Controller - Institute of Transportation Engineers

fully modular by function. Key features and modules of the controller unit are as
follows.
2.3 Controller Housing
The Type 2070 controller defines a controller housing that is intended to fit an EIA 19”
rack mounted form commonly found in the Type 332 family of cabinets. A NEMA base
module is defined for those NEMA TS1 and TS2 shelf mounted applications.
2.4 Power Supply
A power supply module is used to convert 120-volt power to voltages required to operate
the electronics inside the Type 2070 controller unit. This power supply must meet certain
minimum electrical characteristics defined herein for its intended use.
This, however, does not preclude a manufacturer or an AGENCY from requiring a
specific power supply form factor so that it is consistent across a wide range of packages
that may be employed by that AGENCY.
2.5 Front Panel
The Controller Front Panel contains a keyboard and display that comprise the user field
interface. The Front Panel on the Type 2070 controller is optional. Communications to
the controller processor may be over one of the serial ports.
The front panel might also be used as a portable input device rather than or in addition to
a notebook PC. This will offer a low cost alternative and will provide a minimum
functionality for those agencies that have trouble purchasing and supporting notebook
PCs.
3 GENERAL ATC REQUIREMENTS
3.1 General
In CASE of CONFLICT, the individual chapter shall govern over this chapter.
All furnished equipment shall be new and unused. Vacuum or gaseous tubes and electromechanical
devices (unless specifically called out) shall not be used.
3.1.1 Interchangeability
Assemblies and their associated devices shall be electrically and mechanically
interchangeable at both the assembly and device levels:
ASSEMBLIES
ASSOCIATED DEVICES
Standard for the ATC – Type 2070 March 29, 2001
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