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6.2 VOORBEREIDING BEKABELING
Before installation begins, consideration must be made for where to run the wires and decide on
what feedback is required from the lock. There are a total of seven available connections; three are
compulsory power/control connections whilst the remaining four provide optional door and bolt position feedback. These
optional connections can be integrated into access control or alarm systems to provide full monitoring.
The correct gauge of wire needs to be chosen as voltage drop across the power/control wires can limit the locks operation.
For all the remaining connections, a lower gauge wire can be used as these are only signal wires. The following table
shows the maximum distance that the wire runs can be between the power supply and the lock, assuming the power
supply outputs 12VDC or 24VDC.
Conductor Cross Sectional Area
Maximum Distance
#AWG
(mm²)
at 12VDC
at 24VDC
24
0.20
10m
30m
22
0.33
16m
48m
20
0.52
26m
77m
18
0.82
41m
122m
16
1.31
65m
195m
14
2.08
103m
310M
6.3 VOORBEREIDING STROOMPRINCIPE
The ML420 can be set to one of two operating modes before installation, Fail Safe or Fail Secure.
When the operating mode is set to Fail Safe, supply voltage is applied to the control input to lock the door, and the ML420
will unlock in the event of power loss.
When the operating mode is set to Fail Secure, supply voltage is applied to the control input to unlock the door, and the
ML420 will lock or remain locked in the event of power loss.
The failure mode of the ML420 is factory set as Fail Safe. Before the lock is installed this can be changed to Fail Secure
by repositioning the switch located at the end of the product.
ELEKTRISCHE SLOTEN
