Installation Guide

Access Point Controller Card (APCC) 3
Sensys Networks, Inc. Installation Guide
Chapter 2
Overview
This chapter provides an overview of the APCC and its additional components.
The chapter also describes the contents of a product shipment.
Access Point Controller Card (APCC)
The Sensys Networks VDS240 Wireless Vehicle Detection System detects the
presence and movement of vehicles with magneto-resistive sensors mounted in
the pavement. Wireless sensors continuously transmit detection data to the APCC
that collects and forwards data to remote traffic management systems or local
traffic signal controllers such as the CalTrans Type 170, Type 2070 ATC and
NEMA TS-1, and TS-2 controllers.
The Sensys Networks Access Point Controller Card (APCC), is a second generation
controller card that maintains low power consumption, supports multiple radios,
and allows for additional communication and processing power. The APCC, which
is compatible with all of Sensys Networks VDS240 Wireless Vehicle Detection
System products, receives and processes data from the sensors. The APCC then
relays the sensor detection data to a roadside traffic controller or remote server
traffic management system.
Contact Closure Expansion Card
Additional capacity (to handle more sensors or controller channels) is provided by
a contact closure expansion card (EX card). EX cards use the same form factor as
APCC cards and are daisy-chained to a CC interface on the APCC on the front-
panel RJ45 jacks or backplane connectors. Up to 63 EX cards can be used per
APCC card.