Sensory Science 7405 User Manual

INSTRUCTION MANUAL

Sensoray Model 7405

STDbus Analog Output Card

01/10/2000

Sensoray Co., Inc.

7313 SW Tech Center Dr., Tigard, Oregon 97223

voice: 503.684.8005, fax: [phone], e-mail: [e-mail]

www.sensoray.com

M A N U A L 4 2 6

Limited Warranty

Sensoray Company, Incorporated (Sensoray) warrants the
model 7405 hardware to be free from defects in material and
workmanship and perform to applicable published Sensoray
specifications for two years from the date of shipment to
purchaser. Sensoray will, at its option, repair or replace
equipment that proves to be defective during the warranty
period. This warranty includes parts and labor.

The warranty provided herein does not cover equipment
subjected to abuse, misuse, accident, alteration, neglect, or
unauthorized repair or installation. Sensoray shall have the
right of final determination as to the existence and cause of
defect.

As for items repaired or replaced under warranty, the
warranty shall continue in effect for the remainder of the
original warranty period, or for ninety days following date of
shipment by Sensoray of the repaired or replaced part,
whichever period is longer.

A Return Material Authorization (RMA) number must be
obtained from the factory and clearly marked on the outside
of the package before any equipment will be accepted for
warranty work. Sensoray will pay the shipping costs of
returning to the owner parts which are covered by warranty.

Sensoray believes that the information in this manual is
accurate. The document has been carefully reviewed for
technical accuracy. In the event that technical or
typographical errors exist, Sensoray reserves the right to
make changes to subsequent editions of this document
without prior notice to holders of this edition. The reader
should consult Sensoray if errors are suspected. In no event
shall Sensoray be liable for any damages arising out of or
related to this document or the information contained in it.

EXCEPT AS SPECIFIED HEREIN, SENSORAY MAKES
NO WARRANTIES, EXPRESS OR IMPLIED, AND
SPECIFICALLY DISCLAIMS ANY WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE. CUSTOMER’S RIGHT TO
RECOVER DAMAGES CAUSED BY FAULT OR
NEGLIGENCE ON THE PART OF SENSORAY SHALL
BE LIMITED TO THE AMOUNT THERETOFORE PAID
BY THE CUSTOMER. SENSORAY WILL NOT BE
LIABLE FOR DAMAGES RESULTING FROM LOSS OF
DATA, PROFITS, USE OF PRODUCTS, OR
INCIDENTAL OR CONSEQUENTIAL DAMAGES,
EVEN IF ADVISED OF THE POSSIBILITY THEREOF.

Special Handling Instructions

1. Do not remove the 7405 from its protective antistatic
bag until you are ready to install it in your computer.

2. Handle the 7405 only at grounded, ESD protected
stations.

3. Always turn off the computer before installing or
removing the 7405 board.

All brand, product and company names are trademarks or
registered trademarks of their respective owners.

Introduction

The Model 7405 board interfaces eight analog output
channels directly to the STDbus. Each channel may be
independently configured for either voltage or current
output. The voltage or current output from each channel is a
linear function of that channel’s applied digital value.

When programmed for voltage output, a channel will
generate a voltage between -10 and +10 volts. Careful
attention to circuit design on the Model 7405 makes this
voltage range possible, even when powering the STDbus
from ±12 volt power supplies.

Upon board reset, all channels are automatically initialized
to their appropriate zero-output conditions. Voltage-mode
channels default to zero volts out, and current-mode
channels reset to four milliamps out.

A 40-pin flat cable connector is provided for making
connections to the analog output channels. The connector
may be wired to an optional Sensoray Model 7409TB or
7409TC screw termination board, or to a termination system
customized for the target application.

Two STDbus I/O addresses are occupied by the Model 7405.
These two consecutive addresses may be mapped anywhere
in the STDbus eight-bit I/O address space.

Specifications

Specification Value

Input power
(excluding output drive)

Operating temperature -25°C to +85°C
D/A resolution 12 bits
Channel update rate 20KHz, min. (single channel rate)
Output linearity error 0.03%, max.
Analog output modes Voltage out: ±10V

±12.0 to ±15VDC, 80mA max.
+5.0VDC, 100mA max.

Current out: 4 to 20 mA

The Model 7405 board contains CMOS circuitry that is
sensitive to Electrostatic Discharge (ESD). Special care
should be taken in handling, transporting, and installing the
7405 to prevent ESD damage to the board. In particular:

Sensoray Model 7405 Instruction Manual — Page 2

Hardware Configuration

The Model 7405 requires the installation of programming
shunts to select various options such as I/O port addresses
and channel operating modes. This section describes these
configuration options.

After configuring the option shunts, the Model 7405 may be
installed in your STDbus backplane and programmed as
explained in the Programming section of this manual.

Both board address and channel output types are established
by installing programming shunts at various locations on the
board. In all of the following discussions of shunt
programming, I denotes an installed programming shunt and
R indicates that no shunt is installed:

Symbol Meaning

I Shunt installed
R Shunt removed

Defaults

most significant address nibble, and the table on the right for
the least significant address nibble.

E7 E6 E5 E4 Val E3 E2 E1 Val

I I I I 0 I I I 0
I I I R 1 I I R 2
I I R I 2 I R I 4
I I R R 3 I R R 6
I R I I 4 R I I 8
I R I R 5 R I R A
I R R I 6 R R I C

I R R R 7 R R R E
R I I I 8
R I I R 9
R I R I A
R I R R B
R R I I C
R R I R D
R R R I E
R R R R F

All option jumpers are set to a standard default configuration
at the factory. If the default configuration is consistent with
your application, you may be able to use the board without
having to reconfigure any jumpers.

Attribute Default

I/O base address 0xB2
I/O Space Primary
Analog channel mode Voltage out

I/O Space

Two separate I/O spaces exist on the STDbus: primary and
expanded. Option jumper E8 selects which I/O space the

Model 7405 board will reside in. E8 is factory set to map the
board into primary space.

E8 I/O Address Space

I Primary
R Expanded

I/O Port Mapping

The Model 7405 occupies two consecutive 8-bit addresses in
the selected STDbus I/O address space. These ports may be
mapped to any even address from 0x00 to 0xFE. Jumpers
are factory installed to locate the board at ports 0xB2 and
0xB3.

The following tables show the jumper configurations for all
possible board addresses. Use the table on the left for the

Channel Mode

Each channel has three mode control option jumpers, used to
select either voltage or current output mode. A channel’s
mode control jumpers work as a set. For any given channel,
either all jumpers should be installed or all should be
removed. A jumper set should be installed to configure the
associated channel for current output. Conversely, the
jumper set should be removed to configure the channel for
voltage output.

Channel Jumper Set

0 A0 B0 D0
1 A1 B1 D1
2 A2 B2 D2
3 A3 B3 D3
4 A4 B4 D4
5 A5 B5 D5
6 A6 B6 D6
7 A7 B7 D7

For example, jumpers A3, B3 and D3 must all be installed to
configure channel 3 for the 4-20mA current output mode.
Jumpers A7, B7 and D7 must all be removed to configure
channel 7 for the ±10 volt output mode.

Programming

Programming of the Model 7405 is accomplished by means
of three STDbus interface registers. One register is used to
let the host processor know when new data may be sent to
the board. The other two registers receive a combination of
channel number and analog channel data from the host.

Sensoray Model 7405 Instruction Manual — Page 3