User's Manual

PMAC VME Hardware Reference Manual
PMAC Basic Specifications 45
Acc-34: Optically isolated I/O board, 64-bits total, definable as inputs or outputs in blocks of 32
by software command. All I/O is sinking only, 5V to 24V, 400 mA. Provided with 24"
long, 26-pin cable (for 20MHz PMAC only).
OPT-1: DIN Rail mount
Acc-34A: Optically isolated I/O board, 64-bits total, sourcing or sinking inputs and outputs rated to
100 mA per point, 15V to 24V. The points can be selected for input or output by
software command, sourcing or sinking, in groups of eight by hardware configuration
(when ordering). The default configuration for Acc-34A is 32 inputs and 32 outputs, all
sourcing. Comes with 1 60-cm (24") cable to PMAC.
OPT-1: Custom configuration, sinking/sourcing in/out (Contact factory for form)
OPT-2: DIN Rail mount
OPT-3: All sinking configuration, 32 in, 32 out
Acc-34B: Optically isolated I/O board, 64-bits total, designed for easy connection to Opto-22 and
compatible boards (e.g. Opto-22 Models G4PB24 and G4PB16H) via standard 50-pin flat
cables (see Acc-21 cables). Both the inputs and the outputs are TTL compatible negative
logic (low true) types.
OPT-1: DIN Rail mount
Accessory 35: Multiplexer Port Line Driver and Receiver
PMAC’s Acc-35A and Acc-35B are two complementary printed circuit boards. These boards are
designed to provide differential signal transmission capability between PMAC and most of its accessories
that communicate via its JTHW connector. Currently, this accessory pair enables the following PMAC
accessories to communicate with PMAC via long distance cables:
Acc-8D Opt 7 (Resolver-to-Digital converter board)
Acc-8D Opt 9 (Yaskawa Encoder interface board)
Acc-18 (the Thumbwheel Multiplexer Board)
Acc-34 (the Opto 64 Bit input/output Board)
Acc-34A (the Opto 32-Bit Input/32-Bit Output board)
Acc-35A is the local JTHW buffer board. This board should be attached to PMAC’s JTHW connector via
the supplied 26-pin flat cable. Acc-35B is the remote JTHW buffer board. One Acc-35B is required per
each cluster of the remotely positioned I/O accessory boards. Note that the recommended cable length for
the direct connection of PMAC to any of the above accessories is less than 3 meters (10 feet). However
by buffering the signals through the Acc-35 pair, and by using twisted pair wires with proper shielding,
cable lengths in excess on 100 meters may be used.
Acc-35A: Thumbwheel port differential line driver w/1, 26-pin, 24" cable (Requires OPT 1 or 2)
Acc-35B: Thumbwheel port buffer differential line receiver with 1, 26-pin, 24" cable (Requires
Option 1 or 2)
OPT-1: DB37 connector for communication between the local and the remote buffers
OPT-2: 38-pin Phoenix terminal block connector for communication between the local and the
remote buffers (this is the default option
)
OPT-3: A 6 ft daisy-chain JTHW cable with four headers. This provides for the connection of up
to four I/O accessory boards to a single Acc-35.
Accessory 36: Analog to Digital Converter Board
PMAC’s Acc-36 is an analog data acquisition board capable of converting up to 16 analog input signals.
The Analog-to-Digital Converter (ADC) units used in Acc-36 are the MAX180 monolithic devices
manufactured by Maxim Integrated Products. These devices have 12-bit resolution with +/- 1/2 LSB
linearity specification.