SDC MD-31D User manual

P:\INST INSTRUCTIONS\EGRESS CONTROLS\INST-MD-31DOW REV B 10-21 Page 1
MD-31DOW
SECURITY DOOR CONTROLS ■ WWW.SDCSECURITY.COM
[t] 800.413.8783 ■ 805.494.0622 ■ E-mail: [email protected] ■ 801 Avenida Acaso, Camarillo, CA 93012 ■ PO Box 3670, Camarillo, CA 93011
INSTALLATION INSTRUCTIONS
All wiring connections should be made and verified before any
power is connected to the detector. All power, including
standby battery if used, should be disconnected.
Connect wires to terminals as follows:
Use EMF (voltage) spike-protected relay
when connecting inductive loads to the detector
to protect against possible harmful EMF spikes.
Use Non EMF (voltage) spike-protected relay
for non-inductive loads. When connecting an
inductive load to this relay that is not spike
protected, use either a 1KV 1A diode or 100V,
4A bridge rectifier (See illustration below).
Otherwise relay life may be shortened.
Choose either Fail Safe or Fail Secure operation and wire to
either EMF or Non EMF contacts as follows:
FAIL SAFE
(Switch 2 On)
Power OFF
FAIL SAFE
(Switch 2 On)
No Motion
FAIL SAFE
(Switch 2 On)
Motion Detected
FAIL SECURE
(Switch 2 OFF)
Power OFF
FAIL SECURE
(Switch 2 OFF)
No Motion
FAIL SECURE
(Switch 2 OFF)
Motion Detected
Most UL 1034 listed magnetic locks are already EMF spike-protected
and therefore do NOT require a diode or bridge rectifier, and adding
either could cause response delays. Check magnetic lock specifications.
NON EMFSPIKE-PROTECTED RELAY NON EMF SPIKE-PROTECTED RELAY
Non EMF
(voltage)
spike
protected
relay
EMF
(voltage)
spike
protected
relay
(-) COMMON
+12 OR 24 VDC/VAC
The MD-31DOW combines a passive-infrared detector with relay
output to allow control of door ingress and egress in request-to-exit
(REX) applications. It is UL Listed as an access control device under
the UL 294 standard. It is for indoor use only. MD-31DOW is not
designed for use as the primary means of exit for emergency egress.
MD-31DOW can be ceiling or wall mounted over the door and the
detection pattern can be tailored via vertical aim adjustment and/or
masking of the detection pattern.
The relay outputs consist of two Form "C" contacts that can be
adjusted to latch from 0.5 second to 64 seconds. Resettable or non-
resettable can be selected for the latch time. The relay can also be
programmed to fail safe (doors unlocked) or fail secure (doors
locked) mode in the event of a power loss.
Product specifications:
• Voltage input: 12 VDC or VAC; 24 VDC or 24VAC
• Current draw: 16mA @ 12VDC (see Current Ratings on page 4)
• NO INTERNAL BATTERY. Budget 38mAh per hour standby
• REX detector output: 2 Form C relay contacts rated 2A 30VDC/VAC
maximum for DC resistive loads
• Indicator: Green LED for PIR detection
• Relay latch duration: Adjustable from 0.5 second to 64 seconds
• Timer modes: Selectable for resettable (cumulative) or non-resettable
(counting)
• Power loss operation modes: Selectable for fail safe (doors unlocked)
or fail secure (doors locked)
• Mounting locations: Above controlled door(s), on door frame, wall or
ceiling
• Mounting height: 7’ to 15’
• Housing: High impact ABS plastic
• Dimensions: 7”W X 1.75”H X 1.88”D (178W X 44H X 48D mm)
• Operating temperature: -20°F to 120°F (-29°C to 49°C); RH: 0-85%
• RFI immunity: 26MHz to 1000 MHz @ 50 V/m (FCC)
Application:
Wiring:

P:\INST INSTRUCTIONS\EGRESS CONTROLS\INST-MD-31DOW REV B 10-21 Page 2
Fail Secure-switch OFF: In the event of a power failure, the relay
causes the locking mechanism (such as door strike or magnetic lock) to
remain locked. Use this setting only with AHJ approval as life safety can
be affected. In addition, ensure there is no interference with functioning
of any panic devices associated with the system MD-31DOW is
connected to.
DIP SWITCH 3-LED Enable/LED Disable selection
DIP Switch 3 selects either the LED to light upon detection of motion or
remain off. It Is recommended not to select disable pr10r to walk testing
the detector as it can provide visual feedback of detector coverage
pattern.
DIP SWITCHES 4, 5 and 6-Latch Time selection
DIP Switch 4, 5 and 6 are used in combination to select the duration of
the relay latch time after the relay is activated by motion detection. Use
the following chart to select a latch time from 0.5 second to 64 seconds:
SECURITY DOOR CONTROLS ■ WWW.SDCSECURITY.COM
[t] 800.413.8783 ■ 805.494.0622 ■ E-mail: [email protected] ■ 801 Avenida Acaso, Camarillo, CA 93012 ■ PO Box 3670, Camarillo, CA 93011
The following operational settings must be selected:
DIP SWITCH 1-Resettable/Non-resettable timer selection
DIP Switch 1 selects either relay reset at the end of latch time ("Non-
Resettable") or latch time extension upon additional motion
("Resettable").
Resettable-switch ON: After motion initially activates the relay, each
additional detection of motion causes the latch timer to restart.
Only when there is no longer motion and the latch time Is allowed to
expire will the relay deactivate. This setting is suitable for bypassing a
24-hour contact.
Non-resettable-switch OFF: After motion initially activates the relay,
the relay will deactivate when the latch time ends even if there is
additional motion. This setting is suitable for use with access control
systems.
DIP SWITCH 2-Fail Safe/Fail Secure relay mode selection
DIP Switch 2 selects either Fail Safe (doors unlocked) or Fail Secure
(doors locked) operation in the event of a power failure. Setting selected
must comply with all applicable regulations and be verified by local AHJ
(Authority Having Jurisdiction).
Fail Safe-switch ON: In the event of a power failure, the relay causes
the locking mechanism (such as door strike or magnetic lock) to unlock.
LED Enable-switch ON: LED lights upon detection of motion.
LED Disable-switch OFF: LED remains off.
TIME (Seconds) SWITCH 4 SWITCH 5 SWITCH 6
0.5 (Default) OFF OFF OFF
OFF OFF ON
OFF ON OFF
OFF ON ON
ON OFF OFF
ON
ON
ON
OFF
ON
ON
ON
OFF
ON
1
2
4
8
16
32
64
DIP switch settings:
Selectable operational settings for the detector are programmed via the
six (6) DIP switches on the circuit board and accessible with the
detector cover removed. Switches are in the on position when the
raised part (shown as white below) is in the upward position toward the
word “ON,” and are in the off position when the raised part is in the
downward position toward the switch number. Shown below are
switches 1-5 in the ON position and switch 6 in the OFF position::
1 2 3 4 5 6
ON DP
Installation:
Remove the cover of the detector by inserting a flat head
screwdriver into the slot visible (at the extreme end opposite the
end with the PIR lens) on the back of the detector and prying it off.
Follow instructions for wiring and DIP switch settings.
Route wires through the wiring entrances on the left side of the
detector. For surface wiring, carefully cut out the breakaway notch
provided on the cover at the same end as the wire entrances
appear on the base.
The detector can be mounted from 7ft to 15 ft. (2.1m to 4.6m)
above the floor. Mounting height affects the detection pattern,
generally expanding it as the height Increases.
Mount the base to the mounting surface using mounting screws
supplied. The word "DOOR" on the base must be right side up
(and arrows pointing down toward door) for correct mounting.
Re-insert the detection module into the base (turning counter-
clockwise, opposite of removal shown above). Aim the detector for
coverage desired. Tighten detector module lock screw to prevent
movement of the detector module and disruption of coverage
pattern due to vibration, etc.
To mask the PIR detection pattern, insert masking wedges using
small holes at top and bottom of PIR lens on outside surface of
detector. Masking can reduce unintended activation by persons
not intending egress.
After verifying detection coverage pattern by walk test, make sure
all wiring and DIP switch settings are correct and that detection
module aim is locked. Replace cover and press firmly to snap in
place.
Masking wedge
inserted to block
part of detection
pattern
After aiming
detector for desired
coverage tighten
lock screw to secure
detector positioning.

P:\INST INSTRUCTIONS\EGRESS CONTROLS\INST-MD-31DOW REV B 10-21 Page 3
SECURITY DOOR CONTROLS ■ WWW.SDCSECURITY.COM
[t] 800.413.8783 ■ 805.494.0622 ■ E-mail: [email protected] ■ 801 Avenida Acaso, Camarillo, CA 93012 ■ PO Box 3670, Camarillo, CA 93011
When wall mounted at a height of 15’ with the detector aimed upward
by 14°, the MD-31DOW produces approximately the following
expanded coverage pattern on the floor as seen from above:
Detection coverage pattern:
The ideal installation of MD-31DOW provides responsiveness to the
motion of persons attempting to exit while minimizing unintended
triggering of the detector. Persons moving at a normal pace toward the
door(s) to exit should be able to push the door open without waiting for
the door to . Persons in areas not close to the door and not moving
toward the door to exit should generally not cause the door to unlock by
triggering the detector. Achieving the proper balance of ensuring
responsiveness while minimizing unintended triggering is mostly a
function of the following factors affecting the coverage pattern:
In general, the further from the door the detector is located, the larger
the detection pattern becomes. The higher the detector is aimed, the
further the pattern extends (when wall mounted) though detection
range is limited to about 20 feet (about 6 meters) maximum. Aiming the
detector lower to bring the coverage pattern closer to the door can
help eliminate triggering from persons moving in the vicinity of the door
without intending to exit. When selecting Non-resettable latch time (DIP
switch 2 OFF), adjust latch time (DIP switches 4,5 and 6) to allow
persons intending to exit to reach the door in time after triggering the
detector.
The Fresnel lens of the PIR detector is segmented to provide six (6)
dual detection zones. The body heat (IR energy) of a person moving
through a zone triggers the detector. When wall mounted at a height of
7’ with the detector aimed downward by 14°, the MD-31DOW produces
approximately the following coverage pattern on the floor as seen from
above:
• Choice of wall (including door frame) or ceiling mount
• Mounting height
• Aiming of the detector (vertical only)
• Masking of the PIR lens (see “Installation” on previous page)
Aiming the detector lower brings coverage closer to the door,
possibly reducing unintended triggering of the detector. When
wall mounted at a height of 7’ with the detector aimed downward
by 14°, the MD-31DOW produces approximately the follwing
coverage pattern on the floor as seen from above:
When wall mounted at a height of 15’ with the detector aimed
downward by 14°, the MD-31DOW produces approximately the
following expanded coverage pattern on the floor as seen from
above:
Viewed from the side, the coverage range is approximately as
follows:
To provide a more responsive egress for double doors, mount
one MD-31DOW above the center of each door and wire the
outputs so that detection of motion by either detector will unlock
the doors. In most cases, masking the inside zones on both
detectors will not affect responsiveness yet may reduce the
possibility of triggering from insertion of an object between the
two doors.
The gap between double doors without a center post may allow
intruders to trigger the motion detector by inserting a hot or cold
object into the detection pattern. An alternative mounting option
should be chosen to avoid this possibility, such as ceiling
mounting away from the door.

UL 294 LISTED
ACCESS CONTROL SYSTEM UNITS
Edition 6
ACCESS CONTROL
P:\INST INSTRUCTIONS\EGRESS CONTROLS\INST-MD-31DOW REV B 10-21 Page 4
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Installation testing:
All wiring connections should be made and verified before
any power is connected to the detector. All power, including
standby battery if used, should be disconnected.
Do not replace detector cover before the following have
been completed:
• All wiring connections have been made and verified
• Detector has been properly mounted
• A walk test has been conducted to confirm coverage and proper
functioning of the system
Apply power to the unit after determining all wiring connections have
been properly made and that no hazards exist. The detector's green
LED will initially flash on and off unless it has been disabled (DIP
switch 3 set to OFF position). The LED should be enabled (DIP
switch 3 set to ON position) to conduct a proper walk test and can
be disabled afterward if required prior to replacing detector cover.
Allow the detector to stabilize for five (5) minutes. Conduct a walk
test by approaching the door from all angles that persons can
normally be expected to approach from and verify responsiveness.
Adjust the detector aim up or down as necessary to optimize the
detection pattern. Also verify that traffic not intending to exit does
not typically trigger the detector. If necessary, adjust the detector
aim. Mask the PIR lens if necessary.
Be sure to tighten the lock screw for the detector aim after
detection coverage has been finalized.
Ensure that latch duration allows enough time to reach the door
after detection and adjust if necessary.
Verify Fail-Safe or Fail-Secure operation by temporarily
disconnecting power to the unit and determining that door is
unlocked (Fail-Safe) or locked (Fail-Secure). Reset DIP switch 2 if
necessary and repeat test. Setting selected must comply with all
applicable regulations and be verified by local AHJ (Authority
Having Jurisdiction).
After confirming the detector is operating as required (including
leaving LED enabled or disabling it following final walk test), replace
the cover and perform one final walk test to ensure proper
operation. he detector should be tested at least once a year to
ensure proper operation of all functions.
Important Note:
MD-31DOW is designed for installation by properly trained,
experienced and qualified low-voltage technicians. It should be
installed in compliance with all applicable local, regional and
national electrical and safety codes.
Performance Level
MD-31DOW meets the following performance levels for
Access Control (UL294 6th Edition):
Feature
Destructive Attack
Line Security
Endurance
Standby Power
Level
I
I
IV
I
Current Ratings:
The following are the maximum current ratings for each input
voltage:
Input Voltage
12VDC
12VAC
24VDC
24VAC
Maximum Current
16mA
18mA
20mA
22mA
Install in accordance with National Electric Code (NEC 70)
and the applicable National Fire Protection Association
(NFPA) Installation Standards, local codes and the local
Authority Having Jurisdiction (AHJ).
All Circuits Class 2
SECURITY DOOR CONTROLS ■ WWW.SDCSECURITY.COM
[t] 800.413.8783 ■ 805.494.0622 ■ E-mail: [email protected] ■ 801 Avenida Acaso, Camarillo, CA 93012 ■ PO Box 3670, Camarillo, CA 93011
BP21043