PMC Module

PMC-ENCDAC
6 Ch. Isolated Motion Control Interface on PMC

· 6 encoder differential RS-422/485 inputs with 4X quadrature resolution

· 6 channels of 12-bit or 16-bit digital to analog conversion, +/-5V or +/-10V range

· 18 digital inputs, 12 digital outputs. Inputs can be used as interrupt sources.

· All analog and digital I/O is optically isolated. 

· Interval and watchdog timers, buffered watchdog event output

· PMC PCI Mezzanine Card Form Factor
 
Specifications
Ordering Information
Description:
[Product Image]
The PMC-Encoder-DAC is a general purpose I/O resource for motion control applications.  The functions of A-quad-B encoder tracking counters,  with DAC analog outputs, plus multiple digital I/O and onboard timers, can be used to implement custom motor or robotic control.  The quadrature decoder inputs typically measure linear or shaft rotation position,  the analog outputs adjust the controlling motor velocity.  The six quadrature decoders take differential RS-422/485 inputs and increment or decrement 16 bit counters with overflow interrupts.  The 6 DACs are available in either 12-bit or 16-bit resolution with voltage outputs in either +10V or +5V ranges. Secondary functions include the interval timer and watchdog timer. The interval timer regulates the process sampling time either by polling or interrupt, the watchdog timer provides a security against PC CPU failure.  All user I/O is optically isolated from the PCI interface.
 

Power for the DAC's, DAC output amps, encoder differential receivers, and digital I/O,  is provided by the user.  The absence of this user supplied power is remotely sensed by the PCI interface. At powerup and until programmed by the CPU, the DACs are set to zero volts. 
All interrupts are maskable and power up in the masked state.  Registers and commands on the board are accessed via I/O or memory space over the PCI bus. 
All I/O is via an 80-pin front panel connector for easy cable attachment.
 
Specifications
Analog Outputs:
 Number of channels: 6
 Resolution: 12-bit or 16-bit versions available
 Output voltage ranges: +10V or +5V
Temperature Drift: <50 ppm/°C
Converter Setting time: 4us typ.

 Encoder Inputs, Tracking Counters:
 Number of channels: 6
 Max encoder tracking freq.:2 MHz
 Counter Size: 16 bits with interrupt on over or underflow.        Resets to zero.
 Inputs:  Diff RS-422-A, RS-485-A
 State: Vid hgh >0.2V, low < -0.2V
 Input com mode volt: max +7V
 Input Differential volt: max +6V
 Input impedance:  110 ohms

Digital Inputs:
 Number of channels: 18
 Assertion: polled or interrupt with mask for either edge.  Single ended Input: HCPL-0630 LED w/470 ohm pullup to IsoVcc.

Timers:
 1 watchdog programmed to set all digital outputs and analog outputs to off, 1 interval with interrupt.
 Resolution: 1us
 Range: 4us to 71 minutes
 FET-Buffered current-sinking watchdog output for external  relay operation.

Isolation:
 Optical isolation of all I/O

Digital Outputs:
 Number of channels: 12
 Single ended Output: HCPL-0630 w/2.2K pullup to IsoVcc.

Programming Interface:
 Registers: encoder counts, DAC values, interrupt mask, interrupt status, digital I/O direction, digital I/O status, various command settings.

PCI access wait states:
 Register accesses: zero wait states

Interrupts:
 From each encoder overflow or underflow, each digital input. Each interrupt is maskable.

 PCI bus:
 32/16 bit memory target accesses, interface VLSI: PLX 9050

I/O Connectors:
 J1: 80 pin, AMP *AMPMODU System 50* Part No. 104069-3 mounted at front panel. (Cable receptacle connector is Part No. 1-111196-5 for 32 AWG ribbon cable on .025" centerline)

Dimensions:
 74 x 149 mm

User supplied Isolated I/O power:
850mA @ 5V typical
120mA @+15V,-15V typical

PMC Power requirements:
1.75A @ 5V typical 

Environmental:
 Operating Temperature: 0 to 70°C
 Humidity: 5 to 95% non-cond
 Storage Temp: -20 to +85°C
 

All specifications subject to change without notice.
 
 I/O Cable Pin Assignment
1 Chl 1DAC 21 Chl 2 B- 41 Isol Vcc 61 DigIn03
2 Isol Vdd 22 Chl 2 B+ 42 Isol Vcc 62 DigIn04
3 Chl 2DAC 23 Chl 3 A- 43 DigOut01 63 DigIn05
4 Isol Agnd 24 Chl 3 A+ 44 DigOut02 64 DigIn06
5 Chl 3DAC 25 Chl 3 B- 45 Isol Dgnd 65 Isol Dgnd
6 Isol Agnd 26 Chl 3 B+ 46 DigOut03 66 DigIn07
7 Chl 4DAC 27 Chl 4 A- 47 DigOut04 67 DigIn08
8 Isol Agnd 28 Chl 4 A+ 48 DigOut05 68 DigIn09
9 Chl 5DAC 29 Chl 4 B- 49 DigOut06 69 DigIn10
10 Isol Agnd 30 Chl 4 B+ 50 Isol Dgnd 70 Isol Dgnd
11 Chl 6DAC 31 Chl 5 A- 51 DigOut07 71 DigIn11
12 Isol Agnd 32 Chl 5 A+ 52 DigOut08 72 DigIn12
13 Isol Gnd 33 Chl 5 B- 53 DigOut09 73 DigIn13
14 Isol Vee 34 Chl 5 B+ 54 DigOut10 74 DigIn14
15 Chl 1 A- 35 Chl 6 A- 55 Isol Dgnd 75 Isol Dgnd
16 Chl 1 A+ 36 Chl 6 A+ 56 DigOut11 76 DigIn15
17 Chl 1 B- 37 Chl 6 B- 57 DigOut12 77 DigIn16
18 Chl 1 B+ 38 Chl 6 B+ 58 DigIn01 78 DigIn17
19 Chl 2 A- 39 Isol Vcc 59 DigIn02 79 DigIn18
20 Chl 2 A+ 40 Isol Vcc 60 Isol Dgnd 80 Isol Dgnd
Ordering Information:
PMC-ENCDAC-12    - PCI Bus Encoder DAC: 6 Encoder In, 6 DACs  12-bit resolution, 30 Dig I/O
PMC-ENCDAC-16    - PCI Bus Encoder DAC: 6 Encoder In, 6 DACs  16-bit resolution, 30 Dig I/O
PMC-CABLE80-80   - 80 pin flat cable in 2', 4', or 6'
PMC-ASMBLY-IO    - 4' 80 pin cable to 80 pos terminal block module 
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Copyright © 1998 Vigilant Technologies, Inc.
 Last modified: Mar 20, 2007
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