Installation manual

M1G Installation and Programming
Page 12
Data Bus E.O.L. Termination - VERY IMPORTANT!
The M1 data bus comforms to EIA RS-485 standards and operates at 38,400 bits per second. The RS-485 standard stipulates there be no
more than 2 home run data bus cables attached to the M1 Main Data terminals, with the end of each cable terminated by a 120 Ohm resistor
connected across the data wires. The M1 board and bus devices come with built-in terminating resistors that may be activated via 2 pin
jumpers (2 Gold Pins). Placing a shorting cap (included in hardware pack) on the two gold pins activates the 120 Ohm terminating resistor
across Data Lines A & B. These jumpers are marked JP2 on the keypads and JP1 on the expanders. From the factory, no terminating
resistors are installed. Without proper termination, noise and interference can cause data corruption and missed communications.
BLACK
WHITE
GREEN
NOTE: RS-485 Data Bus Max. wire length is 4000 ft. Total
length of 2 homeruns must not exceed that distance.
RED
Jumper
Terminate
these two
devices.
DO NOT Jumper
Terminate these devices.
Keypad 1
Data Bus Devices
e.g. Keypads, Expanders
Keypad 3
Diagram of Two (2) Home Run Cables with Devices Daisy Chained along the Data Bus
+VKP
DATA B
DATA A
NEG
RS-485 DATA BUS
The last device on each home run cable SHOULD be terminated via the gold 2 pin terminating header/jumper. Placing a shorting cap on the pins will engage a 120 Ohm
resistor across data lines A & B. If there is only 1 data bus home run cable then place shorting cap on JP3 of Main Board. See other hookups below.
Min. wire gauge: 24 AWG
18 to 22 AWG is best for
long distances.
Install Teminating
Jumper on this last
device AND on the
control JP3.
6 conductor cable
DATA
A1 A
B1 B
DATA
A1 A
B1 B
Optional Output and Zone Input - See Keypad Instructions
Connect each device to the 6 conductor cable as shown above
OPTION B - Using 6 Conductor Cables and Series Splices to Daisy Chain Connection of Data Bus Devices
Keypad
RS-485 DATA BUS
+VKP
DATA B
DATA A
NEG
Keypad
RED
GREEN
BLACK
WHITE
To 12VDC
To 12VDC
BLUE
BROWN
6 Wire
Cable
Keypad
RED +12
+
BLACK (-)
-
GREEN
WHITE
A
A1
B
B1
TO CONTROL
NOTE: RS-485 Data Bus Max. wire distance is 4000' total. Each homerun 6 conductor
cable must be calculated as double the running distance since the Data A & B lines
travel out and then back (A1 & B1) where they are used to feed the next homerun.
Another option for wiring multiple home runs is to use 6 conductor cabling. This allows devices to be daisy chained using an out and back configuration. This involves a 3
way splice of the data A (Green)wire to 2 wires of the 6 conductor cable (designated A and A1). Same is done for data B (White) wire. At the control wires A1 and B1 get
spliced to the A and B wires feeding the next device. Terminate the last wired device and the control JP3 ONLY! The POS (+) and Neg (-) power wires should be parallel
wired to the +VKP and Neg terminals or to an auxiliary Power Supply if the combined current draw exceeds the rated current available from the Control.
Min. wire gauge: 24 AWG
18 to 22 AWG is best for
long distances.
ELK-M1DBH Data Bus Hub †
Mount M1DBH inside control.
Use 4 conductor cable to connect
to the M1 Data Bus terminals.
J2
J4 J6 J8
J1
J3 J5 J7 J9
RJ45 Terminating Plug Insert in first unused jack and terminate the control
at JP3. DO NOT TERMINATE AT ANY OF THE DEVICES!
CAT5 Cables
OPTION A - Using an optional ELK-M1DBH and CAT5 Cables to Daisy Chain Devices
RS-485 DATA BUS
Keypad
Refer to Keypad Instructions
for more info about Output and Zone Input
+
-
A
A1
B
B1
TO CONTROL
8 - Brown
7 - Wht/Brn
6 - Orange
5 - Wht/Blue
4 - Blue
3 - Wht/Org
2 - Green
1 - Wht/Grn
Pin1
RJ45 Plug
Blue pair is
unused
COLOR CODE EIA 568A for CAT5/6 Data Bus Cable to RJ45 Plugs.
Pin1
Front
view
Optional programmable Zone Input
Optional programmable Output
-
+
N.C.
N.O.
2200
Ohm
EOL
To BLACK (Neg)
To BLACK (Neg)
Wht/Blue
Brown
Wht/Brn
Orange
Wht/Org
Green
Blue Wht/Grn
RED +12V
BLACK (-)
GREEN
WHITE
BROWN
BLUE
Keypad
CAT5
or
CAT6
Cable
To
Black (-)
Load (50mA max)
I.E. LED, Relay
+ VKP
DATA A
DATA B
NEG
NOTE: RS-485 Data Bus Max. wire length is 4000 ft. Total. Each CAT5 homerun from
the M1DBH must be calculated as double the running distance since the Data A & B
lines travel out and then back (A1 & B1) where they are used to feed the next homerun.
Keypad
The ELK-M1DBH † Data Bus Hub is great for new installations where it is possible run multiple CAT5 homerun cables. The RJ45
jacks allow neat and organized connections and a third wire pair is used to return the DATA lines back from each device where they
are used to feed the next adjacent jack. The M1DBH circuitry daisy chains the devices by series connecting the DATA lines A & B.
Termination is accomplished with a plug-in RJ45 terminator (supplied).
Min. wire gauge: 24 AWG
18 to 22 AWG is best for
long distances.
† Not evaluated by UL †† Not for use in UL Listed Systems
A
+
B
-
DATA BUS TERMINALS
AUXILIARY POWER
SUPPLY
+
-
RED GREEN WHITE
BLACK
RED
BLACK
GREEN
WHITE
††† An Auxiliary Power Supply will be required if the control's Aux. power load for all
combined loads exceeds 1A. (450 mA for UL Commercial). Connect as shown below.
Be sure to connect the negative (-) terminal of the power supply to the negative (-)
terminal (Data Bus NEG) on the control.
U
L Use a UL Listed, battery backed-up Power Supply for UL installations. The battery
will be supplying power to the Keypads/Expanders during a power outage. The Power
Supply and backup Battery should be sized to supply the Keypads/Expanders with the UL
required minimum standby time.
To Keypads or Expanders To Keypads or Expanders
WARNING! Do not splice or interconnect the M1 Data Bus using Telephone type 66 or 110 punch down blocks.
The RS-485 Data Bus must NEVER have more than 2 terminating resistors header/jumpers installed.