Installation Manual

EXI HALO Installation Manual Rev 2.0
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EXI Wireless Systems Inc. Page 6 June, 1999
2. DECISIONS TO MAKE PRIOR TO INSTALLATION
2.1. SYSTEM WIRING
The HALO network is based on the RS-485 electrical interface standard, which is 2-wire multi-node
bus. The EXI HALO elements are designed such that many more than the RS-485 limit of 32 Drivers
and 32 Receivers can be co-exist on the same network. The baud rate used in the HALO system is
57,600 bps, and therefore in order to avoid data corruption it is important to ensure that a clean signal
is always present. Using the right type of cable, network topology, and not exceeding total cable length
are critical factors in ensuring that the system will operate reliably.
Figure 2 - "Bus" Topology Figure 3 - "Star Topology
Cable capacitance is a large factor in determining the quality of the signal on the network, and EXI rec-
ommends that cables with capacitance of greater than 15 pf per foot should be avoided. The network
should be constructed using a “multi-drop bus” type topology, avoiding any “star” type configuration.
The system is designed to operate with up to 4,000 ft of cable with the recommended topology and ca-
ble. The total cable length varies depending upon the cable capacitance and effective resistance, topol-
ogy, and number of devices on the network. If the estimated total cable length is greater than 4,000 ft, a
RS-485 Repeater will be required to ensure that the system works reliably, or works at all.
It is also recommended that a Repeater be used to isolate HALO Elevator Controllers from the main
system to minimize noise pick-up and loading of the system. Cables used in Elevator shafts should be
stranded and not solid, and should be resilient enough to withstand the continuous flexing that it will
experience for many years in the elevator shaft.
Figure 4 - Typical HALO Configuration
R2 RECEIVER
DATA
COMM.
Made in Canada . . with care
12/24 VDC GROUND DATA 0 DATA 1 N/O 1 COM 1 N/C 1 N/O 2 COM 2 N/C 2
1 2 3 4 5 6 7 8 9 10
POWER
RELAY
Controller 1
Whip
Antenna
Exciter
Antenna
HALO Network
RECEIVE
ANTENNA RBC
FCC ID# HE7MAX
TRANSMIT OUTPUT
SEA #1 SEA #2
Made in Canada . . with care Controller
by
Power
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
+24V DC Input System Ground +12V Ou 200 ma System Ground Weigand 0/Data Weigand 1/Gnd System Ground MagOut 24V 200 ma Door Switch In System Ground Unlock In Override In Strobe In N.O COM N.C. N.O COM N.C
Relay #1 Relay #2
Alarm In
OFF ON
EXI ELECTRONIC SYSTEMS
Winnipeg, Manitoba [phone]
Made in Canada
PRODUCT
MODEL NO.
SERIAL NO>
ROAM II/TAGRRR
SEA-M
1118
Controller 2
Whip
Antenna
Exciter
Antenna
RECEIVE
ANTENNA
RBC
FCC ID# HE7MAX
TRANSMIT OUTPUT
SEA #1 SEA #2
Made in Canada . . with care Controller
by
Power
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
+24V DC Input System Ground +12V Ou 200 ma System Ground Weigand 0/Data Weigand 1/Gnd System Ground MagOut 24V 200 ma Door Switch In System Ground Unlock In Override In Strobe In N.O COM N.C. N.O COM N.C
Relay #1 Relay #2
Alarm In
OFF ON
Winnipeg, Manitoba [phone]
Made in Canada
PRODUCT MODEL NO.SERIAL NO>
ROAM II/TAGRRR SEA-M 1118
RIM
RIM
Receiver 1
Whip
Antenna
RIM
RS485 Bus
TAP
TAP
TAP
PC
Terminator
RS-485
Repeater
Elevator Controller
RIM