DE4040
1
WRP
WRP
WRP
WRP-600
-600
-600
-600
Microprocessor-Controlled Wireless Repeater
Installation Instructions
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11
1. INTRODUCTION
. INTRODUCTION
. INTRODUCTION
. INTRODUCTION
The WRP-600 is a microprocessor controlled wireless repeater,
designed to relay digital data between wireless transmitters and a
target receiver. Repeater links are required when the target
receiver is beyond the range of at least some of the wireless
transmitters and is therefore incapable of receiving transmissions
directly (refer to Figure 1).
As a communication range extender for all Visonic Ltd. low-power
wireless transmitters, this repeater is compatible with the standard
line (WT/WR series) that uses 12-bit DIP-switch programmable
codes and with the new "PowerCode" family (MCT/MCR series)
that uses 16,000,000 self-learning codes.
A WRP-600 repeater
can simultaneously serve both 12-bit and PowerCode
networks that coexist in the same area (but is not compatible
with CodeSecure™ equipment).
If the distance between the transmitters and the target receiver is
too large to be covered with one repeater, several auxiliary
repeaters may be added along the communication path. This
way, a multi-level network is created (see Figure 2).
Up to 16 auxiliary repeaters can be interposed between the
farthest group of transmitters and the target receiver.
Figure 1.
Single-Level Repeater Configuration
Each repeater must be assigned a correct
LEVEL TAG for the system to operate properly.
The repeater closest to the target receiver is at
LEVEL 0, and level numbers go up with each
added repeater, up to LEVEL 15.
A receiver module, a transmitter module and a
controller motherboard are the building blocks
of the WRP-600. All 3 units are packaged in
a small-size, easy-to-install plastic housing.
Both
receiver
and
transmitter
use
short,
down-
hanging wire antennas. The WRP-600 repeater is powered by 13
to 20 VDC supply or 11-16 VAC. A 9-Volt nickel-cadmium
rechargeable battery provides backup in case of mains power
failure.
The battery is recharged by a built-in charger. A fully charged 110
mA/h battery will provide about 5 hours of emergency operation
at 1:1 receive/transmit ratio.
Figure 2.
Multi-Level Repeater Configuration
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22
2. SPECIFICATIONS
. SPECIFICATIONS
. SPECIFICATIONS
. SPECIFICATIONS
Operating Frequencies:
Any one of 315, 404, 418, 433.9 MHz,
or other frequencies in accordance with local requirements.
Receiver Type:
Super-regenerative.
Modulation Type:
100% ASK.
System Codes
(in 12-bit systems):
8-bit digital word, 256
combinations, pulse width modulation.
PowerCode ID:
One of 16,000,000 possible 24-bit codes
Power Input Ranges
: 13 - 20 VDC, or 11 - 16 VAC, 100 mA min.
Backup Battery:
9 V (8.4 V), 110 mA/h rechargeable Ni-Cd type.
Current Consumption
@ 14 VDC
:
•
With Rechargeable Battery: 17.5 mA.
•
Without Battery: 5.5 mA.
Note:
There is no change in current consumption between the
receive and transmit modes
.
Battery Backup Duration:
Approx. 5 hours with a fully charged
110 mA/h Ni-Cd battery and 1:1 standby/transmit ratio.
LED indicator:
Lights during transmission.
Compliance with Standards
: Meets FCC Part 15, ETS 300-220
and MPT 1340. The 418 & 433.92 MHz units comply with
European Council Directive EMC 89/336/EEC & 92/31/EEC, and
bear the CE mark and certification.
Operating Temperature:
0°C to 49°C (32°
F to 120°
F).
Dimensions (H
x
W
x
D):
110
x
63 x
25
mm
(4-5/16 x 2-1/2 x 1 in.).
Weight:
73 g (2.6 oz).
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33
3. FUNCTIONALITY
. FUNCTIONALITY
. FUNCTIONALITY
. FUNCTIONALITY
3.1 Interfacing with 12-Bit Systems
In 12-bit systems that do not employ WRP-600 repeaters, 8 bits
are used for the system code, and all transmitters as well as the
target receiver are set to the same 8-bit code.
With WRP-600 repeaters in use, it is sometimes required to
determine which transmitter will take advantage of the repeater
and which transmitter will send its data directly to the target
receiver without repeater intervention.
To make this possible, all transmitters intended to send their
signals via the WRP-600 must transmit a system code combi-
nation in which the 8th (most significant) bit is OFF.
The repeater programmed for operation at LEVEL 0 (the one
closest to the target receiver) rejects any system code in which
the 8th bit is ON. On the other hand, it accepts any system code
in which the 8th bit is OFF, but inverts the 8th bit upon retrans-
mission (the 8th bit in the retransmitted code becomes ON).
In order to receive the retransmitted code, the target receiver
should be set to the same code as that retransmitted by LEVEL 0
repeater (with the 8th bit ON).
Transmitters deployed in close proximity to the target receiver
must be set to the same code as that of the receiver. Since the
8th bit of their code is ON, their signals will be rejected by any
repeater but not by the target receiver.
