VersaLogic VL-12CT96 User manual

ReferenceReference
ManualManual
VL-12CT96
VL-12CT97
VL-12CT98
Analog & Digital Input/Output
Card for the STD 32 Bus

ii VL-12CT96/7 Analog & Digital I/O Card

VL-12CT96/7 Analog & Digital I/O Card iii
Table of Contents
1. Overview
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
2. Configuration
Jumper Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
VL-12CT96/7 Jumper Block Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
VL-12CT96/7 Jumper Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Board Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
8-Bit Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
16-Bit Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
IOEXP Signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Data Bus Width. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Analog Input Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Single Ended Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Pseudo-Differential Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Differential Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . 2-10
Current Loop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Input Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Settling Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Low Pass Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Input Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
Analog Output Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Output Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Output Local/Remote Sense. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Output Current Loop Option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Output Voltage Loopback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
5B01 Analog Signal Conditioning Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
Digital Input/Output Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
Rack Power Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
Digital I/O Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
Edge Selection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
Interrupt Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
3. Installation
Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Signal Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Priority Chain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
External Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
J1 — Analog Input Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
J2 — Analog Output Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
J3 — Digital I/O Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Table of Contents

iv VL-12CT96/7 Analog & Digital I/O Card
Table of Contents
4. Registers
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
I/O Port Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Analog Input Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Analog InputWrite Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Channel Select Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Convert Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Clear Flags Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Analog Input Read Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Status Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Analog Input Data Low Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Analog Input Data High Register. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Analog Input Data Representation (VL-12CT96, 12-Bit) . . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Analog Input Data Representation (VL-12CT97, 16-Bit) . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Analog Output Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Analog Output Data Low Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Analog Output Data High Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Analog Output Data Representation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Parallel Port Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
Signal Direction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . 4-12
Parallel Port Data High Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
Parallel Port Data Low Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
5. Operation
Analog Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Polled Mode Analog Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Interrupt Mode Analog Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Analog Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . 5-3
Digital I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Signal Direction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3
Signal Inversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Digital Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Interrupt Mode Digital Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
Digital Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . 5-4
System Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4
6. Software Examples
Analog Input Code Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Analog Input Interrupt Mode Code Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Analog Output Code Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
Parallel Port Code Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5
Parallel Port Interrupt Mode Code Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
7. Calibration
Analog Input Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1
Analog Output Calibration (Voltage Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2
Analog Output Calibration (Current Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
8. Reference
STD 80 Bus Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1
STD 32 Bus Pinout Extension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2
VL-12CT96/7 Parts Placement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-3
VL-12CT96/7 Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-4
VL-12CT96/7 Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-8

VL-12CT96/7 Analog & Digital I/O Card 1-1
Overview
This manual details the installation and operation of VersaLogic’s VL-12CT96 and VL-12CT97
multifunction I/O cards. The VL-12CT96/7 cards include analog input, analog output, digital I/O, and
extended temperature operation. The VL-12CT96 has a 12-bit analog input converter, while the VL-
12CT97 has a 16-bit converter.
Introduction
The VL-12CT96/7 provides 16 single-ended, or 8 differential analog input channels (12-bit resolution
for the VL-12CT96 or 16-bit resolution for the VL-12CT97). Four of the input channels may optionally
be configured for current loop input. The cards feature fast 10 µs conversion times, and on-board DC
toDC converters (requires+5 voltsupply only). They operatewith inputranges of ±5 volts or±10 volts
(also ±50 mv or ±100 mv on the VL-12CT96). They can accommodate input signals in single-ended,
differential,orpseudo-differential configurations. Throughput upto100KHz may berealizedon these
cards.
The VL-12CT96/7 cards also include two 12-bit analog output channels. These channels may be
jumpered for ±5 volt or ±10 volt output at 5 ma. One channel may optionally be converted to a 4-20
ma output.
In addition to the analog sections, these cards also include 16 digital I/O lines. These digital lines
feature open-collector outputs with readback and are compatible with optically isolated modular I/O
racks.
Features
•Analog Input:Analog Input:
Analog Input:Analog Input:
Analog Input:
8 Differential or 16 Single-Ended Input Channels
12-bit (VL-12CT96) or 16-bit (VL-12CT97) Resolution
±5V and ±10V Input Ranges
±50 mv and ±100 mv optional range on the VL-12CT96
Current Loop Input Option (4 channels)
Selectable Low Pass Filter
10 Microsecond Conversion Time
Auto Channel Increment Mode
Interrupt Support
5B01 Compatible Pinout
•Analog Output:Analog Output:
Analog Output:Analog Output:
Analog Output:
2 Output Channels
12-bit Resolution
Independent ±5V and ±10V Output Ranges
Current Loop Option (1 Channel)
•Digital Input/Output:Digital Input/Output:
Digital Input/Output:Digital Input/Output:
Digital Input/Output:
16 Channel Opto 22 Compatible
Interrupt Support
Opto 22 Compatible Pinout
TTL Compatible
•Extended Temperature OperationExtended Temperature Operation
Extended Temperature OperationExtended Temperature Operation
Extended Temperature Operation
•STD 32 (8- or 16-Bit Data), STD 80, STD Z80 CompatibleSTD 32 (8- or 16-Bit Data), STD 80, STD Z80 Compatible
STD 32 (8- or 16-Bit Data), STD 80, STD Z80 CompatibleSTD 32 (8- or 16-Bit Data), STD 80, STD Z80 Compatible
STD 32 (8- or 16-Bit Data), STD 80, STD Z80 Compatible
Overview

1-2 VL-12CT96/7 Analog & Digital I/O Card
Specifications
Specifications are typical at 25°C with 5.0V supply unless otherwise noted.
Size:Size:
Size:Size:
Size: Meets all STD & STD 32 Bus mechanical specifications
Storage Temperature:Storage Temperature:
Storage Temperature:Storage Temperature:
Storage Temperature: –40°C to +85°C
Free Air Operating Temperature:Free Air Operating Temperature:
Free Air Operating Temperature:Free Air Operating Temperature:
Free Air Operating Temperature: –25°C to +85°C
Power Requirements:Power Requirements:
Power Requirements:Power Requirements:
Power Requirements: 5V ±5% @ 485 mA typ.
Analog Input:Analog Input:
Analog Input:Analog Input:
Analog Input:
16 single ended or 8 differential channels
±50 mv, ±100 mv, ±5V, ±10V ranges
Resolution:
VL-12CT96: 12-bit, no missing codes
VL-12CT97: 16-bit, no missing codes
Accuracy (±5V or ±10V ranges):
VL-12CT96: ±0.022%
VL-12CT97: ±0.003%
10 µs conversion time
5 µs or 10µs settling time
±35 volt input overvoltage protection
.6 x 108Ωinput impedance
2.5 µA input bias current
±12 volt common-mode range
89 dB common-mode rejection (gain=1)
Analog Output:Analog Output:
Analog Output:Analog Output:
Analog Output:
2 channels
±5V or ±10V ranges
1 optional current loop output
15 µs settling time
Resolution: 12-bit
Accuracy: ±0.024%
5 ma maximum output current (per channel)
Digital I/O:Digital I/O:
Digital I/O:Digital I/O:
Digital I/O:
16 lines
Open collector
.7V maximum @ 12 ma low level output
Analog Temperature Coefficients:Analog Temperature Coefficients:
Analog Temperature Coefficients:Analog Temperature Coefficients:
Analog Temperature Coefficients:
Gain ±25 ppm/°C of FSR
Offset ±10 ppm/°C of FSR
Addressing:Addressing:
Addressing:Addressing:
Addressing: I/O, 8- or 16-bits plus IOEXP
Mapping:Mapping:
Mapping:Mapping:
Mapping: 16-byte block on any 16-byte boundary
Bus Compatibility:Bus Compatibility:
Bus Compatibility:Bus Compatibility:
Bus Compatibility:
STD Z80: Full compliance, all bus speeds
STD 80: Full compliance, all bus speeds
STD 32: I/O slave, SA16, SA8-I, IX
Specifications are subject to change without notice.
Overview

VL-12CT96/7 Analog & Digital I/O Card 2-1
Configuration
Jumper Options
Various options available on the VL-12CT96/7 cards are selected using removable jumper blocks
(shorting plugs). Features are selected or deselected by installing or removing the jumpers as noted.
Theterms“In”or“Jumpered”areusedtoindicateaninstalledplug;“Out”or“Open”areusedtoindicate
a removed plug.
Figure2-1showsthejumperblocklocationsontheVL-12CT96/7card. Thefiguresindicatetheposition
of the jumpers as shipped from the factory.
Configuration

2-2 VL-12CT96/7 Analog & Digital I/O Card
VL-12CT96/7 Jumper Block Locations
Figure 2-1. Jumper Block Locations for VL-12CT96/7
Configuration — Jumper Block Locations

VL-12CT96/7 Analog & Digital I/O Card 2-3
VL-12CT96/7 Jumper Options
JumperJumper
JumperJumper
Jumper AsAs
AsAs
As
BlockBlock
BlockBlock
Block DescriptionDescription
DescriptionDescription
Description ShippedShipped
ShippedShipped
Shipped PagePage
PagePage
Page
V1[1-2] InputMode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . SingleEnded 2-8
In – Single-Ended or Pseudo-Differential
Out – Differential
V1[3-4] InputGain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Normal 2-12
In – x100
Out – Normal
V1[5-6] InputMode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . SingleEnded 2-8
In – Pseudo-Differential
Out – Single-Ended or Differential
V1[7-8] InputMode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . SingleEnded 2-8
In – Differential
Out – Single-Ended or Pseudo-Differential
V1[9-10] InputMode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SingleEnded 2-8
In – Single-Ended
Out – Differential or Pseudo-Differential
V1[11-12] DifferentialBiasResistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . InCircuit 2-10
In – In Circuit
Out – Disconnected
V2[1-2] AnalogLoopback(Channel0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Independent 2-16
In – Connects DAC 0 output to ADC 0 input for diagnostic loopback
Out – Circuits operate independently
V2[3-4] AnalogLoopback(Channel1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Independent 2-16
In – Connects DAC 1 output to ADC 1 input for diagnostic loopback
Out – Circuits operate independently
V3[1-2] DACChannel 0 Remote Sense (IR Drop Compensation) . . . . . . . . . . . . . . . . . . . . . Localsense 2-15
In – Local sense (no compensation)
Out – Remote sense
V3[3-4] Channel0 Output Range (±5 VoltSelection) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±10V 2-15
In – ±5 Volts
Out – ±10 Volts
V3[5-6] Channel0 OutputRange(±10Volt Selection) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±10V 2-15
In – ±10 Volts
Out – ±5 Volts
V4[1-2] DACChannel 1 Remote Sense (IR Drop Compensation) . . . . . . . . . . . . . . . . . . . . . LocalSense 2-15
In – Local sense (no compensation)
Out – Remote sense
V4[3-4] Channel1 Output Range (±5 VoltSelection) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±10V 2-15
In – ±5 Volts
Out – ±10 Volts
V4[5-6] Channel1 OutputRange(±10Volt Selection) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±10V 2-15
In – ±10 Volts
Out – ±5 Volts
V5 Opto-22 I/O RackPower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . External 2-17
In – I/O rack power provided locally
Out – I/O rack power provided externally
V6[1-8] InputRange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±10V 2-12
[1-2] & [7-8] In – ±10 Volts
[3-4] & [5-6] In – ±5 Volts
V6[9-10] Input Low Pass Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Enabled 2-13
In – Enabled
Out – Disabled
V7[1-2] InputMode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . SingleEnded 2-8
In – Single-Ended or Pseudo-Differential
Out – Differential
V7[3-4] 5 µs Settling Delay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Enabled 2-13
In – Enabled
Out – Disabled
V7[5-6] 10 µs SettlingDelay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disabled 2-13
In – Enabled
Out – Disabled
V8[1-2] DataBusWidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-Bit 2-14
In – 8-Bit Data Bus
Out – 16-Bit Data Bus
V8[3-4] AnalogInputResolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Varies 2-14
In – 16-Bit Resolution (VL-12CT97 only)
Out – 12-Bit Resolution (VL-12CT96 only)
Configuration — Jumper Options

2-4 VL-12CT96/7 Analog & Digital I/O Card
JumperJumper
JumperJumper
Jumper AsAs
AsAs
As
BlockBlock
BlockBlock
Block DescriptionDescription
DescriptionDescription
Description ShippedShipped
ShippedShipped
Shipped PagePage
PagePage
Page
V9 Board Address (A8– A15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0300H 2-6
[1-2] = In – A15 Decoded Low [1-2] = Out – A15 Decoded High
[3-4] = In – A14 Decoded Low [3-4] = Out – A14 Decoded High
[5-6] = In – A13 Decoded Low [5-6] = Out – A13 Decoded High
[7-8] = In – A12 Decoded Low [7-8] = Out – A12 Decoded High
[9-10] = In – A11 Decoded Low [9-10] = Out – A11 Decoded High
[11-12] = In – A10 Decoded Low [11-12] = Out – A10 Decoded High
[13-14] = In – A9 Decoded Low [13-14] = Out – A9 Decoded High
[15-16] = In – A8 Decoded Low [15-16] = Out – A8 Decoded High
V10 IOEXPSelect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IOEXPIgnored 2-7
[1-2] = In – Board responds to IOEXP high and low (IOEXP ignored)
[2-3] = In – Board responds to IOEXP low
[Both] = Out – Board responds to IOEXP high
V11 AddressModeSelector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-Bit 2-5
[1-2] = In – 16-Bit Address Decoding
[3-4] = In – 8-Bit Address Decoding
V12 Board Address (A4 – A7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0300H 2-5
[1-2] = In – A7 Decoded Low [1-2] = Out – A7 Decoded High
[3-4] = In – A6 Decoded Low [3-4] = Out – A6 Decoded High
[5-6] = In – A5 Decoded Low [5-6] = Out – A5 Decoded High
[7-8] = In – A4 Decoded Low [7-8] = Out – A4 Decoded High
V13[1-2] ParallelPortInterruptEdgeSelector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rising Edge Only 2-18
In – Rising Edge Only
Out – Rising and Falling Edges
V13[3-4] ParallelPort InterruptSelect(Module 0). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Enabled 2-18
In – Activity on Module 0 (J3 Pin 31) generates interrupt request
Out – Disabled
V13[5-6] ParallelPort InterruptSelect(Module 1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disabled 2-18
In – Activity on Module 1 (J3 Pin 29) generates interrupt request
Out – Disabled
V13[7-8] ParallelPort InterruptSelect(Module 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disabled 2-18
In – Activity on Module 2 (J3 Pin 27) generates interrupt request
Out – Disabled
V13[9-10] ParallelPort InterruptSelect(Module 3). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disabled 2-18
In – Activity on Module 3 (J3 Pin 25) generates interrupt request
Out – Disabled
V14[1-2] Use STD BusIRQx to carry parallelport interrupt signal . . . . . . . . . . . . . . . . . . . . . . Disabled 2-19
In – Connects parallel port interrupt circuitry to STD Bus IRQx (E47)
Out – Frees IRQx to be used for other purposes
V14[2-3] Use STD Bus IRQx to carryADC conversion complete interrupt. . . . . . . . . . . . . . . . Disabled 2-19
In – Connects ADC interrupt circuitry to STD Bus IRQx (E47)
Out – Frees IRQx to be used for other purposes
V15[1-2] Use STD BusIRQ* to carry parallelport interruptsignal . . . . . . . . . . . . . . . . . . . . . . Disabled 2-19
In – Connects parallel port interrupt circuitry to STD Bus IRQ* (P44)
Out – Frees IRQ* to be used for other purposes
V15[2-3] Use STD Bus IRQ* tocarry ADC conversion complete interrupt . . . . . . . . . . . . . . . . Enabled 2-19
In – Connects ADC interrupt circuitry to STD Bus IRQ* (P44)
Out – Frees IRQ* to be used for other purposes
V16[1-2] Use STD BusIRQ1* to carryparallel port interruptsignal . . . . . . . . . . . . . . . . . . . . . Enabled 2-19
In – Connects parallel port interrupt circuitry to STD Bus IRQ1* (P37)
Out – Frees IRQ1* to be used for other purposes
V16[2-3] Use STD Bus IRQ1* to carry ADC conversion complete interrupt . . . . . . . . . . . . . . . Disabled 2-19
In – Connects ADC interrupt circuitry to STD Bus IRQ1* (P37)
Out – Frees IRQ1* to be used for other purposes
V17[1-2] Use STD BusIRQ2* to carryparallel port interruptsignal . . . . . . . . . . . . . . . . . . . . . Disabled 2-19
In – Connects parallel port interrupt circuitry to STD Bus IRQ2* (P50)
Out – Frees IRQ2* to be used for other purposes
V17[2-3] Use STD Bus IRQ2* to carry ADC conversion complete interrupt . . . . . . . . . . . . . . . Disabled 2-19
In – Connects ADC interrupt circuitry to STD Bus IRQ2* (P50)
Out – Frees IRQ2* to be used for other purposes
V18[1-2] Use STD BusIRQ3* to carryparallel port interruptsignal . . . . . . . . . . . . . . . . . . . . . Disabled 2-19
In – Connects parallel port interrupt circuitry to STD Bus IRQ3* (E67)
Out – Frees IRQ3* to be used for other purposes
V18[2-3] Use STD Bus IRQ3* to carry ADC conversion complete interrupt . . . . . . . . . . . . . . . Disabled 2-19
In – Connects ADC interrupt circuitry to STD Bus IRQ3* (E67)
Out – Frees IRQ3* to be used for other purposes
Figure 2-2. VL-12CT96/7 Jumper Functions
Configuration — Jumper Options

VL-12CT96/7 Analog & Digital I/O Card 2-5
Board Addressing
The VL-12CT96/7 card supports both 8- and 16-bit I/O addressing. 8-bit addressing is used with most
8-bitprocessors (Z80, 8085,6809, etc.) whichprovide 256 I/O addresses. 16-bit addressing can be used
with 16-bit processors (i.e. 8088, 80188, etc.) to decode up to 65536 I/O port addresses.
Both 8- and 16-bit addressing can be extended (capacity doubled) using the IOEXP signal which is
decoded on board.
As shipped, the board is configured for 16-bit addressing with a board address of hex 0300. The card
occupies sixteen consecutive I/O addresses (0300H to 030FH). Twelve of these addresses are mapped
to control, data, and status registers, the remaining four are inaccessible. See the I/O Port Mapping
section on page 4-1 for further information.
8-Bit Addressing
To configure the board for an 8-bit I/O address, refer to the figure below. Use the table to select the
jumpering for the appropriate upper hex digit of the desired starting address (i.e., “3” and “0” = hex
address 30). Note: the lower digit is always “0.”
V12 V12 V12 V12 Upper Lower
1-2 3-4 5-6 7-8 Digit Digit
XXXX0 Always “0”
XXX—1
XX—X2
XX——3
X—XX 4
X—X—5
X——X 6
X——— 7
—XXX8
—XX—9
—X—XA
—X——B
——X X C
——X—D
———X E
————F
X = Jumperinstalled
—= Jumperremoved
JumperJumper
JumperJumper
Jumper AsAs
AsAs
As
BlockBlock
BlockBlock
Block DescriptionDescription
DescriptionDescription
Description ShippedShipped
ShippedShipped
Shipped
V12 Board Address (A4 – A7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0300H(16-Bit)
[1-2] = In – A7 Decoded Low [1-2] = Out – A7 Decoded High
[3-4] = In – A6 Decoded Low [3-4] = Out – A6 Decoded High
[5-6] = In – A5 Decoded Low [5-6] = Out – A5 Decoded High
[7-8] = In – A4 Decoded Low [7-8] = Out – A4 Decoded High
Figure 2-3. 8-Bit Address Jumpers
Configuration — Board Addressing

2-6 VL-12CT96/7 Analog & Digital I/O Card
16-Bit Addressing
To configure the board for a 16-bit I/O address refer to the figure below. Use the table to select the
jumpering for the appropriate four hex digits of the desired starting address (i.e., “1” and “2” and “3”
and “0” = hex address 1230). Note: the lower digit is always “0.”
V9 V9 V9 V9 Upper V9 V9 V9 V9 2nd V12 V12 V12 V12 3rd Lower
1-2 3-4 5-6 7-8 Digit 9-10 11-12 13-14 15-16 Digit 1-2 3-4 5-6 7-8 Digit Digit
XXXX0 XXXX0 XXXX0 Always “0”
XXX—1 XXX—1 XXX—1
XX—X2 XX—X2 XX—X2
XX——3 XX——3 XX——3
X—XX 4 X—XX 4 X—XX 4
X—X—5 X—X—5 X—X—5
X——X 6 X——X 6 X——X 6
X——— 7 X——— 7 X——— 7
—XXX8 —XXX8 —XXX8
—XX—9 —XX—9 —XX—9
—X—XA —X—XA —X—XA
—X——B —X——B —X——B
——X X C ——X X C ——X X C
——X—D ——X—D ——X—D
———X E ———X E ———X E
————F ———— F ———— F
X = Jumper installed
-- = Jumper removed
JumperJumper
JumperJumper
Jumper AsAs
AsAs
As
BlockBlock
BlockBlock
Block DescriptionDescription
DescriptionDescription
Description ShippedShipped
ShippedShipped
Shipped
V9 Board Address (A8– A15) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0300H
[1-2] = In – A15 Decoded Low [1-2] = Out – A15 Decoded High
[3-4] = In – A14 Decoded Low [3-4] = Out – A14 Decoded High
[5-6] = In – A13 Decoded Low [5-6] = Out – A13 Decoded High
[7-8] = In – A12 Decoded Low [7-8] = Out – A12 Decoded High
[9-10] = In – A11 Decoded Low [9-10] = Out – A11 Decoded High
[11-12] = In – A10 Decoded Low [11-12] = Out – A10 Decoded High
[13-14] = In – A9 Decoded Low [13-14] = Out – A9 Decoded High
[15-16] = In – A8 Decoded Low [15-16] = Out – A8 Decoded High
V12 Board Address (A4 – A7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0300H
[1-2] = In – A7 Decoded Low [1-2] = Out – A7 Decoded High
[3-4] = In – A6 Decoded Low [3-4] = Out – A6 Decoded High
[5-6] = In – A5 Decoded Low [5-6] = Out – A5 Decoded High
[7-8] = In – A4 Decoded Low [7-8] = Out – A4 Decoded High
Figure 2-4. 16-Bit Address Jumpers
Configuration — Board Addressing

VL-12CT96/7 Analog & Digital I/O Card 2-7
IOEXP Signal
The IOEXP (I/O expansion) signal on the STD Bus is normally used to select between two different I/
O banks or maps. It can be used to double the number of available I/O addresses in the system (by
selecting between two banks of I/O boards). The IOEXP signal is usually controlled by (or jumpered
to ground on) the system CPU card.
A low IOEXP signal usually selects the standard or normal I/O map. A high IOEXP signal usually
selects the secondary or alternate I/O map. Boards that ignore (or do not decode) IOEXP will appear
in both I/O maps.
As shipped the IOEXP jumper is configured to ignore the IOEXP signal. The board will be addressed
whether the IOEXP signal is high or low. It can be jumpered for two other modes as shown below.
JumperJumper
JumperJumper
Jumper AsAs
AsAs
As
BlockBlock
BlockBlock
Block DescriptionDescription
DescriptionDescription
Description ShippedShipped
ShippedShipped
Shipped
V10 IOEXPSelect . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . IOEXPIgnored
[1-2] = In – Board responds to IOEXP high and low (IOEXP ignored)
[2-3] = In – Board responds to IOEXP low
[Both] = Out – Board responds to IOEXP high
Figure 2-5. IOEXP Options
Data Bus Width
The VL-12CT96/7 provides both 8-bit and 16-bit data paths to the bus. The 8-bit mode is compatible
with STD 80, STD Z80, and STD 32 bus specifications. The 16-bit mode is used only when operating
the card in an STD 32 card cage.
In8-bitmode,theregistermapfortheVL-12CT96/7isasupersetoftheAnalogDevicesRTI-1265board.
In 16-bit mode, the registers are remapped to even addresses for efficient I/O access. This allows the
full A/D data word to be read in a single bus cycle. See the I/O Port Mapping section on page 4-1 for
further information.
JumperJumper
JumperJumper
Jumper AsAs
AsAs
As
BlockBlock
BlockBlock
Block DescriptionDescription
DescriptionDescription
Description ShippedShipped
ShippedShipped
Shipped
V8[1-2] DataBusWidth. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-Bit
In – 8-Bit Data Bus
Out – 16-Bit Data Bus
Figure 2-14. Data Bus Width Jumper
Configuration — Board Addressing/Data Bus Width

2-8 VL-12CT96/7 Analog & Digital I/O Card
Analog Input Configuration
The VL-12CT96/7 board accommodates 16 single-ended or 8 differential input channels.
Input Mode
The board can be configured for three types of analog inputs: differential, single-ended, or pseudo-
differential. All inputs connected to the board must be of the same type.
When operated in differential mode, four channels can be configured to accept 4-20ma current loop
input.
Typical connections for the three input modes are shown in the figures below. Since ground loops
(current flowing between various equipment ground lines) affect analog measurements made with
reference to ground, careful attention should be paid to the ground connections shown. In particular,
theSTDBuspowersupplylogicgroundlineshouldneverbe connected to earth groundwhenoperating
in the differential or pseudo-differential modes.
Single Ended Mode
Single-endedmodeisusedforsignalsthatare referenced to a commonground. Itisnormallyusedonly
for higher level signals on short distance runs (less than 10 feet). 16 input channels are available in
single-ended mode.
AGND
CHANNEL 1
CHANNEL 0
OPTIONAL
V1
-
+
V0
-
+
As Shipped
V1
9
5
7
5
3
1
1
8
2
6
4
VL-12CT96
V6
VL-12CT97
9
11 12
10
8
10
2
4
6
7
9
5
3
1
V7
642
3
51
Figure 2-6. Single Ended Input Mode
Configuration — Analog Input

VL-12CT96/7 Analog & Digital I/O Card 2-9
Pseudo-Differential Mode
Pseudo-differential mode is used for signals that are not referenced to ground, but are all connected
toa single common return line. This mode canprovide most of the advantages of fulldifferential input
while requiring fewer total wires. 16 input channels are available in pseudo-differential mode. This
mode is used when connecting to a 5B01 signal conditioning rack.
P.D. SENSE
AGND
CHANNEL 1
CHANNEL 0
OPTIONAL
+
V1
-
V0
+
-
25
9
5
1
VL-12CT96
V1
1
7
11
9
3
5
562
8
10
12
4
69
7
10
8
VL-12CT97
1
3
V6
4
2
2
64
3
51
V7
Figure 2-7. Pseudo-Differential Input Mode
Configuration — Analog Input

2-10 VL-12CT96/7 Analog & Digital I/O Card
Differential Mode
Differential mode is used for signals that are not referenced to a common ground point. Each input
signalisrepresentedasavoltagedifferencebetweentwosignalconductors(usuallytwistedwires),and
is presented to the board as a (+) and (–) pair. Differential mode reduces the effects of electromagneti-
cally induced noise and ground currents in electrically noisy environments. It is especially useful in
eliminating the effects of common mode noise generated on input lines over longer distances. Eight
input channels are available in differential mode.
CHANNEL 1
CHANNEL 0
+
V1
-
V0
+
-
4
5
2
1
VL-12CT96
V1
11
9
5
3
7
1
12
10
6
4
8
7
9
8
10
VL-12CT97
2
3
1
5
2
4
6
V6
OPTIONAL
-
+
-
+
2
64
3
51
V7
SEE
TEXT
Figure 2-8. Differential Input Mode
Notethatin full differentialoperationa return pathmustbe provided forthebias currents oftheinput
amplifier. An on-board 1M Ωresistor is provided for this purpose. Jumper V1[11-12] should be
inserted.
In noisy electrical environments, the bias resistor should be located in close proximity to the voltage
source. Jumper V1[11-12] should be removed under these conditions.
JumperJumper
JumperJumper
Jumper AsAs
AsAs
As
BlockBlock
BlockBlock
Block DescriptionDescription
DescriptionDescription
Description ShippedShipped
ShippedShipped
Shipped
V1[11-12] DifferentialBiasResistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . In Circuit
In – In Circuit
Out – Disconnected
Figure 2-9. Bias Resistor
Configuration — Analog Input

VL-12CT96/7 Analog & Digital I/O Card 2-11
Current Loop Mode
Inadditionto voltage modeinputs, the VL-12CT96/7canaccept uptofour 4-20 macurrent loop inputs.
Channels 0 through 3 can be converted to current-loop input by installing 200 to 250 Ω, ¼W, 0.1%
precision resistors in locations R4 through R7 respectively.
The board must be jumpered for differential mode, and the input range should be jumpered for ±5V
operation when using current loop inputs. A signal proportional to the 4-20 ma current is developed
acrosstheprecisionresistors. ThisvoltageisappliedtotheVL-12CT96/7asadifferential-modesignal,
and is converted into digital values.
CHANNEL 0
LOOP
I
1
2
V1
11
9
7
3
5
1
10
12
31
5
8
4
6
9
7
2
4
6
V7
10
8
VL-12CT97
2
5
1
3
6
4
2
V6
VL-12CT96
R4
R5
R6
R7
+
-
Figure 2-10. Current Loop Input Mode
Configuration — Analog Input

2-12 VL-12CT96/7 Analog & Digital I/O Card
Input Range
The board may be operated with an input range of ±5 volts, ±10 volts, ±50 mv, or ±100 mv. To achieve
the maximum digital resolution and to prevent saturation, the range which most closely matches the
input signal should be chosen. All channels operate with the same input range.
Asshippedtheboardisconfiguredfor±10voltoperation. Itcan be jumpered for otherrangesasshown
below.
JumperJumper
JumperJumper
Jumper AsAs
AsAs
As
BlockBlock
BlockBlock
Block DescriptionDescription
DescriptionDescription
Description ShippedShipped
ShippedShipped
Shipped
V1[3-4] InputGain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Normal
In – x100
Out – Normal
V6[1-8] InputRange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ±10V
[1-2] & [7-8] In – ±10 Volts
[3-4] & [5-6] In – ±5 Volts
Figure 2-11. Input Range Jumper
Configuration — Analog Input

VL-12CT96/7 Analog & Digital I/O Card 2-13
SettlingTime
The VL-12CT96/7 board inserts a short delay between the time a channel is selected and time the A/
D conversion begins. The delay allows the multiplexer and associated circuitry to properly settle for
a more accurate reading.
The settling delay starts when the Channel Select register is written to by software, or when the Data
High register is read (in auto increment mode). After channel selection (during the settling time), the
A/D conversion cycle can be started by writing to the Convert register; however, the A/D converter is
not triggered until the delay time elapses. The time delay is not inserted when one channel is read
repeatedly.
The standard 5 µS delay (as shipped) is used for ±5V or ±10V input ranges. The longer 10 µS settling
delay is needed for the ±50 mv or ±100 mv input ranges.
Settling delay times can be selected as indicated in the figure below.
JumperJumper
JumperJumper
Jumper AsAs
AsAs
As
BlockBlock
BlockBlock
Block DescriptionDescription
DescriptionDescription
Description ShippedShipped
ShippedShipped
Shipped
V7[3-4] 5 µS SettlingDelay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Enabled
In – Enabled
Out – Disabled
V7[5-6] 10 µS SettlingDelay . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Disabled
In – Enabled
Out – Disabled
Figure 2-12. Settling Time Jumpers
Low Pass Filter
A 1 MHz low pass filter between the instrumentation amplifier and the A/D convertor can be selected
asshown in the figure below. Thisfilter is used to rejecthigh frequency noise and isnormally enabled.
JumperJumper
JumperJumper
Jumper AsAs
AsAs
As
BlockBlock
BlockBlock
Block DescriptionDescription
DescriptionDescription
Description ShippedShipped
ShippedShipped
Shipped
V6[9-10] Input Low Pass Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Enabled
In – Enabled
Out – Disabled
Figure 2-13. Low Pass Filter Jumper
Configuration — Analog Input

2-14 VL-12CT96/7 Analog & Digital I/O Card
InputResolution
TheVL-12CT96provides12bitsofresolution(4096digitalcounts). Forcorrectoperation,jumperV8[3-
4] should be removed. The VL-12CT97 provides 16 bits of resolution (65536 counts) for applications
which require finer resolution. For correct operation, jumper V8[3-4] should be inserted.
JumperJumper
JumperJumper
Jumper AsAs
AsAs
As
BlockBlock
BlockBlock
Block DescriptionDescription
DescriptionDescription
Description ShippedShipped
ShippedShipped
Shipped
V8[3-4] AnalogInputResolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Varies
In – 16-Bit Resolution (VL-12CT97 only)
Out – 12-Bit Resolution (VL-12CT96 only)
Figure 2-15. Input Range Selection
Analog Output Configuration
The VL-12CT96/7 board accommodates two analog output channels. Both output channels are single-
ended and are referenced to analog ground. The digital data format is two’s complement.
Configuration — Analog Input