MCT-231, MCT-231WP
Code-Secure™ Pendant Transmitter
1. INTRODUCTION
The MCT-231 is a miniature pendant transmitter, designed for
alarm and remote control applications. When enclosed in a
waterproof case, this transmitter's reference designation is
MCT-231WP. When activated, the transmitter sends out a Code
Secure™ digital sequence identifiable by compatible Code
Secure™ receivers. Each transmission comprises a digital
sequence that differs from the one used in the previous
transmission and which only the target receiver can recognize.
"Code grabbing" is therefore not possible.
Transmission is initiated by depressing the pushbutton at the
center of the unit. Operating power is obtained from a coin-type,
3-volt lithium battery.
An LED lights during transmission, indicating that the battery
voltage exceeds 2.4 V. If the LED flashes during transmission,
the battery must be replaced immediately. In addition, a "low
battery" report will be transmitted with the outgoing digital
message. Compatible receivers are designed to identify this
report and operate a corresponding output.
All MCT-231 units are supplied with the chain installed, to be
worn around the neck as pendant transmitters. A key ring is also
included in the package, for use in place of the chain.
2. SPECIFICATIONS
Frequency (MHz): 315, 433.92, 869.2625 or other frequencies
according to local requirements.
Modulation: ASK (ON-OFF keying)
Transmitter ID: 28-bit digital word, Code Secure™
Power Supply: 3-volt Lithium cell (Toshiba type or equivalent).
Nominal Battery Capacity: 220 mAh
Battery Life Expectancy: 3 years (for typical use)
Battery Supervision:
Good battery - LED lights steadily upon activation.
Low battery - LED flashes upon activation.
Note: If transmission is still possible despite the battery condition,
the MCT-231 will send a low battery report to the receiver.
Operating Temperature: 0° to 50°C (32° to 122°F).
Dimensions:
MCT-231: 32 x 53 x 17 mm (1-1/4 x 2-1/8 x 11/16 in.).
MCT-231WP: 40 x 61 x 17 mm (1-9/16 x 2-3/8 x 11/16 in.)
3. TESTING AND MAINTENANCE
3.1 Testing a New Unit
Since the MCT-231 and the MCT-231WP are supplied with the
battery already installed, the units are practically ready to be tested.
A. "Teach" the target receiver the ID code of the tested transmitter,
as instructed in the target receiver's installation manual.
B. Stand 3 m (10 ft) away from a target receiver and operate the
MCT-231 by depressing its transmit pushbutton. Verify that
the transmitter LED lights, indicating good battery condition.
C. Observe that the receiver's LED lights steadily, and make
sure that the controlled circuit reacts as programmed.
D. Operate the transmitter from various locations within the area
covered by the target receiver to determine "dead" locations,
where transmission is blocked by walls and large objects, or
affected by structural materials.
Note: If dead/marginal zones are a problem, relocating the
receiver may improve the performance.
3.2 Battery Life
The original battery supplied with the transmitter can last up to 3
years if used sparingly (only a single transmission per day).
DE2361
Installation Instructions
LED
INDICATOR
MCT-231
3V LITHIUM
BATTERY
Figure 1a. MCT-231 with Cover Removed
LED HOLE
AND LENS
REAR OF
FLEXIBLE BUTTON
Figure 1b. MCT-231WP with Cover Open
Weight:
MCT-231 (without chain): 18 g (0.65 oz).
MCT-231WP (without chain): 25g (0.88 oz).
Color: Gray
Compliance with Standards: Meets FCC part 15, MPT 1340
and Directive 1000/5/EC
EN 50131-2, Grade 2, Class II
This device complies with Part 15 of the FCC Rules and RSS-210 of
Industry and Science Canada. Operation is subject to the following
two conditions: (1) This device may not cause harmful interference,
and (2) this device must accept any interference received, including
interference that may cause undesired operation.
This device complies with the essential requirements and
provisions of Directive 1999/5/EC of the European Parliament and
of the Council of 9 March 1999 on radio and telecommunications
terminal equipment.
Battery replacement will therefore be needed very rarely. To
replace the battery proceed as in 3.3 and 3.4, below.
3.3 Opening the Case
A. Open the case as follows:
MCT-231 – follow the instructions in figure 2 below.
MCT-231WP – loosen and remove the 4 screws at the back.
Figure 2. Opening the Case
PUSH-
BUTTON
SWITCH
RECESSED
PUSHBUTTON
SEALING
GASKET
BATTERY
SCREW HOLE
(1 OF 4)
1
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