MATERIALS ENGINEERING AND TESTING SERVICES
Materials Engineering and Testing Services
Office of Roadway Materials Testing
Electrical Testing Branch
Model 170E Controller Unit
The Model 170E Controller Unit is designed to operate traffic applications from two/eight phase intersections to computerized network systems. In addition, with the implementation of various software packages, the Model 170E can also be used for ramp metering control, changeable message sign control, sprinkler control, pump control and changeable lane control.
Easily removable low wattage power supply Four (4) programmable ACIA ports Programs can run either internal (M170E Module) or external (412C Module) Accepts up to two (2) Model 400, 1200bps, 4-wire, leased line modems Wide temperature operating range, -37° C to +73° C
CPU Module includes the MPU Quad ACIA’s with EIA-232 interface and five clock speeds from 19.2 to 307.2KHz Up to 32K of EPROM which eliminates need for external 412C Program Module 32K of battery backed, write protected RAM Decode Logic and the Bus Drivers
Power supply has holdup features to keep supply voltages within spec for a certain period of time. Super Caps supply standby power to memory devices and a Down Time Accumulator, which tracks the length of time of the power outage.
Field I/O Features
Both input and output modules are contained on single boards to facilitate easy maintenance. The modules utilize CMOS technology to increase noise immunity and lightning protection devices to suppress high-energy transients.
Jeff_Forester@dot.ca.gov ,Transportation Engineer (Electrical)
Fax (916) 227-7026