PO Box 100 • Hildebran, NC 28637 USA • 828-397-4200 Voice • 828-397-4415 Fax
http://www.elkproducts.com • email: info@elkproducts.com
Data Bus Hub Retrofit
ELK-M1DBHR
APPLICATION:
The ELK-M1DBHR is an "active" RS-485 data bus hub designed for jobs where an M1 Control is retrofitting 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 or Specifications subject to change without notice.
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
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 first 2-hole pattern.
Place the slotted edge of a board glide under this screw, making sure that the half-moon tab fits 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 fit.
Wiring Connections
1. Turn Control Panel Master Power Switch Off.
2. Use a 4 wire cable to connect the Controls' Data Bus terVKP, Data A, Data B, and Neg from Control to ter, 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.
