
Option 1B provides a 100 Mbit/sec Ethernet.
Acc-2P Option 2: DPRAM Circuitry
Option 2 provides an 8K x 16 dual-ported RAM used with USB, Ethernet or PC/104 bus applications. If
using for USB or Ethernet communications, Acc-2P-Opt-1A or Acc-2P-Opt-1B must be ordered. If used