Reno GT-200-LRT Operating Instructions

WITH DELAY AND EXTENSION TIMING

GENERAL

The Model GT-200-LRT is a two channel, scanning card rack type loop detector. This detector provides
reliable train detection for Light Rail Train detection applications by incorporating special features that prevent
lock-ups caused by high electric currents found in electrified railroads when loops are placed between the rails.
The detector automatically tunes and is operational within two seconds after application of power or a reset.
Full sensitivity and hold time require approximately 30 seconds of operation. The detector is fully self-
compensating for environmental changes and loop drift over the full temperature range. Each channel is
programmed using a front panel eight-position DIP switch. Call Delay and Call Extension timing functions are
programmed using PC board mounted DIP switches. Each channel has one dual color (green/red) LED
indicator. The LED provides an indication of the output state and loop failure conditions. Normal output
conditions are indicated when the LED is illuminated in green or orange. Loop failure conditions are indicated
when the LED is illuminated in red. A built-in test mode provides means for verifying proper operation of the
DIP switches, loop oscillator circuitry, and LED indicators.

CONTROLS AND INDICATORS

Front Panel Switches

Two eight-position DIP switches are labeled 1, for channel 1 and 2, for channel 2.
4
SENSE
2
7
LEVEL
1
6
PULS PRES
5
FAST NORM
4
1
3
FREQ
2
2
DISABLE
1
( )
Factory Default Settings Shown

Channel Disable

When the DISABLE switch is in the disable position, the channel's output is continuously in the No Call state
regardless of the presence or absence of vehicles over the loop. The loop oscillator is off when the channel is in
the disabled state.
NOTE: Changing the Channel Disable DIP switch resets the detector channel.

Loop Frequency

Each channel has four (4) selectable loop frequencies.
8
7
6
5
4
1
3
FREQ
2
2
1
High (0)
MODEL GT-200-LRT
(Firmware Version GT 2.x)
TWO CHANNEL LOOP DETECTOR
OPERATING INSTRUCTIONS
8 Sensitivity Levels: 0 to 7 (See Sensitivity Level Section)
Pulse / Presence
Fast / Normal Response
4 Frequency Selections: 0 to 3 (See Loop Frequency Section)
Disable / Operate
8
7
6
5
4
1
3
2
2
1
Medium High (1)
8
7
6
5
4
1 1
3
2 2
2
1
Medium Low (2)
8
7
6
5
4
3
2
1
Low (3)