GTT Canoga C924 Series, Installation Manual

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Canoga™ Vehicle Detectors
Canoga™ C924X Series Installation Manual
68 – Product Description & Specification
8.2.12 Communication Ports
Rear communication port: half duplex TIA-485
Front communication port: DTE (like a PC) configured, full duplex TIA-232 via 9-Pin DSUB (pins,
female shell)
Baud rates: 1200, 2400, 4800, 9600 (default), 19200, 38400 using 8 data bits, no parity bit, 1 stop bit.
8.2.13 Front Panel LED Indicators
The front panel of the C924X vehicle detector is equipped with wide-angle LEDs indicating the unit’s
current operating status and condition. All models of vehicle detectors have the following LED
indicators:
8.2.13.1 Power Indicator
The green Power LED lights when power is applied to the unit.
8.2.13.2 Channel of Detection Indicators
There are two wide-angle LED indicators for each channel of detection. The green Channel Detect
LEDs indicate vehicle detection and Delay or Extension time. The red Channel Fault LEDs provide
diagnostic codes to identify loop system faults.
See Section 7.4 Diagnostic Codes on page 63 for a list of diagnostic codes displayed when a fault
occurs.
When Extension/Delay timing is enabled, the green Channel Detect LEDs visually distinguish between
periods of Delay and Extension timing. During Delay periods, the green Channel Detect LED flashes at
4 Hz. This indicates that a vehicle has entered the detection zone, but the vehicle detector output is
temporarily inhibited. During Extension periods, the green Channel Detect LED flashes at 16 Hz. This
indicates that all vehicles have left the loop system, but the output is temporarily being held in the
Detect state.
If neither Delay nor Extension timing is enabled, the green Channel Detect LEDs light when a vehicle is
detected and remain on until the detection zone is cleared.
When you use C900-CS to change the vehicle detector channels to do directional detection, the green
Channel Detect LEDs light when vehicle presence is detected and flash at 16 Hz to indicate a call
output is activated following detection of a vehicle traveling in the direction to be detected. See the
C900-CS On-Line Help for more information on directional detection.
8.2.13.3 Serial Communication
The 924X Vehicle Detectors each contain two independent communication ports, Front and Rear. The
front panel serial communication port is TIA-232 full duplex. This port is configured as a Data
Terminal Equipment (DTE) device port. (Note: A PC is a DTE device; a modem is a DCE, Data
Communication Equipment device.). The port is accessed via a 9-pin D subminiature (DSUB) connector
(pin contacts, female shell).
See Section 3.3.1 Cable - Front Port to PC (9-Pin DSUB sockets both ends) on page 8 and Section 3.3.2
Cable – Front Port to Modem (9-Pin DSUB pins) on page 8 for connection details.
The rear communication port is TIA-485 and is available through the card rack connector. This is a
two-wire, half-duplex interface.
With the installation of an optional the 832 communication module, the rear communication port
becomes full-duplex TIA-232 (only TX, RX, DC Common available).