Securitron MK_Series - Manual (Page 2)

PN# 500-11700
Page 2 Rev. D, 11/11
lip of the mounting frame which extends into the drywall. To compensate for this, simply cut
along the outside of the marked rectangle as the thickness of the drywall saw blade is about the
same as the thickness of the mounting frame lip. See Figure 1 below.
FIG. 1: INSTALLING THE DRYWALL MOUNTING FRAME
TO MARK FOR CUTTING, LAY THE MOUNTING FRAME AGAINST
THE DRYWALL AND TRACE AROUND THE INSIDE WITH A
PENCIL. THEN, USE YOUR DRYWALL SAW ON THE OUTSIDE OF
THE LINE TO COMPENSATE FOR THE THICKNESS OF THE LIP.
3. ELECTRICAL CONNECTIONS
The switch will have color coded wires soldered to it as follows: White = Common; Red =
Normally Closed; Blue = Normally Open. The bicolor LED (Securitron part number 030-12500)
can illuminate red or green and has 3 wires attached to it: Red, Green and Black. Black is
common DC negative. Red is the +VDC input to illuminate red. Green is the +VDC input to
illuminate green. Note that the black wire has 2 resistors on it. If the resistors are left as
they are, the LED will operate on 24 volts. For 12 volt operation, remove the outer
resistor. With this set up, you can use either color for your indicator or even alternate red and
green to show 2 different conditions. The LED's could be operated, for instance, from an SPDT
switch to change colors. You cannot, however, drive both sides of the LED at the same
time (the indicator would show orange) or the resistors will be overloaded. If you need to be
able to drive both colors at the same time to display a third (orange) condition, remove both
resistors on the black wire and connect individual resistors on the red and green wires. The
values would be: 620 Ohms 1/2 watt for 12 volts and 1300 Ohms 1 watt for 24 volts.
If you have alternate and momentary switches supplied, they are identified by the numbers
stamped on the switch body:
(MK) Momentary = 8Y1021 or 106F
(MK2) Momentary = 8Y2021 or 206R
(MKA) Alternate = 8Y1011 or 106D
(MKA2) Alternate = 8Y2011 or 206N
The switch contacts will handle up to 3 amps of current. Note finally that the switch actuator
has a black nylon cover on it. If the cover wears away, the assembly will still function as the
switch actuator is steel under the cover.