Controller - Institute of Transportation Engineers

4.5.5.2
The monitor circuitry shall switch the +5 VDC Standby ON immediately upon Power
Failure and isolate (OFF) the line at Power Up.
4.5.5.3
The 60 Hz Square Wave LINESYNC signal shall be generated by a crystal oscillator,
which shall be synchronized to the 60-Hz VAC incoming power line at 120 and 300
degrees. A continuous square wave signal shall be +5 VDC amplitude, 8.333 ms halfcycle
pulse duration, and 50 ±1% duty cycle. The output shall have drive sink capability
of 16 mA. A 2 K-Ohm pull-up resistor shall be connected between the output and +5
VDC. The monitor circuit shall compensate for missing pulses and line noise during
normal operation.
4.5.5.4
The LINESYNC shall continue until SYSRESET transitions LOW and begin when
SYSRESET transitions HIGH.
4.5.6 Power Supply Requirements
Voltage Tolerances I Minimum I Maximum
+5 VDC
+4.875 to +5.125
10.0 AMP - MODULE 2070-4A
1.0 AMP
VDC
3.5 AMP – MODULE 2070-4B
+12 VDC Serial +11. 4 to +12. 6 VDC 0.1 AMP 0.5 AMP
-12 VDC Serial -11. 4 to –12. 6 VDC 0.1 AMP 0.5 AMP
+12 VDC +11. 4 to +12. 6 VDC 0.1 AMP 1.0 AMP
4.5.6.1 Line Regulation
Line Regulation shall meet the table tolerance values for voltage range of 90 to 135 VAC,
the maximum/minimum loads called out in the table and including ripple noise.
4.5.6.2 Load Regulation
Load Regulation shall meet the table tolerance values for voltage range of 90 to 135
VAC, the maximum/minimum loads called out in the table and including ripple noise.
4.5.6.3 Efficiency
70 % minimum.
4.5.6.4 Ripple & noise
Standard for the ATC – Type 2070 March 29, 2001
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