Rs-485 Daisy Chain Wiring - Intertek 1802 Installation & Owner's Manual

RS-485 Configurations
Device Address
Every RS-485 device (keypad, card reader, MicroPlus RF
receiver) must have a unique address assigned to it, starting
with 003. The address selector switches are located on the
RS-485 circuit board (see instruction sheets that come with
each RS-485 device). The address order of the devices
connected to the access plus system does not matter. What is
important is that the addresses must be numbered in
sequence. Do not skip a number in the address sequence
and start the sequence with 003
(e.g. If three (3) RS-485 devices are daisy chain wired to the
access plus system and their addresses are 003, 004 and 006,
this is wrong. They must be addressed 003, 004 and 005).
The 2 internal relays on the access plus system circuit board
are 001 and 002. Valid RS-485 external device addresses for
use with the Access Plus system are 003, 004, 005, 006,
007 and 008.
Important Note: The device address is referred to as a "Relay
Number" in the programming software.
ON
Device Termination Switch
A termination switch is located on every RS-485 circuit
board. The termination switch must be turned OFF for
every device wired in a daisy chain except for the last
device. It must have it's termination switch turned ON.
A single RS-485 device wired to the access plus system
must have it's termination switch turned ON. A maximum
of 2 devices or 2 daisy chains can be individually wired to
a single unit (Only 2 terminated devices allowed).
ON
Access Plus System
SW2
SW2 Termination Switch
Single run (Daisy chain) of RS-485 devices. SW2 ON.
Runs in two different directions of RS-485 devices. SW2 OFF.
Some Configuration Problems to Avoid:
The total distance for the complete wire
1
run is greater than 4000 ft.
There are more than 6 RS-485 devices.
2
There are more than 2 wire runs coming
3
out of the access plus system.
There are more than 2 end devices
4
terminated and/or incorrect end device
terminations (Not turned ON).
There are more than 6 addresses and/or
5
duplicate or skipped addresses.
An RS-485 device can not have 2 RS-485
6
devices separately continued from it.
The access plus system must have it's
7
SW2 termination switch turned OFF when
2 terminated end devices are being used.
26
CORRECT Configuration Samples
Internal Addresses
001 for Relay 1
ON
002 for Relay 2
(Factory Set)
SW2
1 1 2 2 3 3 CODE
1
4 4 5 5 6 6 9
5
2
4
7 7 8 8 9 9
6
8
0 0 3
Zimmer R 7
Internal Addresses
001 for Relay 1
ON
002 for Relay 2
(Factory Set)
SW2
1 1 2 2 3 3
Adams J 1
Bernard E 9
4 4 5 5 6 6 Brown L 5
Davis T 2
Hodges S 4
7 7 8 8 9 9
Miller J 6
Smith K 8
0 0 Thomas W 3
Zimmer R 7
2 Devices "Daisy Chain"
Internal Addresses
001 for Relay 1
ON
002 for Relay 2
Address
(Factory Set)
SW2
1 1 2 2 3 3
1
9
4 4 5 5 6 6
5
2
7 7 8 8 9 9 4
6
8
0 0 3
7
The Access Plus system does not have to be a single "Daisy Chain" wiring sequence. What
is important is that the distance restriction (4000 ft) be observed and that the devices at the
end of the chain have their termination switch turned ON and the unit's SW2 termination
switch turned OFF.
Terminated
Device
Term Sw
ON
Address
004
Terminated
End Device
Term Sw Term Sw
ON
Address Address
007 006
3 Devices "Daisy Chain"
Terminated
Internal Addresses
Device
Term Sw
OFF
ON
Address
008
1 Device
1
4
Term Sw
4 Address
008
Term Sw Term Sw
ON
Address Address
003 004
OFF
5 5
2
Terminated
Device
Term Sw
ON
Address
003
1 Device
Terminated
End Device
Term Sw Term Sw
ON
Address Address
003 OFF 004
Term Sw Term Sw Term Sw Term Sw
Address Address Address
003 OFF 004 OFF 005 OFF
6 Devices "Daisy Chain"
4000 ft Maximum (3/4 Mile)
Terminated
Internal Addresses
Device
001 for Relay 1
Term Sw
OFF
ON
002 for Relay 2
Address
(Factory Set)
SW2 W2 003
1 1 2 2 3 3
NAME CODE
Adams J 1
Bernard E 9
4 4 5 5 6 6
Brown L 5
Davis T 2
7 7 8 8 9 9 Hodges S 4
Miller J 6
Smith K 8
0 0 Thomas W 3
Zimmer R 7
Internal Addresses
Term Sw
001 for Relay 1
Term Sw
OFF
002 for Relay 2
Address
(Factory Set)
OFF 005 OFF SW2 W2
1 1 2 2 3 3 NAME CODE
Adams J 1
Bernard E 9
4 4 5 5 6 6
Brown L 5
Davis T 2
7 7 8 8 9 9 Hodges S 4
Miller J 6
Smith K 8
Thomas W 3
0 0
Zimmer R 7
2 Devices "Daisy Chain"
001 for Relay 1
Term Sw Term Sw
002 for Relay 2
Address Address
(Factory Set)
003 004
OFF OFF
1 1 2 2 3 3 NAME CODE
Adams J 1
Bernard E 9
4 4 5 5 6 6
Brown L 5
Davis T 2
7 7 8 8 9 9 Hodges S 4
Miller J 6
Smith K 8
Thomas W 3
0 0
Zimmer R 7
5 Devices "Daisy Chain"
INCORRECT Configuration
4000 ft Maximum (3/4 Mile)
Terminated
4
Internal Addresses
Device
001 for Relay 1
Term Sw Term Sw
ON ON ON ON
002 for Relay 2
Address
Address
(Factory Set)
7
007 005 SW2
1 1 2 2
4 4 5 5
7 7 8 8
6
0 0
Maximum of six (6)
devices allowed.
Any RS-485 Keypad,
Card Reader and
MicroPlus RF Receiver
sequence allowed.
A single "Daisy Chain"
wiring sequence has
the strongest signal
strength.
Terminated
End Device
Term Sw Term Sw
ON
Address Address
006 OFF 007 OFF 008
Maximum of two (2)
terminated end
devices allowed.
2 Devices
Terminated
End Device
Term Sw Term Sw
ON
Address Address
003 OFF 004
Terminated
End Device
Term Sw Term Sw Term Sw
ON
Address Address Address
005 006 007
OFF OFF
Terminated
End Device
Term Sw Term Sw
ON
Address Address
003 004
OFF
3 3 CODE
1
9
6 6
5
2
9 9 4
6
3 8
3
7
2 Devices "Daisy Chain"
1810-162-A-6-16