Visonic MCTIR252 Users Manual

MCT/IR-252 WP S

Resettable Dual RF & IR Waterproof Transmitter User Guide

1. INTRODUCTION

The MCT/IR-252 WP S is a miniature, water-proof, resettable,
microprocessor controlled, personal transmitter designed for use in
the SpiderAlert signaling network. The transmitter is used ONLY

during emergencies involving security and safety of life, such
that when an alarm is activated, transmissions continue during
the pendency of this alarm condition. Application examples

include elderly hospital patients and emergency nurse calls. The
transmitter has two buttons, used for reporting three different
emergency events: PANIC1 (large button), PANIC2 (small button)
PANIC3 (by clicking on the two buttons simultaneously). The alarm
events are supposed to be acknowledged and reset by the person
who responds to the alarm message by holding a magnet close to
the pendant. In the case that an event is not acknowledged, a No
Response message is sent. In addition to the above-mentioned
events, the transmitter also sends low-battery and supervision
messages (when defined in DIP switch). The transmitter transmits
coded UHF signals and pulsed infrared signals simultaneously,
thereby allowing the target receiver to accurately determine the
specific point at which transmission took place in multi-storey
buildings.

Besides the regular alert mode, in which an alert message is
transmitted only once, the transmitter can be set to two additional
modes – MESSAGE CYCLE and REPEATED MESSAGE
CYCLING. In the message cycle mode, PANIC1, and PANIC2
messages are automatically repeated three times (initially 4 times),
and a no-response message follows if the message has not been
acknowledged. In the cycle repetition mode, a sequence of three
alarm messages followed by a no-response message (one cycle) is
repeated 5 times, unless the message is acknowledged sooner.
The time interval between these messages is determined by the
DIP switches (para. 3.1). When a PANIC1 message is transmitted
after an PANIC2 message has been initiated, the repeated
messages will be PANIC1 messages instead of PANIC2 messages.

When holding an external
magnet close to the unit
pushbuttons, either from
underneath or on top, (fig. 1),
the repetitive message
transmissions stop and an
acknowledge message is sent.

Fig. 1 – Resetting Transmitter

Once the button is
depressed, the LED lights
and after approximately one
second the message is
transmitted.

It is important not to cover
the LED during the period of
time after pressing the
button. When keyed into
transmission, the transmitter
transmits its unique factory

programmed, randomly selected 24-bit digital ID code. There are over
16 million code possibilities, so for all practical purposes no two
transmitters will have the same ID code. The dual-technology alert
transmissions made by the MCT/IR-252 WP
SpiderAlert receivers. These receivers are strategically located all
over the surveillance area, to pick up alert transmissions and report
the ID code of the transmitter whose signal was picked up.

BATTERY
COVER

HOLES
FOR
CHAIN

Figure 2 – MCT/IR-252 WP S

SpiderAlert system

SLC-5UPS

Controller

SpiderBus

PC

SR-520

RF+IR

receiver

Figure 3 – Application Configuration

Reporting is accomplished via a two-wire bus routed to the
SpiderAlert Local Control Unit SLC-5, that collects and transfers all
data to the SpiderAlert main computer automatically displaying the
holder’s name and exact location. All units are supplied with a
chain, to be worn around the neck as a pendant transmitter.

SMALL
BUTTON

MCT/IR-252 WP S

LARGE
BUTTON

S are directed at

2. SPECIFICATIONS

Frequency (MHz): 315 or 868.
IR Transmission Range: 14 m (46 ft) max. with unobstructed line

of sight (para. 5.2).

RF Transmission Range: 30-40m indoors.
Transmitter ID: 24-bit digital word, over 16 million combinations,

pulse width modulation

Message length: 36 bit.
Transmission Duration: Limited by timer to approx. 2 seconds.
Power Supply: 3V lithium battery Panasonic CR2450 or

equivalent.

Current Consumption: 3µA (standby), 10 mA (transmission).

Battery Life: 3 years for typical use.
Battery Capacity: 500mAh
Low Battery Threshold: 2.5 VDC
Operating Temperature: 0° to 50°C (32° to 122°F).
Dimensions: 39x60x18mm (1-7/16x2-3/8x5/8 In.).
Weight: 40 g (1.4 oz).
Color: Violet Transparent.
Compliance with Standards: FCC ID: GSAWTIR201, CANADA:

1467 102 270
Patents: U.S. patent 5,661,471

3. TRANSMITTER MESSAGES

3.1 Internal DIP Switch Functions

The internal DIP switches functions and their default positions (set
by the manufacturer) are detailed in table 1.

To change DIP switch settings, remove the battery as detailed in
para. 4.1 and set the required DIP switch positions. Position the
battery in place and secure the battery cover.

Table 1 - Internal DIP Switch Functions

SW # Description Default

1 Supervision ON/OFF (*) OFF
2 Cycling ON/OFF (**) ON
3 Repeat Cycling ON/OFF (***) ON

DE2411U 1

4 Retransmission Periods (****) OFF

5 Retransmission Periods (****) OFF
*Supervision type
ON - the supervision messages are transmitted every 60 minutes.
OFF– No supervision messages are transmitted.
**Message Cycling
ON – Initially 4 repetitive PANIC1 messages are transmitted

followed by a NO-RESPONSE message, after which 3 repetitive
PANIC1 messages are transmitted followed by a NO-RESPONSE
message.

OFF – a single PANIC1 message is transmitted.

***Repeat Cycling
ON – The Message Cycle is repeated 5 times.
OFF – The cycle is not repeated.
**** Retransmission Periods

time between transmission of repeated messages (see DIP switch
2 and 3) when this option is enabled.

SW 4 SW 5 Period

OFF OFF 30 sec.
ON OFF 1 min.
OFF ON 2 min.
ON ON 4 min.

SW 6,SW 7 and SW 8 NOT USED

(Switches 4 & 5): This is the period of

4. MAINTENANCE AND TESTING

4.1 Battery Installation

A. Place a coin in the slot of the

battery cover.

B. Turn the coin anti clockwise as

far as you can.

Figure 4 – Placing Coin

C. The cover will become slightly

raised.

D. Remove the cover.
E. Take out the battery and

position the new battery with
the positive (+) side up.

F. Reposition the battery cover.

G. Place a coin in the slot of the battery cover and turn clockwise as

far as you can until you hear a click confirming closure.

Figure 5 – Removing Battery

Cover

4.2 Testing

A. Stand 3 m (10 ft) away from the receiver and hold the transmitter

RAISED BATTERY
COVER

3.2 Events Messages

In addition to the transmitter's 24-bit ID, a transmission always
includes an alert code. A low-battery code will be automatically
added to the transmitted data if the battery voltage is below 2.5
VDC. An LED lights steadily during every transmission for 1 sec.

No. Event

Basic Address PANIC1
Basic Address +1 PANIC2
Basic Address +2 PANIC
Basic Address +3 ACKNOWLEDGE
Basic Address +4 NO-RESPONSE

with its two infrared LEDs directed at the receiver. Make sure your
fingers stay clear of the infrared LEDs.

B. Depress the transmit pushbutton and verify that the transmitter's

indicator LED lights.

IMPORTANT! The user should be warned that the infrared (IR)
signal will be transmitted only if the infrared LEDs are kept
exposed, free to radiate into the surrounding space. Infrared
radiation will be blocked if the transmitter is cupped in the palm of
the hand or if transmission is attempted from a pocketed
transmitter. Whenever the infrared source is blocked, the
SpiderAlert network will have to rely on radio signal only, with
lesser accuracy in locating the transmitting unit.

C. Observe that the receiver LED responds to detection: receiver's

indicator LED should light steadily if only the RF signal is
captured, but should flash if both RF and IR signals are captured.

D. Verify that the ID code of the transmitter in use has been registered

by the SpiderAlert head-end computer.

E. Operate the transmitter from various locations within the area

covered by the receiver to determine "dead" spots, where
transmission may be obstructed by walls and large objects, or
affected by structural materials.

5. MISCELLANEOUS COMMENTS

5.1 Comments on IR Signaling

Attaining the maximum IR reception range depends mainly on direct line
of sight between the transmitter and the receiver. Nevertheless, certain
environments allow the signal to reach the receiver in a roundabout path,
by reflection or refraction of the infrared radiation. Tiled floors
(uncarpeted), walls, smooth ceilings (not too high) can reflect IR signals
reasonably well, allowing them to be received even when the radiating
source is pointed away from the receiver. With good indirect reflection
path, a range of 5 - 6 m (15 - 18 ft) is expected (with poor reflection, the
range gets even shorter). The user is therefore strongly advised to point
the transmitter directly at the nearest receiver or, if the location of the
nearest receiver is unknown, to press the transmit button several times
while pointing the transmitter in different directions. It is strongly
recommended not install IR receiver outdoors, facing direct sunlight, or
near fluorescent lamps, to prevent interference to IR reception.

The installer is encouraged to test the reception range in the various
zones and to install additional receivers if necessary.

5.2 Comments on Radio Signaling

Some limitations have to be considered.

A. Receivers may be blocked by radio signals occurring on or near

their operating frequencies, regardless of the code selected.

B. A receiver can only respond to one transmitted signal at a time.
C. Wireless equipment should be tested regularly (at least once a

week) to determine if there are sources of interference and to
protect against faults.

Warning: Changes or modifications to this unit not expressly
approved by the party responsible for compliance could void
the user's authority to operate the equipment.

5.3 Compliance with Standards

The digital circuit of this device has been tested and found to comply
with the limits for a Class B digital device, pursuant to Part 15 of the FCC
rules. These limits are designed to provide reasonable protection against
harmful interference in residential installations.This equipment
generates, uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause
harmful interference to radio and television reception. However, there is
no guarantee that interference will not occur in a particular installation. If
this device does cause interference which may be verified by turning the
device off and on, the user is encouraged to eliminate interference by
one or more of the following measures:

• Re-orient or re-locate the receiving antenna.

• Increase the distance between the device and the receiver.

• Connect the device to an outlet on a circuit different from the

one which supplies power to the receiver.

• Consult the dealer or an experienced radio/ TV technician.

The 868 MHz model of this device complies with the European Council
Directive EMC 89/336/EEC & 92/31/EEC and bear the CE mark and
certification.

VISONIC TECHNOLOGIES. (ISRAEL): 30 Habarzel St. Tel Aviv 69710 ISRAEL Tel [phone] Fax: [phone] E-MAIL: [e-mail]
VTA (VISONIC TECHNOLOGIES AMERICAS): 65 West Dudley Town Road, Bloomfield CT. 06002-1911 USA. TEL.: [phone] FAX: [phone].

E-MAIL: [e-mail]

VT UK (VISONIC TECHNOLOGIES UK): Fraser Road, Priory Business Park, Bedford MK44 3WH ENGLAND. TEL.: [phone]; FAX: [phone]
INTERNET: www.visonictech.com

©VISONIC TECHNOLOGIES LTD. 2004 MCT/IR-252 WP S DE2411U (Rev. 0, 01/05) Warranty enclosed separately

2 DE2411U