SpiderAlert SR-500 Installation Instructions

SR-500 SR -500, SR
SR SR -500 -500
SpiderAlert Wireless Receiver
1 1 1 1 . INTRODUCTION . INTRODUCTION
. INTRODUCTION . INTRODUCTION
SR-500 wireless receiver is as an interface unit between various
SpiderAlert wireless transmitters and the SpiderBus.
SR-500 ER is the extended range version of the SR-500. It has
the following features:
• Higher receiver sensitivity that enables longer communication
range.
• Improved receiver selectivity (narrower bandwidth) that
prevents reception of interfering signals from undesired
transmitters (whose frequencies are near the receiving
frequency).
SR-500 (ER) receives RF signals from SpiderAlert transmitters
and relay the signals to the SpiderAlert Local Controller SLC-5
via the SpiderBus. All data collected by the SLC-5 is transferred
to the head end computer for further processing (see fig. 1-1).
Figure 1-1. SR-500 (ER) in the SpiderAlert System
Each receiver has a factory-programmed, 8-bit ID number (in a
2-digit hexadecimal form) that is marked on top of its
microprocessor IC.
2 2 2 2 . SPECIFICATIONS . SPECIFICATIONS
. SPECIFICATIONS . SPECIFICATIONS
Operating Frequency (MHz): 315, 404, 418, 433.92 or other
frequencies according to local requirements.
Receiver ID Code: 1 of 255 possible codes, factory programmed
Data Transfer to Bus: Serial, software controlled.
Operating Voltage Range: 10 - 16 VDC.
Number and type of Inputs: 3, Normally closed (NC)
Number of Outputs: 2
3 3 3 3 . . . . OPERATION ROUTINE OPERATION ROUTINE
OPERATION ROUTINE OPERATION ROUTINE
3.1 Message Handling
When a coded message is received from SpiderAlert transmitter,
the receiver registers it and checks whether the bus is busy. If so,
the receiver pauses to prevent collision of its message with other
messages, and then tries again. If the bus is free, the receiver
reports the transmitter's ID code, be it 12-bit or 24-bit,
accompanied by its own 8-bit ID number.
Once the message is received by the SLC-5, an "acknowledge"
signal is returned to the receiver, causing it to stop sending the
data. If there is no response from SLC-5, the receiver will keep
sending the data repeatedly,
acknowledgement. The receiver will not be free to receive new
coded transmissions until it gets this acknowledgement.
A special on-board LED lights upon reception of a valid RF
signal. It will remain illuminated while the receiver is engaged in
sending the message via the data bus or while the receiver is
waiting for an acknowledge signal from SLC-5. The LED turns off
5 seconds after reception of acknowledge signal from the SLC-5.
DE3211
, SR-500 -500 ER
, SR , SR -500 -500
until SLC-5 returns
ER
ER ER
Attendance reports with the receiver ID
number are sent by each receiver to the
SLC-5 at regular intervals, thus permitting
continuous supervision
receiver network (see Para. 3-2).
SR-500 (ER) also responds to command
signals sent from the computer via the SLC-5
controller and SpiderBus. Each command
signal is addressed to a specific receiver, for
controlling one of its two output circuits.
This allows the attendant at the head end to control remote
equipment such as sirens, lights or automatic voice announcers,
that can be turned on and off by direct connection to receiver's
output or via a relay.
The receiver can be remotely programmed from the SpiderAlert
main station - programming of the receiver ID number and the
duration of its outputs 1 and 2 signals in "pulse" operation mode.
The receiver is protected against tampering by an on board
tamper switch that is actuated upon removal of the front cover.
Once tampered with, the receiver sends out its ID code plus a
special tamper code to the head end computer.
A sensitivity control (marked RANGE, see fig. 4.3) is provided on
the printed circuit board, to enable reception range adjustment.
A terminal block at the top (see fig. 4.3) provides a 4-wire
connection to the SpiderAlert bus and two output terminals for
controlling external devices (for details, refer to para. 3-3). A
right-hand side terminal block (fig. 4.3) provides 3 input terminals
for reporting local alarms (for details, refer to para. 3-4).
When a deliberate (or accidental) jamming signal is received, the
receiver sends a jamming alert message.
Open Collector Output Current Sinking Capability: 100 mA.
Current Consumption @ 13.6 V:
SR-500: 7.2 mA (Standby), 8.8 mA (in operation)
SR-500 ER: 37 mA (standby), 39 mA (in operation)
Operating Temperature Range: 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: SR-500 - 80g (2.8 oz.), SR-500 ER - 78g (2.75 oz.)
3.2 Supervision Method
The receiver is programmed to send out periodic attendance
messages. An attendance message consists of the receiver's ID
number and a special test code identifying the message as an
attendance report. Once the SpiderAlert network is powered up,
all receivers on the bus go through the first cycle of attendance
reports. The SLC-5 automatically "learns" the participating units'
ID numbers, registers their IDs and creates a supervision list.
After the first reporting cycle, the SLC-5 will expect regular
attendance reports from each unit on its list.
an
Attendance reports received at regular (correct) intervals are
acknowledged by the SLC-5 but not displayed by the head end
computer. However, attendance reports received for the first time
or after a break in communication between the receiver and the
SLC-5 will be displayed on the head end computer screen.
If an attendance report from a specific receiver fails to come in
within 4 minutes from the last report, a warning appears on the
computer's monitor. If attendance reports from a certain receiver
or from a group of receivers stop, the reason might be SpiderBus
discontinuity (an "open" bus), receiver failure or sabotage.

Installation Instructions

over the entire
Figure 1-2.
External View
3-11