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EMX VMD AC/DC
Engineered for ease of use, the VMD AC/DC provides a solution for many vehicle detection challenges. Where safety is an issue, the VMD detects moving vehicles in an industrial environment where there are blind areas along the driving path and actuates warning lights.
Where security is an issue, the VMD detects approaching vehicles or an unauthorized movement of a parked vehicle and actuates alarms, video cameras or annunciator.
For access control applications requiring free exit, the VMD detects vehicles for gates, overhead doors and parking barriers.
FEATURES:
• Sensing probe is buried in the ground so that it is not noticed by a potential intruder or vandals.
• Is housed in a small 3.0” x 0.9” x 2.75” housing so it is easy to integrate with security control boards or gate and door operators.
• Has all the controls mounted on the front panel of the unit providing for easy access and operation.
• Low 4 mA standby current draw
• May be used with the EMX ULTRA II-MB or with the included LD-7P terminal block
• Surge protection
BENEFITS:
• Energy conservation
• Easy integration
• Easy upgrade or switch out to new devices
Where security is an issue, the VMD detects approaching vehicles or an unauthorized movement of a parked vehicle and actuates alarms, video cameras or annunciator.
For access control applications requiring free exit, the VMD detects vehicles for gates, overhead doors and parking barriers.
FEATURES:
• Sensing probe is buried in the ground so that it is not noticed by a potential intruder or vandals.
• Is housed in a small 3.0” x 0.9” x 2.75” housing so it is easy to integrate with security control boards or gate and door operators.
• Has all the controls mounted on the front panel of the unit providing for easy access and operation.
• Low 4 mA standby current draw
• May be used with the EMX ULTRA II-MB or with the included LD-7P terminal block
• Surge protection
BENEFITS:
• Energy conservation
• Easy integration
• Easy upgrade or switch out to new devices
| Power | 9-24VDC or 24VAC (do not exceed 35Vpeak) |
| Current Draw | 4 mA Standby / 50 mA Detect |
| Operating Temperature | -40°F - 180°F (-40°C - 82°C); 0 - 95% Relative Humidity |
| Output | Form "C" Relay 1A@24VDC, 1A@120VAC |
| Housing Material | VMD Housing - ABS (plastic), Probe Housing - PVC Watertight |
| Connection | 7-Position Terminal Block or 12-Pin Wiring Harness |
| Surge Protection | Surge Suppression on Probe Input Circuitry |
| Indicators (LED) | Power- Green LED, Detect - Red LED |
| Sensitivity | 15 ft. Diameter around Probe (7.5 ft. radius) |
| Dimensions | VMD - 3.0"L x 0.9"W x 2.75" H (76mm x 22mm x 70mm), Probe 17"L x 1"Diameter ( 432mm x 25mm) |
Loop Detectors and Loops
Loop Detectors are a device that is connected to a wire loop burred in the center of your driveway. A set of contacts and closes a circuit when a vehicle passes. The detector itself is a small box and has a universal connector (11 pin connector) or operator specific connector (custom connector). Both types of units do the same job. The universal type can be substituted for dedicated units. The dedicated units are convenient because they plug directly into the specific operator they are designed for, thus saving installation time. The detector acts similar to a metal detector in how it functions.
Loops are one of the most common sources of problems in automatic gate systems. Because the wire loops are buried beneath the roadway and are subject to adverse conditions and should be installed carefully. Always use recommended loop wire or loop assembles (pre-formed loops). Make sure connections and splices are in accessible boxes, preferable above grade. It is always a good idea to solder the connections.
Most loop detectors have sensitivity adjustments to accommodate larger high height vehicles. They also have a frequency adjustment. This is used primarily when using more than one detector to prevent RF (radio frequency) interference between the units. Always set the frequency differently when using more than one detector.
The detectors are commonly used to open the gate for exiting vehicles (exit loop) and to prevent the gate from closing on vehicles in its path (safety loops). Sometimes they are used to open a gate from outside as well (entrance loop). An installation may have two-way traffic with a desire to keep the gate closed as much as possible, such as keeping farm animals in. Another common scenario for an entrance loop is a gate that opens automatically upon entry, but is time controlled to prevent entry after hours. In that scenario the entrance loop detector is connected to a seven day timer.
Wand type vehicle detectors are an alternative that can be used as a vehicle exit detector. It is not recommended that they be used as safety detectors (safety loops). These are not recommended on wide roads, (no wider than 14’) due to their limited detection range. These units are buried shallowly by the side of the road and offer ease of installation. They come as fully self contained (single unit) and with detector/wand option (two piece). The two piece units offer the same options as regular detectors with frequency and sensitivity adjustments.
