Tektronix Colorado Data Systems 53A-334 User manual

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53A-334 REED RELAY SCANNER CARD
OPERATING MANUAL
•
Copyright 1990 by
Colorado Data Systems, Inc.
ASubsidiary of Tektronix
Englewood, CO 80110
All rights reserved.
Printed in U.S.A.
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03/13/92 8801-02-B
through
8909-02-D

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WARRANTY
Colorado Data Systems, Inc. (CDS) products (hardware and firmware) are warranted against
defects in materials and workmanship, and are warranted to meet the performance
specifications as listed in the current catalog and/or data sheet for the specific product being
warranted. This warranty applies for three (3) years following the date of shipment. CDS will,
at its option, repair or replace, at no cost to the customer, products which prove to be defective
during the warranty period, provided the defect or failure is not due to misuse or abuse of the
product. The customer is responsible for shipment of the defective product to the CDS factory.
Software products are supplied on a site license basis subject to the same performance warranty
provisions; the materials and distribution provision applies to the distribution media only. NO
OTHER WARRANTY IS EXPRESSED OR IMPLIED, INCLUDING WARRANTY FOR
FITNESS OF PURPOSE. CDS SHALL, IN NO CASE. BE LIABLE FOR CONSEQUENTIAL
DAMAGES.

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53A-334 REED RELAY SCANNER CARD
OPERATING MANUAL
DESCRIPTION 1
CONTROLS AND INDICATORS
Address Select Switch 2
Power LED 2
Fuses 2
Function LEDs and Switches 2
SPECIFICATIONS 6
OPERATION
Overview 9
Card Commands 9
INSTALLATION 11
APPENDIX A
53B/53A/63A SYSTEM COMMANDS 12
APPENDIX B
PIN ASSIGNMENTS FOR THE FRONT-EDGE CONNECTOR 13
APPENDIX C
HIGH VOLTAGE SWITCHING WITH THE 53A-334 14

53A-334 REED RELAY SCANNER CARD
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DESCRIPTION
The 53A-334 Reed Relay Scanner Card is a printed circuit board assembly for use in a CDS
53/63 Series Systems. The 53A-334 Card provides 32 1-wire channels of analog-signal
acquisition at a maximum switching rate of 350 channels per second. Up to ten 53A-334 Cards
can be plugged into one 53 Series Card Cage to allow scanning of up to 320 channels. The 63
Series Card Cage can accommodate up to five 53A-334 Cards which allows scanning of up to
160 channels. As many as ten 53/63 Series Card Cages can be configured together to provide
either a 53 Series System with up to 3,200 1-wire channels, or a 63 Series System with up to
1,600 channels. The 53A-334 Card may be mixed with other 53/63 Series System scanner cards
(53A-33X Series) in the same card cage.
Achannel may be selected (closed) randomly by transmitting ASCII characters from the system
controller to the 53/63 Series System. The on-board diagnostic features include 14 indicator
LEDs and channel status readback. During channel status readback, the 53A-334 Card returns
a2-digit decimal number to the system controller indicating the number of the closed channel.
The readback feature uses a third pole on each relay to provide a complete on-board self-test
capability which includes testing the relay coil. If more than one relay is closed
simultaneously, an error code is generated.
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334 - 1

CONTROLS AND INDICATORS
Address Select Switch
The 53A-334 Card has a miniature 10-position switch that selects the 53A-334 Card's address
(0-9) in the 53/63 Series System. The switch's cover opens to allow the address to be reselected.
Ascrewdriver with a narrow, flat blade should be used to turn the cam-action wiper to the
desired address position.
Power LED
The Power LED provides a valuable diagnostic tool by giving the system programmer a visual
indication of the action which the system is currently taking. Whenever the 53A-334 Card is
addressed by the system controller, the Power LED goes out. The LED remains out until
another function card is addressed. Since only one function card can be addressed at a time,
an unlit Power LED indicates the function card with which the system controller is currently
communicating. The Power LED being lit not only indicates that the 53A-334 Card is
unaddressed, but that all required dc power (5 V dc) is being supplied.
Fuses
The 5-volt dc power bus has a fuse that protects the system from overloads. If the fuse has
blown, the power LED will not light.
Function LEDs and Switches
Channel LEDs
The column of 14 LEDs near the front-edge connector indicate the specific scanner channel
closed. If the closed channel is between 0 and 9, the OX LED and one of the LEDs marked 0
through 9 is lit; if the closed channel is between 10 and 19, the IX LED and one of the LEDs
marked 0 through 9 is lit. For a channel between 20 and 29, the 2X LED and one of the 0
through 9 LEDs is lit. For channel 30 and 31, the 3X LED and either the 0 or 1 LEDs are lit.
Any other combination of lit LEDs indicates an error.
Halt Switch
This 2-position slide switch is located near the top center of the 53A-334 Card. It selects the
state of the 53A-334 Card after an @XH (Halt) or STOP command is received by the 53/63
Series System.
a. If the Halt switch is in the ON position, then the 53A-334 Card is reset to its power
up state, ail parameters are reset to their default values, and the Power LED is it.
b. If the Halt switch is in the OFF position, then the card becomes unaddressed, the
Power LED is lit, and any command being output by the system controller is
aborted. Any data capturing in progress stops. The data already in storage and the
capture specifications remain unaffected.
Analog Bus Switches
These three 1-section rocker switches are located near the bottom center of the 53A-334 Card.
These switches connect the common output lines of the scanner (Common High and GND or Ext
Ref) to the analog backplane bus of the 53/63 Series Card Cage (Backplane High and Backplane
Low).
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334 - 2

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Switch Positions:
Backplane HI/LO Reference Connections
CI Cl X The scanned channel input line is connected to
COMMON HI. The ANALOG BUS is not
connected to the scanner channels.
CI C2 C1 The scanned channel input line is not connected
to any front edge or backplane pins. GND is
connected to COMMON HI. The backplane is
not connected to the scanner channels.
CI C2 C2 The scanned channel input line is not connected
to any front edge or backplane pins. EXT REF
is connected to COMMON HI. The backplane is
not connected to the scanner channels.
C2 Cl CI The scanned channel input line is connected to
both backplane H and to COMMON HI. GND is
connected to backplane L.
C2 CI C2 The scanned channel input line is connected to
both backplane H and to COMMON HI. REF is
connected to backplane L.
C2 C2 Cl The scanned channel input line is connected to
backplane L. GND is connected to both
backplane L and to COMMON HI.
C2 C2 C2 The scanned channel input line is connected to
backplane L. EXT REF is connected to both
backplane L and to COMMON HI.
where:
XThe connection is valid regardless of the switch position.
Backplane H Backplane pin 45, ANALOG BUS H.
Backplane L Backplane pin 42, ANALOG BUS L.
GND Front edge pins 23, 24, AA and BB.
EXT REF Front edge pins 21, 22, Y and Z.
COMMON HI Front edge pins 18, V.
334 - 3

•
504
111
05011
05111 05012
OS 112
cCE
D501
HALT
SWITCH
05113 05114
D5116
05115
05117
05119 05118
05211
05212 05213
ANALOG BUS
SWITCHES SPEED SELECT
SNITCH
REFERENCE
[931 5932 5933
HI/LO
I„,g"I
P
S85
BACKPLANE
•
0
SCAN CLEAR
SWITCH
F
S76
ADDRESS
SNITCH
577
Ir
Figure 334-1: 53A-334 Card Switch Locations
334 - 4
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Scan Clear Switch
At the back of the 53A-334 Card (see Figure 334-1) is a 1-section rocker switch, the Scan Clear
switch, that determines if the card is to open all its channels when a channel is closed on
another 53/63 Series System scanner card.
Rocker Position Results
Cl Aclosed channel on this 53A-334 Card is opened when a channel is
closed on another 53/63 Series System scanner card. Closing a channel
on this card sends a scan clear pulse to all other scanner cards.
C2 Closing channels on other scanner cards has no effect on this 53A-334
Card. When a channel is closed on this card, a scan clear pulse is not
sent to other scanner cards.
Speed Select Switch
At the back of the 53A-334 Card is a 2-position rocker switch, the Select switch (see Figure
334-1). This switch selects the switching rate for this card: 150 channels per second (cps) or 350
cps. It also determines if the scanner-card's slow/fast status is sent to the slow/fast line on the
53/63 System Backplane and to the front edge of the 53A-334 Card.
The purpose of the slow/fast line is to slow down operation of the card when used in a system
with slower scanners, thus preventing the card from closing a relay before a relay on another
slower card has opened. (To locate the slow/fast line on the Backplane and on the front edge
connector, refer to Appendix B and to the Service Manual schematic.)
Rocker Position Results
Cl, C3 If the previous channel closed is on this or another high- speed scanner
card, then closing a channel on this 53A-334 Card occurs immediately.
Otherwise channels switch at 150 cps. Other high-speed cards will
receive status from this 53A-334 Card. NOTE: The Scan Clear Switch
must, be in the Cl position.
C2, C3 If the previous channel closed was on this 53A-334 Card, then closing
achannel on this card occurs immediately. Otherwise channels switch
at 150 cps. Other high-speed cards will not receive slow/fast status
from this card. NOTE: The Scan Clear switch may be in either Cl or
C2 position.
Cl, C4 Channels switch at 150 cps. Other high-speed cards will receive slow
status from this card. NOTE: The Scan Clear switch must be in the Cl
position.
C2, C4 Channels on this card will switch at 150 cps. Other high- speed cards
will not receive fast or slow status from this card. NOTE: The Scan
Clear switch may be in either CI or C2 position.
NOTE: For most applications, the Speed Select switch should be set to position CI, C3, and
the Scan Clear switch must be in the Cl position.
334 - 5

SPECIFICATIONS
Channel Configuration:
Signal Path Low Input:
Relay Configuration:
Relay Manufacturer:
Contacts:
Power:
Voltage:
Current:
Resistance:
32 channels, single line, one signal path closed at any
time.
Switch selectable between 53A-334 Signal Ground and
user supplied common external reference.
16 dry-reed relays, 3-pole, form A.
2additional dry-reed, 3-pole, form A relays to select
between poles 1 and 2 of the first 16 relays. The third
pole of all relays is used for read-back and self-testing.
Coto model 3600-0031 or equivalent.
10 W, maximum resistive.
200 V dc (see Appendix C).
40 V Peak ac.
0.5 A, maximum switching.
Initial - less than 100 milliohms.
End of reed life - less than 1 ohm.
Reed Life: At least 10' operations/channel at a rated load of 10 W.
Duty: Continuous.
Dielectric Strength: 250V (between contacts).
Scanning Ratq: Random channels selected at up to 350 channels per
second.
Signal Path Specifications
NOTE: These specifications include the effects of the card cage backplane; they
are valid at the analog output connector on the backplane:
Single-Line Thermal Offset: Less than 75 µV.
Initial Signal Path Resistance: Less than 600 milliohms.
Final Signal Path Resistance: Less than 1.4 ohms.
(end of reed life)
Insulation Resistance: Greater than 10 gigaohms between all insulated parts.
334 - 6