Page 1
Data Bus Hub Retrot
ELK-M1DBHR
APPLICATION:
The ELK-M1DBHR is an "active" RS-485 data bus hub designed for jobs where an M1 Control is retrotting an older panel that has multiple
homerun 4 conductor keypad/data wires. It splits the main 485 data bus into 4 managed 485 branches. Each branch can have 2 parallel
home run cables for a total of 8 home runs. The end of each cable is EOL terminated to insure proper operation and supervision.
FEATURES:
• Splits The Controls' RS-485 Data Bus Output Into 4
Managed Branches
• Each Managed Branch Can Have 2 Parallel Home Run
Cables (Total Of 8 Home Runs)
• EOL Termination Of Each Branch Insures Proper
Operation And Supervision
• Works With Std. 4 Conductor Home Run Wire
• Includes Mounting Rails for ELK-SWB Boxes
Features or Specications subject to change without notice.
SPECIFICATIONS:
• Inputs: Elevator Screw Terminals, 4 Position
• Output: Elevator Screw Terminals, 4 Position
• Current Draw: 30mA nominal PLUS 20mA per RS485 active
branch driver. Total combined with all 4 branches active
would be ~110mA.
Note: This is in addition to the power requirements of any
connected data bus devices (keypads, expanders, etc.)
• Circuit Board Dimensions: 4.9" x 2.75"
Installation
1. The M1DBHR can be mounted inside the M1 enclosure on the left or right hand side of the M1 board using
the supplied ELK-SWG Circuit Board Glides. If all the mounting locations are consumed, an additional
ELK-SWB14 or ELK-SWB28 enclosure may be installed.
The ELK-SWG Circuit Board Glides attach to the enclosure at strategically placed 2-hole punch patterns.
Note that one hole in each pattern is slightly larger than the other. The small hole is for a 6/32 type “F”
mounting screw and the large hole is for a half-moon shape locator tab on the bottom of each glide.
2. Starting at the top, loosely start a 6/32” mounting screw in the small hole of the rst 2-hole pattern.
Place the slotted edge of a board glide under this screw, making sure that the half-moon tab ts into the
larger hole and the grooved edge is facing down. Tighten the screw using a long shafted screwdriver.
Install a second board glide in the 2-hole pattern 4" below. Attach the second board glide using the
same procedures. The grooved edge of this glide should face up.
3. Slide the M1DBHR board into the grooves provided by the glides. The circuit board should slide freely.
If loose or too tight, simply loosen one of the mounting screws and adjust the glide to assure a good t.
Wiring Connections
1. Turn Control Panel Master Power Switch O.
2. Use a 4 wire cable to connect the Controls' Data Bus terminals +VKP, Data A, Data B, and Neg from Control to terminals +, A, B, and on the M1DBHR. NOTE: If existing wires are already attached to the Data Bus terminals, remove them and follow the detailed wiring
diagram on the next page. One of the main purposes of the M1DBHR is to connect and distribute most devices and homeruns
through it, as opposed to directly to the main control board.
3. Make all connections as per the diagram on the next page.
4. Power up the Control.
REMEMBER: Any data bus devices that are added to the Control MUST have the address switches properly set and they must be enrolled
using the Bus Module Enrollment process under the Installer Level Programming.
PO Box 100 • Hildebran, NC 28637 USA • 828-397-4200 Voice • 828-397-4415 Fax
http://www.elkproducts.com • email: info@elkproducts.com
Page 2
The ELK-M1DBHR † Data Bus Hub Retrofit is intended for retrofit jobs where existing 4 conductor cables are the only wires available. It creates 4
managed RS-485 BRANCHES from the single M1 main RS-485 Bus. Like the main M1 Bus, each branch can only have 2 home run cables (4
branches x 2 ea. = 8
home runs).
DO NOT connect more than two (2) M1DBHR Hubs to a single M1 Control.
DO NOT connect an M1DBHR on a branch of another M1DBHR! The M1DBHR CANNOT be used as an extender or remote repeater.
DO NOT remote M1DBHR(s) away from the M1. Mount within main M1 Control. Terminate last (end line) device on each home run.
M1 Control Board
RS-485 DATA BUS
+VKP
DATA A
DATA B
NEG
NEG -
DATA B
DATA A
+12V
J1J2
DATA BUS
JP3 Teminating Jumper
+VKP is protected with
1.25A PTC
RED
GREEN
WHITE
BLACK
Jumper Terminate
JP3 on Control and
JP1 on M1DBHR.
Mount inside main M1 Control and connect to
Data Bus terminals using short 4 conductor cable.
Jumper Terminate
this device AND
JP2 on the
Jumper
Terminate
these two
devices.
M1DBHR.
Keypad
Terminate
these two
Jumper
devices.
Keypad
Keypad
Branch 1 Example:
1 Homerun with 1 Keypad
Place terminating jumper on the Keypad/
Bus Device AND on JP2 of the M1DBHR.
Branch 2 Example:
2 Homeruns with 1 Keypad on each
Place terminating jumper on BOTH Keypads and
remove jumper JP3 on M1DBHR.
Branch 3 Example:
2 Homeruns with 2 Keypads & 1 Expanders on
first, and 1 Keypad and 1 Expander on second.
(Devices must be Daisy chain wired on each
homerun so they appear in series.)
Place terminating jumper on
the LAST device connected to
each homerun and remove
jumper JP4 on M1DBHR
.
ELK-M1DBHR †
DATA BUS HUB FOR RETROFIT
+
FROM CONTROL
A
INPUT
B
-
DATA BUS
BRANCH 1
A
B
+
RED
GREEN
WHITE
BLACK
DO NOT Jumper Terminate
these devices.
Keypad
Keypad
-
DO NOT Jumper JP3.
JP1
JP2 JP3
DATA BUS
BRANCH 2
A
B
+
RED
WHITE
GREEN
Keypad
Terminating Jumpers (JP1 - JP5)
JP1 = Terminates Input from Control
JP2 = Terminates Branch 1
JP3 = Terminates Branch 2
JP4 = Terminates Branch 3
JP5 = Terminates Branch 4
See details about Data Bus Termination.
JP4
DATA BUS
BRANCH 3
A
B
+
-
RED
WHITE
BLACK
GREEN
DATA BUS
BRANCH 4
+
-
BLACK
RED
DO NOT Jumper JP4.
JP5
ELK PRODUCTS, INC. HILDEBRAN, N.C., 28637, USA
A
B
-
BLACK
WHITE
GREEN
Branch 4 Example:
1 Homerun with 2 Keypads & 1 Expander
(Devices must be Daisy chain wired)
Place terminating jumper on the
LAST device and JP5 on 1DBHR
The above examples are intended to show the flexibility provided by the 4 data bus branches of an M1DBHR.
The number and types of devices used on each branch is up to the Installer.
All bus devices (keypad, expanders, etc.) have terminating jumpers. Placing a shorting header on the jumper engages a 120 Ohm
resistor across data A & B lines. Refer to the individual instruction manuals and Control hardware pack for shorting headers.
Jumper Terminate
.
these this device.
END-OF-LINE DATA BUS TERMINATION IS VERY IMPORTANT !
Keypad
ELK-M1KP
DO NOT Jumper Terminate
these devices.
Keypad
If using 1 M1DBHR place jumper on JP1 of the M1DBHR and JP3 of the M1 Control.
With 2 M1DBHR boards place jumper on JP1 of both M1DBHR boards and remove jumper JP3 on the M1 Control.
DO NOT EXCEED two (2) terminating jumpers on any of the 4 branches of the M1DBHR or the main M1 bus.
Like the Main M1 Bus, the Maximum wire length of any of the 4 branches on the M1DBHR is 4000 ft.
Min. wire gauge: 24 AWG 18 to 22 AWG is best for long distances.
M1 Control Board
RS-485 DATA BUS
+VKP
DATA A
DATA B
NEG
NEG -
DATA B
DATA A
+12V
J1J2
DATA BUS
JP3 Teminating Jumper
NOTE: As additional data bus devices are added to the
Control the total calculated current draw must be
considered. If total current draw exceeds the limits of the
control, add an auxiliary 12 VDC Power Supply.
GREEN
WHITE
BLACK
Do Not Connect +VKP to the
M1DBHR if it is being powered from
an Aux. Power Supply.
12 VDC
Aux.
Power
Supply
+
-
+
-
RED
BLACK
AC
XFMR
+
-
12V Battery
ELK-M1DBHR
DATA BUS HUB
FOR RETROFIT
FROM CONTROL
A
INPUT
B
Connect all Negatives (-) together to
form a "common" negative path.
JP1
Loading...