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Diablo controls have been making OEM detectors for the automation industry for decades. Client companies can take advantage of 40 years of experience in this specialist field with a Diablo product with their branding.
One stye is the plug in card that fits onto a standard 10 way "Molex" header found on scores of gate automation boards. Replacing relays with solid state outputs keeps down costs, current consumption and form factor.
Though card modules are designed to plug onto a client's board, an interface board allows card modules to be used on any automation system.
Diablo cards are made with an industry standard terminal order.
Card loop modules
Card module range
Module
Function
Features
VD940
Basic loop detector
Plug-in loop detector card with four sensitivity settings, solid state sense output, and two solid state fault detect outputs.
VD955
Adjustable loop detector
Single channel loop detector card with ten sensitivity settings, 4 frequency settings. Channel A is a N/O solid state sense output. Channel B has inverse and true outputs that can be programmed as presence or fault.
DSP19
Detector for Liftmaster openers
Single channel loop detector card with ten sensitivity settings, 4 frequency settings. Channel A is a N/O solid state sense output. Channel B has inverse and true outputs that can be programmed as presence or fault.
AVI40
Vehicle ID decoder
Transponder interface. Channel A is the valid transponder output. A learn button pressed learns the area code. Up to 4 codes per detector.
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DSP13
Magnetometer
There are two modes. Channel A and channel B give pulse and presence output. There are 10 sensitivity settings. The reset button uploads settings and sets zero.
The AVI System has many applications such as emergency vehicle access, mass transit, shuttle buses, fork lift trucking, airfield access, in fact any where vehicle access is restricted on private or industrial sites for reasons of safety or secuirty.
Consists of an AVI transponder with a unique code that is mounted to the underside of each authorised vehicle. Ttransponders are potted in a thermal epoxy compound and wired to the vehicle power.
The receiver receives the ID coded from the loop. If the code is on the white list, an output is generated and the module shows a red light indicating a valid code. This valid signal may then initiate opening the gate, or performing another security function.
The AVI receiver needs to learn each transponder ID. The vehicle is positioned over the loop and the 'learn' button pressed. Codes can be documented at the factory to prevent duplication. AVI systems have multiple Code capability.
Installation with VDCI
The VDCI board has a full wave rectfier. it functions equally from 12V battery systems to 30V ac outputs from gate control panels.The road loop or sensor connects to two terminals on the end of the board.
The solid state relay output is designed to connect directly to an automation control panel, limited to 100mA max. There is a switch to select between the N/O Activation applications or N/C safety circuits. Not all modules have both outputs.
Wiring colour are a suggestion, but commonly used in automation circles.
Loop diagnostics
The red detect LED is ON when a vehicle is over the loop detection area. It only flashes briefly on VD909, but will remain on for VD906 and VD907
Green Power LED flashes once per second indicating the detector is powered and operating. The green LED is also for loop diagnostics. If the loop becomes disconnected the green LED flashes at 2 times per second. This LED will flash 10 times per second is the loop is shorted.
Most problems are loop faults. Inspect the ground around the loop for surface break up. To check for open circuit loops, un-plug the connector, then check resistance with a digital test meter. Resistance should be less than 100 ohms.
A temorary loop can be made with 15m of single core cable laid on top of the road surface. It will be sensitive to small movements but stable enough to test the detector module. If this solves the problem you may need to replace the loop.
Loop installation is a well established road technique. We have published articles on this website. There are links below.
