Ingersoll-Rand LCN 7940-8770 User Manual

LCN

®

7940-8770 Presence Sensor

Installation Instructions

LC N

Hardware Products

121 West Railroad Avenue
Princeton, IL 61356-0100
1-800-526-2400
FAX: [phone]
www.lcn.ingersollrand.com

®

© 2006 Ingersoll-Rand Company Limited

DESCRIPTION

TECHNICAL
SPECIFICATIONS

COMPONENT ID

The LCN Presence Sensor (PN: 750182-00) is a self-monitored ready overhead-mounted diffused active infrared
sensing device that provides detection for the triggering of automatic swing door safety functions. When used with
LCN’s lockout devices, the sensor is programmed to allow two different fields of detection - one for detection when
the door is in the fully closed position and the other for detection when the door is fully open. While the door is in
the fully open position, the Presence Sensor extends its coverage back through the threshold area of the doorway,
to provide coverage that will overlap with LCN’s motion sensors.
As with all of LCN’s programmable sensing devices, full adjustability is achieved with the use of LCN’s hand-held
remote control unit. This allows alteration of all of the available functions as well as for inquiry of existing settings.
Should the need arise; the Presence Sensor may also be tuned by means of two sensor-mounted buttons
contained on the PC Board within the unit. With these two buttons, the Presence Sensor’s field of detection can be
altered without the use of the hand-held remote. If a complete door-mounted safet y sensor (DMSS) system is not
used in addition to the Presence Sensor, LCN recommends the use of a lockout safety beam to allow safety
signaling if the zone is entered during a door closing cycle.

Installation Height - Variable 9’-0” max. (recommended 6’-6” to 8’-0”)
Mounting Angles

Presence Sensor only

Presence Sensor with BodyMount
Power Supply 12 to 24 V AC / DC +/- 10%
Frequency 50-60 Hz
Output Max. Voltage at contacts: 60V DC / 125V AC

Relay Hold Time 0.5 to 9 seconds
Operating Temperature -22°F to +140°F
Immunity Immune to electrical and radio frequency interference
Cable 4’- six conductor cable
Weight 1lb. 11 oz. (765g)
Dimensions 11.8”L (305 mm.) x 1.9”H (51 mm.) x 1.9”W (46 mm.)
Material Aluminum & ABS plastic
Housing Color Black anodized aluminum

Left Lens

+5°, +10° (factory default setting: +5°)
0°, +5°, +10°

Max. Current at contacts: 1 A
Max. switching power: 30 W (DC), 60 VA (AC)

Red LED

Right Lens

INSTALLATION
TIPS

75.5255.02 XXXXXXXX
7940-8770 LCN Page 1 of 11

 The sensor must be
firmly fastened to
prevent vibration.

 The sensor must not have

any unwanted objects likely
to move or vibrate in its
path.

Right End Cap Left End Cap

Center Eye Shield
4’ Cable

 The sensor should be

mounted flush with bottom of
door header.

SAFETY
PRECAUTIONS

• Shut off all power going to the header before attempting any wiring procedures.

• Maintain a clean & safe environment when working in public areas.

• Constantly be aware of pedestrian traffic around the door area.

• Always stop pedestrian traffic through the doorway when performing testing that may result in unexpected

reactions by the door.

• Always check placement of all wiring and components before powering up to insure that moving door
parts will not catch any wires and cause damage to equipment.

MECHANICAL
INSTALLATION ­PREPARATION

To prepare the Presence Sensor for mounting to the header, perform the following:
a) Remove both end caps from the Presence Sensor (picture 1). Each is attached by one Phillips head screw.

1 2

b) Remove both lenses from Presence Sensor by simply sliding them out at each end, as shown above in

picture 2.

c) Remove the center eye shield as shown in picture 3 (take care not to damage the light tube on the inner

side of the shield). Simply pull out from the top end and rotate out as shown below.

3

4

d) Slide the PCB out of the extrusion and set it aside as shown above in picture 4.

MECHANICAL
INSTALLATION –
PLACEMENT OF
THE SENSOR

Remember these guidelines when installing a Presence Sensor:

 The Presence Sensor should be mounted at a height range of 6’ 6” to 8’. Maximum mounting height is 9’.
 The Presence Sensor should be mounted above the door on the swing side.
 The Presence Sensor shall be mounted flush with the bottom of the automatic door header. This is absolutely

necessary to allow the detection pattern to reach back through the threshold area when the Presence Sensor
is in the open door position.

 For single door applications, the Presence Sensor should be mounted at the center of the door opening.

However, if this is not possible, the unit may be installed off-center. In such cases, pattern location will have to
be altered for proper placement of the field of detection. Try to avoid mounting locations that may pose
potential problems such as directly over a door arm.

 For double-egress applications, one Presence Sensor

should be mounted over each swing-path. There should
be at least 40” of separation between the 2 Presence
Sensors when measured between the centerline of each
sensor.

WallSwitch

An optional BodyMount
3” Standoff may be used
during sensor installation

20” min

20” min

 If the Presence Sensor is the onl y sensor being used for

safety at the swing side of the door, to be in compliance

Presence Sensor

with ANSI 156.10, a lockout safety beam or door
mounted safety side (DMSS) is needed in addition to the
Presence Sensor.

Presence Sensor

 For all applications, refer to the pattern charts for

width and depth in the applicable section of this
Guide. Patterns shall be adjusted to achieve
maximum detection zones, and shall be in
compliance with all applicable safety standards (i.e.
ANSI A156.10).

WallSwitch

75.5255.02 XXXXXXXX
7940-8770 LCN Page 2 of 11

pp

MECHANICAL
INSTALLATION

NOTE: LCN recommends the use of a BodyMount P/N 761222-79 for most Presence Sensor applications. The

BodyMount is a 3” standoff that allows the Presence Sensor to be slightly distanced from the face of the
closed door. This helps to prevent ghosting caused by slight door movement while closed, and also
prevents ghosting when Door Mounted Safety Sensors are used (as the Door Mounted Safety Sensor
extrusions at the top of the door are extremely close to the sensor while the door is closed).

1. The extrusion has pre-drilled mounting holes at each end as shown below in pictures 5 & 6.

5

6

Pre Drilled

Mounting Holes

rox. 9 ¾” Apart

A

2. Hold the Presence Sensor up to the pre-determined location, and attach using the 2 self-drilling screws
that are included with the package, as shown in picture 7 below. It may be necessary to pre-drill a pilot
hole (picture 8) in the header for ease of screw installation. Ensure that Presence Sensor is mounted
securely at each end.

7

8

3. If Presence Sensor is mounted directly to door header, and cabling is to pass directly into header, drill a ¼”
hole next to the Presence Sensor’s left side end cap to allow wire passage into header as shown below.
The wire passage hole should be in a location that aligns with the cut out in the end cap as shown below.

9

ELECTRICAL
INSTALLATION
AND CABLING

Once the Presence Sensor is securely attached to header, cabling & wiring may be completed.

1. Install the 10-pin connector as shown below in picture 10. If wiring the Presence Sensor to a LCN module, refer to
the schematic for the respective module.

10

1 PWR
2 PWR
3 COM
4 NO
5 NC
6 IN ­7 IN +

10 PIN

10 PIN

Position Connection 7-Pin Wire Color (10-pin cable)

1 12 to 24 V AC / DC

Red

+/- 10%

2 24 to 24 V AC / DC

Black

+/- 10%
3 Common White
4 Normally Open Green
5 Normally Closed
6 Data - Brown
7 Data + Blue

75.5255.02 XXXXXXXX
7940-8770 LCN Page 3 of 11