Reno A&E H2 Operating Instructions

IV Failed Loop Diagnostics
The Fail LED (red) provides loop failure information. The Fail LED is "OFF"
when the loop inductance value is within tolerance, and no past out of tolerance
conditions have existed. The Fail LED flashes at a one Hertz rate (50% duty
cycle) when the current loop inductance value is out of tolerance. The Fail LED
flashes at a rate of one flash every five seconds when a past out of tolerance loop
condition has existed, but the current loop inductance value is within tolerance.
This flash rate continues as long as the loop inductance value remains in
tolerance. Resetting the detector clears the fail indication. A flashing Fail
LED indication suggests the possibility of an intermittent loop connection.
Reno A&E highly recommends soldering all loop connections with a proper
soldering iron and rosin core solder.
V

Pin Connections

Pin Function
1 Loop
2 Loop
3 Reset
4 No Connection
5 No Connection
6 Fail Output Drain
7 Fail Output Drain
8 Detect Output Drain
9 DC +
10 DC Common
NOTES: Pins 6 and 7 (Fail Outputs) are in a conducting state when power is applied and
a functioning loop is connected to the detector. If power or the loop fails, the
Fail Output will open to provide an indication of the failure.
The Detect and Fail Outputs are FET devices that sink current to DC Common
(i.e. the FET Output switches the load to DC Common). To operate properly,
the output must be connected as shown below:
Detector
DC Common
If the output is being used to turn on an inductive device such as a relay, a
snubber diode should be wired in parallel with the relay coil.
Model H2 Op Instr 2008 03 18
+ VDC
Load
Optional Diode
Detect or Fail Output
4
SINGLE CHANNEL LOOP DETECTOR
I

General

The Model H2 is a single channel detector with a solid state Detect Output and a
solid state Fail Output. Please verify source voltage before applying power.
The Model H2 will operate on voltages between 8 and 30 VDC with a maximum
current requirement of 45 mA.
II

Indicators and Controls

i

Power / Detect / Fail LEDs

The detector has one green and two red LED indicators used to provide
indications of the detector's power status, output state, and/or loop failure
conditions. The table below lists the various indications and their meanings.
Status POWER LED (Green) DETECT LED (Red)
Off
On
Flash
ii

Rotary Switch (Sensitivity)

The eight-position rotary switch selects one of eight (8) sensitivity levels as
shown in the table below. 0 is lowest and 7 is highest, with normal (factory
default) being 4. Use the lowest sensitivity setting that consistently detects the
smallest vehicles. Using higher than necessary sensitivity levels may result in
false detections.
Position
-ΔL/L
* Factory default setting.
P/N 551-0805-00
Reno A&E
4655 Aircenter Circle
Reno, NV 89502-5948 USA
Telephone: (775) 826-2020
Fax: (775) 826-9191
Website: www.renoae.com
E-mail: contact@renoae.com
MODEL H2
OPERATING INSTRUCTIONS
No power Detect Output Off
Power to detector Detect Output On
2 Hz (50% duty cycle)
Delay timing
N/A
4 Hz (50% duty cycle)
Extension timing
0 1 2 3
2.56% 1.28% 0.64% 0.32% 0.16% * 0.08% 0.04% 0.02%
FAIL LED (Red)
Loop OK
N/A
1 Hz (50% duty cycle)
Loop Failure
One flash every five seconds
Prior Loop Failure
4 * 5 6 7