27.06.2017
VEK M1H_DE_GB_FR_NL_IT_ES_CE_FAAC_1.docx
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Copyright 2017 by
FEIG ELECTRONIC GmbH
GBR
FEIG ELECTRONIC GmbH Lange Straße 4
D-35781 Weilburg/Lahn
Operation Instruction
VEK M1H
1-channel induction loop detector
for installation on DIN-rail
Please read these instructions and safety information and warn-
ings attentively before initial operation of the detector !
1 General
Applications:
Barrier
controls
Door and gate controls
Parking and traffic technology
Features:
The induction loop detector VEK M1H is a system for inductive recogni-
tion of vehicles with the following characteristics:
Isolated transformer between loop and detector electronics
Automatic calibration of the system after switching on
Continuous rebalancing of frequency drifts
Usable for single place parking space supervising
Sensitivity independent of the loop inductivity
Presence signal by LED display
Potential free relay contacts for presence and pulse output
Pulse output while leaving the loop
Signalling of loop frequency by LED
Loop connection plug-in for diagnosis
For planning and installation of loops please note our manual "detection
of vehicles with the induction loop detector“.
2 Setting
options
2.1 Sensitivity
The setting of the sensitivity calls the electronics to a value of frequency
deviation which a vehicle must produce for setting the output of the
detector. The sensitivity can be adjusted in 4 steps with the two
DIP-
switches ‘s’
on top of the front panel.
sensitivity step
DIP-switch ‘s’
1 low
(0,64 %
f/f)
2 (0,16
%
f/f)
3 (0,04
%
f/f)
4 high
(0,01 %
f/f)
2.2 Hold time and Reset
The hold time can be adjusted with
DIP-switch ‘h’.
At the completion of hold time it will be displayed "free loop" and the
detector calibrates automatically. The hold time starts with the occupa-
tion of the loop.
hold time
DIP-switch ‘h’
5 minutes
infinite
An automatic calibration of the loop frequency will be done by the
detector after switch-on of the power supply. In case of short power cuts
<0,1 s there is no calibration.
A reset with calibration can be effected by changing the hold time
setting.
2.3 Operation
principle of the presence relay
The detector has one relay for presence output and another relay for
pulse output each with a potential free contact. The operation principle
of the presence relay can be changed with the
DIP-switch ‘r’
operation principle presence
relay
DIP-switch ‘r’
contact normally closed
contact normally open
2.4 Frequency
adjustment
The operation frequency of the detector can be adjusted in two steps by
the 3-pole connection jack in the front panel. The permissible frequency
range is 30 kHz to 130 kHz. The frequency depends on the loop induc-
tivity (depending itself on: loop geometry, number of loop turns and loop
lead) and the adjusted frequency step.
upper position
= high frequency
lower position
= low frequency
3
Outputs and LED
3.1 Contact mode of the relays
The following table shows the state of the relay contacts depending on
the detector mode.
detector mode
presence relay
pulse relay
free loop
close
open
open
covered loop
open
close
open
loop gets free
close
open
200 ms pulse
loop failure
open
close
open
power off
close
close
open
In case of a loop failure the detector checks the loop condition cyclically
and continues automatically after elimination.
3.2 LED
signals
The green LED signals that the detector is ready for operation. Via the
red LED, the activation of the relays output is announced depending on
the occupation status of the loop.
LED green
loop
control
LED red
loop
condition
detector function
off off
power
off
flashing
off
calibration or output of
frequency
on
off
detector ready for operation,
free loop
on
on
det. ready f. operation,
covered loop
off on
loop
failure
22,5
m
m
79
,0
m
m
90
,0
mm
