Colorado Data Systems 53A-570 User manual

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•
53A-570 DIGITAL/SYNCHRO CARD
OPERATING MANUAL
•
°Copyright 1990 by
Colorado Data Systems, Inc.
Englewood, CO 80110
All rights reserved.
Printed in U.S.A.
•01/29/90 8707-04-A
through
8911-06-C

•
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.

•
•
•
53A-570 DIGITAL/SYNCHRO CARD
OPERATING MANUAL
DESCRIPTION 1
CONTROLS AND INDICATORS
Address-Select Switch 1
Power LED 1
Fuses 1
Function LEDS and Switches 2
Front Edge Connector Inputs And Outputs 3
Synchro-Analog Outputs 3
AC Reference Inputs 3
External +15V and -15V DC Inputs 3
SPECIFICATIONS 4
OPERATION
Overview 6
Card Commands 6
Synchro Output Polarity Convention 7
INSTALLATION 8
APPENDIX A
53/63 SERIES SYSTEM COMMANDS 9
APPENDIX B
INPUT/OUTPUT CONNECTIONS 10

53A-570 DIGITAL/SYNCHRO CARD
•DESCRIPTION
The 53A-570 Digital/Synchro Card is a printed circuit board assembly for use in a CDS 53/63
Series System. The 53A-570 Card contains one or two programmable 16-bit digital-to-synchro
converters with associated Scott T transformers. Each channel can be independently
programmed from 0 ° to 359.9999 ° in steps of 0.034 °. The 53A-570 is programmed by
transmitting ASCII characters from the system controller to the 53/63 Series System. The
ASCII characters transmitted (0.000000 to 0.999999) represent the desired synchro-analog
output angle as a fraction of 360 °.
CONTROLS AND INDICATORS
The following controls and indicators are provided to select and display the functions of the
53A-570 Card's operating environment.
Address-Select Switch
The 53A-570 Card has a miniature 10-position switch labeled "ADDRESS" that selects the
53A-570 Card's address (0-9) in the 53/63 Series System. The switch's cover opens to allow
the address to be reselected. A screwdriver 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-570 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-570 Card is
unaddressed, but that all required dc power (5V dc, ±15V dc) is being supplied.
Fuses
The 5V DC, +15V DC and -15V DC power buses each have a fuse that protects the system
from overloads. If a fuse has blown, the Power LED will not light.
NOTE: Due to the inrush current caused during power-up, there is a limit of 11
channels of resolvers or synchros allowed per card cage, unless an external
supply is provided for the ±15 volts DC.
For those applications that call for external power, the 53A-570 Card has provisions for
connecting an external ±15V DC supply to the card's front-edge connector. To connect an
external supply, the standard ±15V fuses must be removed from their locations next to the
Address Select Switch and relocated at optional fuse positions at the bottom of the card near
the front-edge connector. The pin assignments for the front-edge connector are: +15V Pins
23 and 24; -15V Pins AA and BB, Ground pins A through Z.
570 - 1

CAUTION:
If optional fuses are to be used, the fuses next to the Address Select switch must
be removed to prevent damage to the internal ±15V DC supplies.
QDI 0.0000° —89.9999°
QD2 90.0000° —179.9999°
QD3 180.0000° —269.9999°
QD4 270.0000° —359.9999°
Function LEDS and Switches
LEDs
The following LEDs are provided at the top front edge of the 53A-570 Card to indicate the
status of the card's operation:
Ouadrant LEDs
Each channel has four quadrant LEDs, labeled QD1, QD2, QD3, and QD4. The quadrant
LEDs for a channel indicate the last quadrant programmed for that channel. When the
53/63 Series system powers up, the Quadrant LEDs are unlit. They remain unlit until
achannel is programmed. The LEDs represent the following quadrants:
Switches
The following switches are provided to select the proper functions for the 53A-570 Card's
operating environment:
Halt Switch
This two-position slide switch is located near the card's backplane edge connector. It
selects the state of the 53A-570 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-570 Card is reset to its
power-up state, all parameters are reset to their default values, and the Power
LED is lit.
b. If the Halt Switch is in the OFF position, then the 53A-570 Card becomes
unaddressed, the Power LED is lit, and any programmed parameters of the card
remain unchanged.
Svnchro/Resolver Switch
Each channel has a two-section rocker switch that configures the channels for synchro
or resolver output. Both rocker switches must be set to position C2 for correct operation
of the 53A-570 Card. Position Cl is only used when the card has been factory
configured for resolver output.
o
570 - 2

Front Ed2e Connector Inputs And Outputs
•
•
Synchro-Analog Outputs
Each channel has three synchro-analog outputs that represent the programmed angular value
in synchro format.
AC Reference Inputs
Each channel has an independent AC reference input (Ref HI and Ref LO) that provides the
reference frequency for the synchro-analog outputs.
The polarity conventions for the synchro analog outputs and AC reference outputs are as
follows. SI, S2, and S3 are the synchro-analog outputs; RN! and Rw are the AC reference
inputs, high and low, respectively. 0 represents the position of the synchro shaft.
S3-SI = (Rtirrtio) sin 0
S2-S3 = (RH-Rw) sin (0 + 120 °)
SI-S2 = (RHrRLo) sin (0 + 240 °)
S3-S1 will be in phase with RHrRL0 when sin 0 is positive, and 180 degrees out of phase with
RHI-Rw when sin 0 is negative.
S2-S3 will be in phase with RHI-Rw when sin (0 + 120°) is positive, and 180 degrees out of
phase with RHI-Rw when sin (0 + 120 °) is negative.
SI-S2 will be in phase with RHI-Rw when sin (0 + 240 °) is positive, and 180 degrees out of
phase with RHI-Rw when sin (0 + 240 °) is negative. ,
CAUTION:
It is recommended that if measuring the synchro outputs with an oscilloscope, the
oscilloscope ground not be hooked to any of the outputs. Make a differential
measurement with two channels of the oscilloscope instead. Although the outputs
are isolated, and any one signal can be connected to ground, multiple outputs can
accidentally be shorted causing severe damage to the card.
External +I 5V and -I5V DC Inputs
A53A-062 internal ±15V DC power supply can deliver 2 amperes to a 53A System chassis. A
53A-070 internal ±15V DC power supply can deliver 1.5 amperes to a 63A System chassis.
Using multiple 53A-570 Cards or other function cards in the same system chassis that also
require ±15V DC power may exceed the capacities of these supplies. You can determine the
total amount of ±15V DC power required for a given card configuration using the data given
in the Specifications section (Power Requirements) of each card's operating manual. If the
system chassis demands additional power, external ±15V DC power can be applied through
four pins on the 53A-570 Card's front edge connector (pins 23 and 24 for +15V DC, pins AA
and BB for -I5V DC) or directly to the card cage backplane. To connect external ±15V DC
power to the card cage backplane, consult the factory for installation details.
CAUTION: See FUSES description above.

SPECIFICATIONS
Type Output*, Synchro, including Scott T transformer.
Number of Channels: One digital to synchro converter channel standard.
Second channel included when Option 001 is ordered.
Digital/Synchro Converter
Manufacturer: Natel model no. DSC 5101.
Significant Programming
Digits: Six decimal digits representing a fraction of 360 °.
Accuracy: 2.5 arc-minutes (includes both D/S and Scott T
transformer inaccuracies).
Resolution: 16 bits.
Frequency Ranee: 360 Hz to 440 Hz.
Reference Input: Input voltage (RHI, RLO): 22V RMS to 30V RMS (26V
RMS nominal).
Input impedance: 25 kohms (minimum).
Output
Output format: Synchro.
Output voltages (V RMS,
phase referenced to
Ref Hi-Ref Lo) S3-S1: 11.8 sin 0*, in phase.
52-S3: 11.8 sin (0 sin + 1200), in phase.
S1-S2: 11.8 sin (0 sin + 240 °), in phase.
Output current
(maximum per channel): 2 Volt amperes.
Programmed By: ASCII characters.
Power Reauirements: 5V and ±15V dc power is provided by the internal Power
Supply in the 53/63 Series Card Cage.
Voltage
(5-volt Supply): 4.75 V dc to 5.25 V dc.
Current 0.75 A, maximum quiescent, two channels.
(5-volt Supply): 0.80 A, peak, two channels.
Voltage +14.5 V dc to +15.5 V dc.
(±15-volt Supplies): -14.5 V dc to -15.5 V dc.
Current 0.064 amperes per channel, no load.
(+15-volt Supplies): 0.165 amperes per channel, full load.
570 - 4

•
•
•
Current
(-15V Supplies):
Cooling:
Temperature:
Humidity:
Dimensions:
Dimensions. Shipping:
Weight:
Weight. Shipping:
Mounting Positions:
Mounting Location:
Input/Output Connections:
Required Equipment
(not supplied):
Equipment Supplied:
0.060 amperes per channel, no load.
0.160 amperes per channel, full load.
Provided by the fan in the 53/63 Card Cage.
-10 °C to +65°C, operating (assumes ambient temperature
of 55° and airflow to assure less than 10°C temperature
rise).
-40°C to +85°C, storage.
Less than 95% R.H. noncondensing, -10°C to +30°C.
Less than 75% R.H. non-condensing, +31°C to +40'C.
Less than 45% R.H. non-condensing, +41°C to +55°C.
197 mm high, 220 mm deep, 13 mm wide.
(7.5" x 8.66" x 0.8").
When ordered with a 53/63 Card Cage, the card is
installed in one of the card cage's function-card slots.
When ordered alone, the shipping dimensions are:
254 mm x 254 mm x 127 mm. (10" x 10" x 5").
0.50 kg. (1.1 lbs).
When ordered with a 53/63 Card Cage, the card is
installed in one of the card cage's function card slots.
When ordered alone, the shipping weight is:
0.81 kg. (1.8 lbs).
Any orientation.
Installs in any function card slot of the 53/63 Card Cage.
A 48-pin card-edge hooded connector (53A-780) connects
to all front-edge input and output signals.
53A-780 Hooded Connector or 53A-739 Analog Cable is
required with this card.
53A-570 Digital/Synchro Card
Spare Fuses (Part# 42202-52003) - Qty. 2.
Operating Manual (Part* 00000-15700).
Service Manual (Part* 00000-25700).

OPERATION
Overview
The 53A-570 Card is programmed by ASCII characters issued from the system controller to the
53/63 Series system communications card. The 53A-570 Card interfaces to the communications
card through the 53 Series or 63 Series Card Cage's backplane.
When the 53/63 Series System powers up, the 53A-570 Card is unaddressed (power LED lit),
and both channels are at 0 °.
To address a function card for the first time, the system command @XY must be issued. X
is the card cage address (0-9) selected on the 53A-171 Control Card in the addressed card cage;
Yis the 53A-570 Card's address (0-9) within the addressed card cage. The 53A-570 Card's
address is selected using the card's Address-select switch. Once a function card is addressed,
it remains addressed until the system receives another @ character. Appendix A fully
discusses the @XY command and the other 53/63 Series System commands. After the 53A-570
Card is addressed, the commands listed below may be issued until another function card is
addressed.
Card Commands
The 53A-570 Card commands are as follows:
.zA
.zB
This command sets channel A to the output value specified by "Z",
where z represents a one to six digit decimal number in the range
0 to 999999. With the period, this number represents a fraction
of 360 °. If z is not specified, the output value defaults to zero.
This command sets channel B to the output value specified by "Z",
where z represents a one to six digit decimal number in the range
0to 999999. With the period, this number represents a fraction
of 360 °. If z is not specified, the output value defaults to zero.
If less than six digits are sent after the period, the digits are interpreted as the
most-significant digits of the fraction of 360 °.
Below are examples of these commands:
Command Action
@05.423A.985121B Sets channel A to 152.28 ° (360 ° x .423), and channel B to
354.6435 °. The 53A-570 Card address is mainframe 0, card
address 5. The Power LED is out.
Sets channel A to 0 °. No new @XY command is detected by the
system. If this command directly follows the previous example,
the 53A-570 Card in mainframe 0, with address 5 is still addressed
and processes the .A command. The Power LED is out.
570 - 6

•
•
•
@13.B.00145A Sets channel B to 0 °, and channel A to 9.522 °. The 53A-570 Card
address is mainframe 1, card address 3. The Power LED is out.
The following commands show invalid or missing characters:
@05 234A The 53A-570 Card is addressed. Because of the missing decimal
point, channel A is not changed. The Power LED is out.
@05.248T5A The 53A-570 Card is addressed. The data string contains an
invalid character (T, in this case). The character is ignored and
treated as a 0. The channel A output is changed accordingly, and
the Power LED is out.
Svnchro Output Polarity Convention
The synchro voltage outputs, S3-S1, S2-S3, and SI-S2, resulting from an output of 0 in degrees,
are found by the following equations:
S3-S1 = 11.8 sin 0 V RMS
S2-S3 = 11.8 sin (0 + 120 °) V RMS
SI-S2 = 11.8 sin (0 + 240 °) V RMS
As an example, for 0 = 246.3620 these voltages are:
SI-S3 = 10.81V RMS out of phase (with respect to RHI-RLO)
S2-S3 = 1.31V RMS in phase (with respect to RHI-Rw)
SI-S2 = 9.50V RMS in phase (with respect to RHI-Rw)
Figure 1 shows the differential reference input and the three differential synchro outputs for
this example. Note that all synchro outputs are always either in phase or 180 degrees out of
phase with respect to the reference. The ratio between the amplitudes of the three
differential outputs (not phase angle difference) determines the angular value represented by
asynchro signal.
CAUTION:See the caution on page 570-3 of this manual if you choose to measure these
outputs with an oscilloscope.

INSTALLATION
The 53A-570 Card is a function card; therefore, it may be plugged into any blue card slot.
Setting the Address Select switch defines the card's programming address. To avoid confusion,
it is recommended that the slot number and the programming address be the same.
CAUTION:
To avoid plugging the card in backwards, observe the following:
a. Match the keyed slot on the card to the key in the backplane connector. The
component side should be to the right for a 53 Series Chassis and to the top
for a 63 Series Chassis.
b. There are two ejectors on the card. Make sure the ejector marked "53A-570"
is at the toD for a 53 Series Chassis and to the left for a 63 Series Chassis.
CAUTION:
The 53A-570 Card is a piece of electronic equipment and therefore has some
susceptibility to electrostatic damage (ESD). ESD precautions must be taken whenever
the module is handled.
570 - 8

APPENDIX A
•
•
53/63 SERIES SYSTEM COMMANDS
Command Description
@XY The @XY (Address) command addresses a function card in the 53/63 Series System.
@is a delimiter used by the 53/63 Series System.
Xis a card cage address (0-9) defined by the Address Select switch on the 53A-171
Control Card in the addressed card cage.
Yis a function-card address (0-9) defined by the Address Select switch on the
function card. Once a card cage/function-card combination is addressed, it
remains addressed until the 53/63 Series System detects a new @ character.
@XH The @XH (Halt) command halts all function cards within the mainframe defined
by X. The command does not affect function cards in other mainframes. How a
function card reacts to the @XH command depends on the card. In all cases, if
addressed (Power LED Out) the 53A-570 will become unaddressed (Power LED
Lit) when a Halt command is received.
On the 53A-570 Card, the position of the Halt switch causes the "@XH" command
to have the following effect: If the Halt switch is ON, the 53A-570 Card resets to
its power-up state; if the Halt switch is OFF, the 53A-570 Card is simply
unaddressed.
STOP The STOP command is not a string of ASCII characters. This command is hard-
wired from the system controller to the 53/63 System's communications card in
each card cage. When the system controller issues a STOP command, each function
card (including the 53A-570 Card) reacts as if it had received the @XH command
described above.
How the system controller executes a STOP command depends on the
communications card used. For example, when using the 53A-128 IEEE-488
Communications Card, a STOP command is executed whenever the system
controller asserts the IEEE-488 bus line IFC (Interface Clear) true.

APPENDIX B
INPUT/OUTPUT CONNECTIONS
Pin No. Function
1Si (synchro-analog output), channel A.
2S2 (synchro-analog output), channel A.
3S3 (synchro-analog output), channel A.
4Reserved S4 (resolver) channel A.
5RHI (reference input, high), channel A.
6RLO (reference input, low), channel A.
10 Si (synchro-analog output), channel B.
11 S2 (synchro-analog output), channel B.
12 S3 (synchro-analog output), channel B.
13 Reserved S4 (resolver) channel B.
14 RHI (reference input, high), channel B.
15 RLO (reference input, low), channel B.
23, 24 +15 VDC, External Power Supply Input.
A- Z GROUND.
AA, BB -15 VDC, External Power
•
570 - 10

•
SERVICE MANUAL
53A-570
DIGITAL SYNCHRO CONVERTER
•
•Copyright 1989 Colorado Data Systems, Inc. All rights reserved.
Contents of this publication may not be reproduced in any
form without the written permission of Colorado Data Systems, Inc.

53A-570
DESIGNATOR CDS PART
NUMBER QTY: PART
DESCRIPTION
MFG,
NUM.
MFG.PARTREFERENCE
NUMBER
CO3 21018-15009 1CAP FXD ELECT 150UF 0025 NLW150-16
75% -10% 16VDCW
C04,06,14,15,85,94,95,96 20128.10006 8CAP FXD CER .1UF 20% 0058 C322C104M5U5CA
50VDCW
C07 22022.10008 1CAP FXD TA 10UF 0106 1990106X9025CA1
10.20% 20-25VDCW
C66 20128-47006 1CAP FXD CER .47UF 20% 0075 RPE123Z5U474M50V
50VDCW
C84 21528.33003 1CAP FXD MICA 330PF 0025 CD7CA331J03
5% 100VDCW
C923,924,925,926,933,934,935,936 20128-10005 8CAP FXD CER .01UF 20% 0106 1C25Z5U103M050B
50VDCW
C928,938 22022.20008 2CAP FXD TA 22UF 0106 1990226X9025CA1
10.20% 20-25VDCW
CR533,534 32000.05260 2DIODE ZENER 43V .5W 5% 0074 1N5260B
DS01 32000-00103 1DIODE LIGHT EMITTING RED 50MA 0039 550-0103
DS011,012,013,014,015,016,017 32000-02003 8DIODE LIGHT EMITTING RED WITH 0039 547-2003
018 RESISTOR 0
El 40401-00570 1EJECTOR STAMP 53A-570 0026 40401-00570
STYLE B BLUE
E2 40401-10058 1EJECTOR STAMP D-S 0026 40401-10058
STYLE D BLUE
E3 45050-03293 1DCL LED 8POS DRW 00000.00564 0026 45050-03293
E4 45050-03236 1DCL LED 8POS BLK DRW 00000 0026 45050.03236
-00473
F07,971,972 42202-52001 3FUSE SUB-MIN 2AMP 0061 251002
F501 42202-52125 1FUSE SUB-MIN 1-8AMP 0061 251.125
F901,902 10000-00002 2USER INSTALLED FUSE 0026 10000-00002
PCB 41530-57000 1P. C . BOARD VERSION 4L 0026 41530-57000
8911
Q841,842 51100.03646 2TRANSISTOR NPN HIGH SPEED 0074 MPS3646
SWITCH
R07 10117-30004 13K RES COMP 1-4W 5% 0087 R25J-3K-5%
DIGITAL SYNCHRO CONVERTER
REV 8911-06-C

53A-570
REFERENCE DESIGNATOR CDS PART
NUMBER
QTY PART
DESCRIPTION
MFG.
NUM.
MFG. PART
NUMBER
R66 10117-22003 1220 OHM RES COMP 1-4W 5% 0087 R25J-220-5%
R67,941,944,945,947 10117-10005 510K RES COMP 1-4W 5% 0087 R25J-10K-5%
R84 10117.33003 1330 OHM RES COMP 1-4W 5% 0087 R25J-330-5%
R942 10117.62005 162K RES COMP 1-4W 5% 0087 R25J-62K-5%
R943 10117-22005 1 22K RES COMP 1-4W 5% 0087 R25J-22K-5%
R946 10117-91005 191K RES COMP 1-4W 5% 0087 R25J-91K-5X
S57 42050-10101 1SWITCH DIP 1POS SPST 0093 JS-8794-01
S77 42050-10010 1SWITCH 10POS. 0101 C42315-A61-A11
UO3 79814-00022 1PAL PROGRAMMED 16R8L REV A 0026 79814-00022
53A-570 71 72 73
U04 79813-00062 1PROGRAMMED PROM U04 0026 79813-00062
53A-570
UO5,36,57,66,86 76901-07402 5IC TTL LS QUAD 2-INPUT 0107 74LS02
NOR GATE
U06,84 76500-07410 2IC TTL LS TRIPLE 7-TwIPUT 0107 74LS10
NAND GATE
U07,87 78401-07414 2IC TTL HEX SCHMITT INVERTING 0107 7414
BUFFER
U15,77,85 77815.07432 3IC TTL LS QUAD 2-INPUT OR GATE 0107 74LS32
U16,26 76510-07411 2IC TTL ALS TRIPLE 3-INPUT 0107 74ALS11
AND GATE
U17 76601-07438 1IC TTL QUAD 2-INPUT NAND 0107 7438
BUFFER W-OC
U24 79813-00063 1PROGRAMMED PROM U24 0026 79813-00063
53A-570
U25,35,45,55,65,75 73001-74175 6IC TTL LS QUAD D-TYPE 0107 74LS175
FLIP-FLOP
U27,95 73301-07404 2IC TTL LS HEX INVERTER 0107 74LSO4
U30 20100-05101 1DIGITAL TO SYNCHRO CONVERTER 0248 DSC 5101-2335
0-
U34,44,54,64 71256-74283 4IC TTL LS 4-BIT FULL ADDER 0107 74LS283
DIGITAL SYNCHRO CONVERTER
REV 8911-06-C

53A-570
REFERENCE DESIGNATOR CDS FART
NUMBER CITY PART
DESCRIPTION
MFG.
NUM.
MFG. PART
NUMBER
U37,47 73310-74244 2IC TTL LS OCTAL BUFFER 0107 74LS244N
NON-INVERTING
U46 71200-74161 1IC TTL LS SYNCH 4-BIT COUNTER 0107 74LS161A
U56 79001-07442 1IC TTL LS 4-LINE TO 10-LINE 0107 74LS42
DECODER
U67,76 77203-07408 2IC TTL ALS QUAD 2-INPUT 0107 74ALSO8
AND GATE
U74 79813-00064 1PROGRAMMED PROM U74 0026 79813-00064
53A-570
U96,97 73001-07474 2IC TTL LS DUAL D-TYPE EDGE 0107 74LS74A
TRIG FLIP-FLOP
X01,02 45010-08100 2SOCKET SIP 8 PIN 0032 CAS-08VSC-126
X04,24,74 45012-24100 3SOCKET 24-PIN DIP 0089 ICN-246-S5-G
DIGITAL SYNCHRO CONVERTER
REV 8911-06-C
•
•

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