Model 2010 CONFLICT MONITOR INSTRUCTION MANUAL Rev. 3, 2/10/00 P/N # MN078110 Corporate Headquarters 9603 John Street Santa Fe Springs, CA 90670 Tel: (562) 923-9600, (800) 733-7872 Fax: (562) 923-7555
I. GENERAL DESCRIPTION The Model 2010 Conflict Signal Monitor detects malfunctions of a system 170 and 2070 controller and load switches. It monitors for the following fault conditions: 1. Low AC power supply voltage. 2. Low 24V DC power supply voltage (VDC FAIL). 3. Failure of timed controller watchdog (WDT Error). The watchdog monitor is disabled in the AC line voltage is below 98 volts (or 92 volts on some monitors). 4. Conflicting phase outputs. 5. Failure due to Program Card Ajar (PCA). 6. Switch fail for multiple indications (i.e., green/yellow) on a single channel. 7. Red fail (lack of output). 8. Short or skipped yellow fail. II. GENERAL CHARACTERISTICS 1. ELECTRICAL Power Requirements Operating line voltage... 90 to 135 VAC RMS Operating line frequency...60 (± 3) Hz Power consumption (nominal)... 9 VA AC Inputs Green and Yellow Signal inputs 60 Hz full wave: (OFF)... less than 15 VAC RMS (ON)...greater than 25 VAC RMS Both positive and negative 60 Hz half waves: (OFF)... less than 30 V peak (15 VAC RMS) (ON)...greater than 50 V peak (25 VAC RMS) Red Signal inputs 60 Hz full wave: (OFF)... less than 50 VAC RMS (ON)...greater than 70 VAC RMS Both positive and negative 60 Hz half waves: (OFF)... less than 100 V peak (50 VAC RMS) (ON)... greater than 140 V peak (70 VAC RMS) RED MONITOR enable input...greater than 70 VAC RMS DC Voltage Monitoring +24 VDC Monitor input: (OFF)... less than +18 VDC (ON)... greater than +22 VDC Maximum +24 VDC power consumption...20 ma External reset input: (LO)... less than +4 VDC (HI)... greater than +12 VDC or open circuit W.D. Monitor input: (LO)... less than +4 VDC (HI)... greater than +12 VDC or open circuit Outputs Relay contacts...3 Amperes @ 120 VAC Stop time (sink)... 50 ma @ 30 VDC U.S. Traffic Corporation Page 3
Timing Functions Conflict timings: no fault... less than 200 ms fault... greater than 500 ms Watchdog monitor: fault...greater than 1.1 S between signal changes Red Fail: no fault... less than 1200 ms fault... greater than 1500 ms Yellow Timing: no fault... less than 700 ms fault... greater than 1 second 2. PHYSICAL Dimensions Height... 9.30 (23.62 cm) Width... 1.38 (3.51 cm) Depth... 10.17 (25.83 cm) Connectors The monitor circuit card mates with a 28/56 pin double sided printed circuit card having 0.156 inch centers. 2010 has an additional connector on the front panel for red enable and red channel AC inputs. 3. ENVIRONMENTAL Storage Temperature Range... -55 C to +90 C Operating Temperature Range... -34 C to +74 C Humidity Range... 0 to 95% relative depending on temperature 4. 2010 FRONT PANEL DESCRIPTION LEDs AC POWER Illuminates if power is above 103 VAC ± 2 VAC. Will flash if the monitor drops below the 98 VAC ± 2 VAC, but has not yet dropped enough to end the monitoring functions. Will extinguish if power is removed. VDC FAILED CONFLICT WDT ERROR PC AJAR SWITCH FAIL RED FAIL YELLOW PF Illuminates if the 24 volt input is below minimum level. Illuminates if a conflicting signal condition has been detected. Illuminates if a watchdog error has been detected. Flashes if monitor is in brown out mode. Illuminates if the Program Card is ajar (i.e., not seated properly). Illuminates if 2010 detects a multiple output failure (2 or 3 inputs/channel). Illuminates with switch fail LED to indicate a lack of output failure. Illuminates if 2010 detects a short or skipped yellow failure. Processor Fail, illuminates when microprocessor fails to update internal watchdog circuit for any reason, indicating program malfunction. CHANNEL LEDs Illuminates to show which channels are in the active state (i.e., green or (1-16) yellow). During fault, the channel LEDs may be used to show status at the time of fault, or in PLUS monitors, to show the channels involved in a RED FAIL, MULT IND, or YELLOW FAIL condition. U.S. Traffic Corporation Page 4
SWITCHES RESET AC RESET SP540 & SP440 Position 1 thru 16 SP340 Position 1 Position 2 Position 3 Position 4 Position 5 Position 6 Position 7 Position 8 Used to reset the monitor after detection of fault condition. In the event of a current overload within the monitor circuitry, the AC breaker will disconnect AC power. The breaker may be reset by depressing the button. Enables individual channels for Lack of Output and Multiple Output monitoring. Special function 1 polarity Off = Active high. On = Active low. Not used. Enables 2.7 second short yellow and skipped yellow monitoring. Adds.5 seconds to 2.7 seconds short yellow time. Adds 1 second to 2.7 seconds short yellow time. Adds 2 seconds to short yellow time. Adds 4 seconds to short yellow time. Adds 8 seconds to short yellow time. CONNECTOR RED INPUT AC input connector for red channels and red enable signal. U.S. Traffic Corporation Page 5
Monitor Front Panel U.S. Traffic Corporation Page 6
III. INSTALLATION The Model 2010 Conflict Monitor is a plug-in module for the Type 170 Output File. To install the Model 2010 Conflict Monitor, just insert the monitor into 170 cabinet slot reserved for it. The pin assignments of the standard edge connector are listed in the table below. All signals are inputs unless otherwise designated as outputs. Card Edge Connector PIN FUNCTION PIN FUNCTION 1 Channel 2 Green A Channel 2 Yellow 2 Channel 13 Green B Channel 6 Green 3 Channel 6 Yellow C Channel 15 Green 4 Channel 4 Green D Channel 4 Yellow 5 Channel 14 Green E Channel 8 Green 6 Channel 8 Yellow F Channel 16 Green 7 Channel 5 Green H Channel 5 Yellow 8 Channel 13 Yellow J Channel 1 Green 9 Channel 1 Yellow K Channel 15 Yellow 10 Channel 7 Green L Channel 7 Yellow 11 Channel 14 Yellow M Channel 3 Green 12 Channel 3 Yellow N Channel 16 Yellow 13 Channel 9 Green P Not Assigned 14 Not Assigned R Channel 10 Green 15 Channel 11 Yellow S Channel 11 Green 16 Channel 9 Yellow T Not Assigned 17 Not Assigned U Channel 10 Yellow 18 Channel 12 Yellow V Channel 12 Green 19 Not Assigned W Not Assigned 20 Chassis Ground X Not Assigned 21 AC-Ground Y DC Ground 22 Watchdog Timer Z External Reset 23 +24V DC A A +24V DC 24 Tied to Pin 25 B B Stop Time (Output) 25 Tied to Pin 24 CC Not Assigned 26 Not Assigned DD Not Assigned 27 Not Assigned E E Output SW, Side #2 28 Output SW, Side #1 F F AC+ The mating connector is keyed between pins 17 and 18, and between U and V. P20 Connector Pin Assignments (Red Connector) PIN FUNCTION PIN FUNCTION 1 Channel 15 Red 11 Channel 9 Red 2 Channel 16 Red 12 Channel 8 Red 3 Channel 14 Red 13 Channel 7 Red 4 Chassis Ground 14 Channel 6 Red 5 Channel 13 Red 15 Channel 5 Red 6 Special Function 2 16 Channel 4 Red 7 Channel 12 Red 17 Channel 3 Red 8 Railroad Preemption 18 Channel 2 Red 9 Channel 10 Red 19 Channel 1 Red 10 Channel 11 Red 20 Red Enable New monitors are supplied with program cards that have no permissives and no yellow inhibits. Further installation may be required to enable permissives or disable yellow inputs through the program card. IV. ADJUSTMENTS The Model 2010 monitors are calibrated at the time of manufacture. No field adjustments are required. U.S. Traffic Corporation Page 7
V. THEORY OF OPERATION 1. SYSTEMS DESCRIPTION As shown in the following block diagram, the AC and DC signals are selected by a multiplexer and compared with a threshold voltage, Different threshold voltages are selected for AC+, green/yellow signals, red signals, and DC signals. The processor uses the 60 Hz signal to time the appropriate interval to compare the signals. If no fault occurs, the processor keeps the hardware watchdog circuit strobed, which maintains the fault relay in the non-fault state. If a fault occurs or the processor fails to strobe the watchdog circuit, the monitor closes the fault relay. The stop time signal is also generated on faults. Data shifted into the shift register is used to illuminate the front panel LEDs. The channel LED information is also applied to the program card. The output of the program card is shifted into the microprocessor to determine conflict status. The inverted 60 Hz signals is used with the yellow disable to determine which yellow channels to disable. A separate, internal watchdog circuit in the 2010 will cause the PF to illuminate, if for some reason the microprocessor fails to reset this circuit. Such is the case when the AC+ falls so low that the monitor s power supply cannot deliver sufficient DC to the microprocessor. This will create a non-latched, powerfail type fault condition which is reset when power is restored. U.S. Traffic Corporation Page 8
2. DETAILED DESCRIPTION OF CIRCUIT OPERATION The Model 2010 monitor samples the channel inputs during the positive and negative peaks of the AC sine wave. A zero crossing detector generates falling edges on the negative slope of the AC line for input to the microprocessor Interrupt 0. The interrupt starts a timer in the microprocessor which then marks the start of the sampling window. AC inputs are divided down to approximately 2.5 volts peak. Inputs are multiplexed one at a time through 4051 analog switches (U580, U581, U680, U780, U781), to a comparator (U992). The comparator compares the input voltage to a threshold. The output of the comparator (Status) is input into the microprocessor. Thresholds are generated by a resistor divider network. A precision 2.5 volt signal is the reference for the resistor network. A section of U991 provides negative voltage to the network. The appropriate threshold is output to the comparator by a 4051 analog switch (U980). The microprocessor selects a positive or a negative threshold voltage, depending on whether it is sampling a positive or negative half of the sine wave. There are threshold voltages for 98, 93, 60, and 20 volt RMS inputs. Half-wave conditions are detected with the HALF comparator. The HALF signal uses a threshold voltage which is 1.4 times the STATUS threshold. This second threshold is generated by U991. The microprocessor uses the HALF input and previous half cycle status to determine if a half-wave condition exists. Latch U960 selects between the 4051 multiplexers. U970 sets the addresses for the input and threshold muxies, and controls the latching relay. U971 decodes addresses for U960 and U970, and outputs a re-trigger pulse to the re-triggerable monostable which controls the fault output relay. U270 provides level detection for DC input signals. Its outputs are opto-isolated and input to the microprocessor. The microprocessor times fault conditions by counting cycles of the AC line frequency. Re-triggerable monostable U470 must receive a pulse from the microprocessor each half cycle, or the fault output relay will put the intersection in flash. This is a watchdog feature that prevents an unsafe intersection if the microprocessor becomes lost. Channel and fault status is displayed on the LEDs through shift registers U921, U721, and U521. Channel status from these shift registers is routed to the program card. The diodes on the program card determine if a channel is in conflict with another channel. Outputs from the program are read by the microprocessor through shift registers U850, U650, and U451. Watchdog disable and program card ajar signals are also provided through the same shift registers. For 2010 monitors, the PLUS enable DIP switches are read from three additional shift registers, U350, U450, and U550. Whenever a fault occurs, the channel status and fault information is stored in the EEPROM so that data will be preserved through power outages. Latch U960 selects between the 4051 multiplexers. U970 sets the addresses for the input and threshold muxes and outputs a re-trigger pulse to the internal watchdog half of the monostable multivibrator (U470). U971 decodes addresses for U960 and U970, and outputs a re-trigger pulse to the half of the Re-triggerable monostable (U470) which controls the fault output relay. U.S. Traffic Corporation Page 9
Plus Functions The 2010 Series of the 170 monitor incorporates the IDC Solid State Devices patented PLUS functions in addition to the standard monitor capabilities. Plus functions detect switch fail conditions, i.e. multiple indications and lack of output on a single channel (green-yellow, green-red, yellow-red). The plus functions detect a wider range of possible controller and load switches malfunctions than provided by standard 170 specifications. Plus functions enforce rules for incorrect signal displays as established by the M.U.T.C.D. Plus features are selectable on a per-channel basis by DIP switches located under the program card. When the plus functions are enabled, the inputs from that channel are restricted to certain combinations of red, yellow, and green (see figure 1). Plus functions are active only when red enable is asserted. Figure 1 Green Yellow Red Fault Signal Signal Signal Type Input Input Input Display 0 0 0 RED FAIL 1 0 0 NORMAL 0 1 0 NORMAL 1 1 0 MULT IND 0 0 1 NORMAL 1 0 1 MULT IND 0 1 1 MULT IND 1 1 1 MULT IND Short and Skipped Yellow Detection When selected via DIP switch labeled ENABLE, and if the monitor s RED ENABLE input is asserted, the monitor will watch each channel that has the PLUS DIP SWITCH enabled for transitions from green to yellow to red. If a transition from green on to green off is not followed by a yellow signal, a skipped yellow failure will be detected. Similarly, if a green signal turns off, but is followed by a yellow indication that is too short, a short yellow failure will be detected. The default for the minimum length of a yellow signal is 2.7 seconds, but through DIP SWITCH option, the time can be added to in 0.5 second increments, up to a total of 18.2 seconds. VI. MAINTENANCE 1. PREVENTATIVE MAINTENANCE Your 2010 monitor is built for long-term error-free operation. No preventative maintenance is required. 2. TROUBLE ANALYSIS 2010 monitors provide two diagnostic modes and a power-up self-test. A. Status Test When the monitor is in a fault condition, remove the program card. 1) Press the reset switch. The POWER LED flashes and the channel LEDs display GREEN inputs from the time of fault. Press the reset switch for next test. 2) The FDC FAIL LED flashes and the channel LEDs display the YELLOW inputs from the time of fault. Press the reset switch for the next test. 3) The CONFLICT LED flashes and the channel LEDs display the RED inputs from the time of fault. Press the reset switch for next test. 4) The LED test will repeatedly step the LEDs sequentially. To return to test 1, press the reset switch. To exit any subtest, replace the program card and press the reset switch. U.S. Traffic Corporation Page 10
B. Internal Diagnostic Mode When the monitor is in fault and watchdog enable is one, short test points TP920 and TP921. 1) Program card test. If all program card diodes are installed, the POWER LED will be on. Otherwise, the POWER LED will flash. Press reset to enter next test. 2) DIP switch test. During this test the DC LED will flash, and the channels LEDs will display the plus enable LEDs. The conflict LED will light if yellow timing is enabled. Similarly, WDT Error, PC Ajar, Switch Fail, Red Fail, and Yellow LEDs will light to display the yellow timing DIP switches. 3) Input multiplexer test. Each AC input is selected one at a time by repeatedly pressing the reset key. As each combination of input mux, input channel, and voltage threshold is selected, the LEDs show the test status as follows: CONFLICT LED = AC line mux and 103 volt threshold VDC & CONFLICT LED = AC line and 98 volt threshold WDT LED = Green inputs are being addressed VDC and WDT LED = Yellow inputs are being addressed CONFLICT & WDT = Red inputs are being addressed UNIT POWER LED = A negative threshold is being addressed To exit this mode, disable watchdog and press the reset switch. C. Power-Up Self Test At power up, 2010 monitors check its memory components. If an EPROM error is detected, the monitor will flash the first two LEDs repeatedly. If a RAM read/write error is detected, the monitor will flash its first three LEDs repeatedly. U.S. Traffic Corporation Page 11
3. TROUBLESHOOTING CHART 2010 TROUBLESHOOTING CHART CHECK AC POWER INPUT UNIT FAILS TO POWER UP CHECK ZEROCROSS SEE WAVEFORM FIG. #3 AT PIN #12-U930 CHECK +5VDC, -5VDC +5VDC AT PIN #3 - VR150-5VDC AT PIN #2 - VR151 UNIT IGNORES 24 VOLT FAILURES WATCHDOG FAILURES RESET CHECK 24VDC CHECK 6.2VDC CHECK DATA IN SIGNAL JUNCTION OF R264 & R265 CATHODE VR260 SEE WAVEFORM FIG #6 - PIN #3 U930 CHECK INPUT CIRCUITRY CHECK MUX 0 SIGNAL SEE WAVEFORM FIG #2 AT PIN #3 U780 UNIT IGNORES CHANNEL FAILURES CHECK FULL STATUS SIGNAL CHECK HALF STATUS SIGNAL SEE WAVEFORM FIG #1 AT PIN #6 U780 SEE WAVEFORM FIG #4 AT PIN #7 U780 CHECK 2.5VDC TP885 CHECK -1.25VDC TP884 UNIT DOESN T DISPLAY CORRECT STATUS CHECK DATA OUT SIGNAL CHECK DISPLAY CIRCUITRY SEE WAVEFORM FIG #5 AT PIN #1 U780 U.S. Traffic Corporation Page 12
4. WAVEFORMS U.S. Traffic Corporation Page 13
5. VOLTAGE MEASUREMENT TP885 2.5 VDC TP884-1.25 VDC 6. ALIGNMENT PROCEDURES Alignment procedure for 93VAC dropout: For this procedure you will need an RMS voltmeter and a variable AC power supply, both connected to the monitor s AC LINE input. 1) Turn red enable off. 2) Adjust R995 fully counter-clockwise. 3) Adjust input voltage to 93 VAC. U.S. Traffic Corporation Page 14
3. TROUBLESHOOTING CHART PART DESIGNATION USTC PART NUMBER PART DESCRIPTION (MANUFACTURER P/N) (MANUFACTURER) U971 001630 74HC139-C (74HC139) (HARRIS) J860 CNR0430 210 INTERFACE (006000400) (SOLID STATE) U950 102748 27C64-EPROM (TM27C64J) (TI) U451, U650, U850 ICS8040 4021-IC (CD4021BE) (RCA) U470 000194 14537-IC (MC14538) (MOTOROLA) U520, U720, U820, U920 ICS8060 4049-IC (CD4049BE) (RCA) U580, U581, U680, U780 ICS8290 4051-IC U781, U980 (CD4051BE) (RCA) U521, U721, U921 ICS8050 4094-IC (CD4094BE) (RCA) OC3652, OC358, OC360, ICS8110 4N35-IC OC370 (4N35) (MOTOROLA) U940 001634 4HC373-IC (MM74HC373N) (NATIONAL) U960, U970 001635 74HC374-IC (CD74HC3744E) (RCA) U930 ICS8030 8031-IC (5C80C31BCCN40) (SIGNETICS) C480, C481, C482, C483, 000925 CAP.01uF-50V C484, C486, C580, C581, (NCD.001M50VMZ5) (NICHICON) C582, C583, C584, C585, C680, C681, C682, C683, C684, C685, C686, C687, C688, C689, C780, C781, C782, C783, C784, C785, C786, C787, C788, C789 C790, C796 CAP0135 CAP.01uF-63V (IR67103J) (THOMPSON) C150, C155, C250, C460, CAP0320 CAP 0.1uF-63V C470, C630, C650, C820, (104J050RA2) (PAKTRON) C860, C990, C991, C997, C999 U.S. Traffic Corporation Page 15
PART DESIGNATION USTC PART NUMBER PART DESCRIPTION (MANUFACTURER P/N) (MANUFACTURER) C830 CAP0422 CAP 10uF-50V (NREI0M50V) (NICHICON) C730, C731 C0058 CAP 33pF-10V (DD330) (CRL) C160 071973 CAP 10,000uF-25V (ECEBICV3325) (PANASONIC) C140 071927 CAP 47uF-50V (PANASONIC) CB110 FSE0120 BREAKER 1 AMP (4104PR) (ETA) Y830 XTL0070 12MHZ CRYSTAL (MM18N120) (MONITOR PRODUCT) D170, D171, D180, D181 DI00005 1N4007 DIODE (1N4007) (DIODE INC) D270, D370 000257 1N4848 DIODE (1N4148) (DIODE INC) D267 000816 IN4004 (1N4004) (DIODE INC) VR893, V4896, VR899 DI000030 1N5231B, ZENER (1N5231B) (DIODE INC) K490 RLY0060 HA1-DC RELAY (HAIDC5V) (AROMAT) LD910 DSP0049 LED (GREEN) (LTL4236) (LITE-ON) LD510, LD511, LD610, DSP0055 LED LD611, LD612, LD613, (LTL4296) (LITE-ON) LD614, LD710, LD711, LD712, LD713, LD714, LD810, LD811, LD812, LD813, LD814, LTL4256L, LD912, LD913, LD914 U270, U635 001640 LM324A-IC (LM324AN) (SGS) U992 ICS8090 LM339A-IC (LM339AN) (SGS) VR150 000239 LM7805C (MC7805CT) (MOTOROLA) U.S. Traffic Corporation Page 16
PART DESIGNATION USTC PART NUMBER PART DESCRIPTION (MANUFACTURER P/N) (MANUFACTURER) VR151 VRG0070 LM79L05ACZ (79L05ACP) (MOTOROLA) MV395 071831 MOV, 150L10 (V150LA10A) (GE) U730 IC0331 NMC9306-IC (NMC9306N) (NATIONAL) Q250, Q380 000134 2N4401 NPN (2N4401) (GE) Q990 000135 SN4403 PNP (2N4403) (MOTOROLA) R995 POT0031 5K POT (67YR5K) (BECKMAN) SW410 SWH0121 P/B SPST (P75120100PB) (SWITCHCRAFT) R889 071001 RES., 0 OHM (CBJ00000RA) R880 RES2012 RES., 1.13K, 1% (MBFJ0113KA) R732, R894 RES2090 RES., 10.7K, 1% (MBF01070KA) R274 071018 RES., 100K (CBJ10000KA) R888, R890 RES2140 RES., 105K, 1% (MBFJ1050KA) R361, R362 000046 RES., 10K (CBF01000KA) R268 RES2083 RES., 10.2K, 1% (MBF01020KA) R792 RES1008 RES., 10M (CBF0010MA) R733, R992 RES2103 RES., 13K, 1% (MBF01300KA) R886 RES2142 RES., 154K, 1% (MBF15400KA) R796 RES2146 RES., 187K, 1% (MBF18700KA) U.S. Traffic Corporation Page 17
PART DESIGNATION USTC PART NUMBER PART DESCRIPTION (MANUFACTURER P/N) (MANUFACTURER) R272, R275, R480, R830, 071003 RES., 1K R885 (CBF00001KA) R990 071057 RES., 2.4K (MBF00240KA) R731 001608 RES., 200K (CBF20000KA) R482, R370 RES., 220K, 5% RP590, RP591, RP690 0171051 RPACK 220K RP790, RP791 (MD1603224G) (DALE) R264 RES2109 RES., 22.1K, 1% (MBFJ02210KA) R998 RES2110 RES., 25.5K, 1% (MBFJ02550KA) R791, R892 RES2170 RES., 261K, 1% (MBFJ2610KA) RP580, RP680, RP780, RES1048 RPACK 3.3K RP880 (CSC10A01332G) (DALE) R887 RES2020 RES., 3.65K, 1% (MBF03650KA) R999 RES2115 RES., 30.1K, 1% R510, R511, R610, R611, 071015 RES., 330 R612, R613, R614, R710, R711, R712, R713, R714, R810, R811, R812, R813, R814, R910, R911, R912, R913, R914 R891 RES2130 RES., 43.2K, 1% (MBF04320KA) R275 071020 RES., 47K R267, R270, R273, R277, 001610 RES., 5.1K R790, R897, R898 (CBF000510KA) R895 RES2040 RES., 5.36K, 1% (MBF00536KA) R265 071040 RES., 6.8K (CBF000680KA) U.S. Traffic Corporation Page 18
PART DESIGNATION USTC PART NUMBER PART DESCRIPTION (MANUFACTURER P/N) (MANUFACTURER) R794 000110 RES., 680K (MBF0680KA) R883 RES2055 RES., 7.50K, 1% (MBF000750KA) R993 071041 RES., 7.5K (CBF000750KA) R881 RES2060 RES., 7.68K, 1% (MBF000768KA) R882, R884 RES2065 RES., 8.66K, 1% (MBF00866KA) R271 001611 RES., 820 (CBF000820RA) R991 RES2083 RES., 9.53K, 1% (MBF00953KA) RP460, RP660, RP860 RES1057 RPACK 100K (CSC09401104G) (DALE) T290 XFM0057 TRANSFORMER (FP16750) (TRIAD) VR990 000859 LT1009M (LT1009MH) (LINEAR TECH) U991 TCS8070 TL084 (TL084CN) (TI) VR260 DI00032 ZENER, 1N5234 (1N5234) (DIODE INC) (MP015628DS1E9) EDGE CARD (MONITOR PRODUCT) 000700 POLARIZING KEY (04-0001-000 (ACACIA) (N5H255BSR1T) HEADER, RT ANGLE (ROBINSON-NUGENT) 000851 28 PIN SOCKET (IC028658AT) (ROBINSON-NUGENT) 000852 40 PIN SOCKET (IC040658AT) (ROBINSON-NUGENT) HTS0050 (5741B) HEATSINK (AVID) U.S. Traffic Corporation Page 19
PART DESIGNATION USTC PART NUMBER PART DESCRIPTION (MANUFACTURER P/N) (MANUFACTURER) HWR0250 (2040B) (CP66) CGD0020 (DC450) CHASSIS FASTENER (H.H. SMITH) CARD EJECT (BIVAR) CARD GUIDE (BIVAR) 104265 MAIN BOARD (006000106) (SOLID STATE) PC-170 PROGRAM CARD (006000500) (SOLID STATE) 104038 FRONT PANEL (670000400) (SOLID STATE) CNR0430 HEADER, 5 PIN (320000300) (SOLID STATE) DET065 RT CARD GUIDE BRKT (670-001-00) (SOLID STATE) DET064 LFT CARD GUIDE BRKT (670-002-00) (SOLID STATE) AD4, AD6 CAP0300 CAP.1uF-50V (8121M0500104MZ) (SYFER) AD1 CAP0356 CAP.1uF-400V (ECQE4104KZ) (PANASONIC) AD6 CAP0301 CAP.1uF-50V (C320C104K5R5CA) (KEMET) *All resisters are 1/4 Watt, 5%, unless otherwise specified. U.S. Traffic Corporation Page 20