Controller - Institute of Transportation Engineers

The EIA-485 Line Drivers/Receivers shall be socket mounted and shall not draw more
than 35 mA in active state and 20 mA in inactive state. A 100-Ohm Termination Resistor
shall be provided across each Differential Line Receiver Input. The MOTHERBOARD's
control signals (e.g., SP1-RTS) shall be active, or asserted, when the positive terminal
(e.g., SP1-RTS+) is a lower voltage than its corresponding negative terminal (e.g., SP1-
RTS-). A control signal is inactive when its positive terminal voltage is higher than its
negative terminal. Receive and transmit data signals shall be read as a "1" when the
positive terminal's (e.g., SP1-TXD+) voltage is higher than its corresponding negative
terminal (e.g., SP1-TXD-). A data value is "0" when its positive terminal's (e.g., SP1-
TXD+) voltage is lower than its negative terminal (e.g., SP1-TXD-).
4.1.7 MTBF Analysis Report
Deleted
4.1.8 Sockets
Sockets for devices (called out to be socket mounted) shall be "xx" pin AUGAT 500/800
series AG10DPC or equal.
4.1.9 SDLC
SP5and SP3 SDLC frame address assignments (Command/Response) are as follows:
SP5
SP3
CPU 2070-1 = “19” “19”
FI/O 2070-2A & 8 = “20” Not Applicable
CPU Broadcast to all = “127” “255”
All other addresses are reserved by this standard. The SDLC response frame address
shall be the same address as the Command frame it receives.
4.1.10 Year 2000 Compliance
The 2070 UNIT shall comply with the Year 2000 Compliance:
"Year 2000 compliance for Systems is achieved when an application or system products
(including software, microcode and microprocessors), programs, files, databases, and
functionality have or create no logical or mathematical inconsistencies when dealing with
dates prior to and beyond 1999. The year 2000 is recognized and processed as a leap
year. The product must also operate accurately in the manner in which it was intended
for date operation without requiring manual intervention."
4.2 Type 2070-1 CPU Module
Standard for the ATC – Type 2070 March 29, 2001
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