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S C M 9 B - D 1 9 2
USERS MANUAL

R E V I S E D :  

07-26-18

Dataforth Corporation

3331 E. Hemisphere Loop

T u c s o n ,   A Z   8 5 7 0 6

The information in this publication has been carefully checked  and  is

 

believed  to  be  accurate;  however,  no  responsibility  is  assumed  for

 

possible  inaccuracies or  omissions.  Applications  information  in  this

 

manual is intended as suggestions for possible use of the products and

 

not as explicit performance in a specific application. Specifications may be

 

subject to change without notice.

Summary of Contents for SCM9B-D192 Series

Page 1: ... been carefully checked and is believed to be accurate however no responsibility is assumed for possible inaccuracies or omissions Applications information in this manual is intended as suggestions for possible use of the products and not as explicit performance in a specific application Specifications may be subject to change without notice ...

Page 2: ...TAFORTH assumes no liability expressed or implied beyond its obligation to replace any component involved Such warranty is in lieu of all other warranties expressed or implied RETURNS When returning products for any reason contact the factory and request a Return Authorization Number and shipping instructions Write the Return Authorization Number on the outside of the shipping box DATAFORTH strong...

Page 3: ...ths up to 4 000 feet and baud rates up to 115K baud using one twisted pair of wires The SCM9B D192 is an RS 485 repeater Repeaters are required to extend communications bus lengths or allow more than 32 RS 485 devices to be connected to a communications bus A repeater simply re amplifies or boosts existing RS 485 signals transmitted over long distances The SCM9B D192 is isolated between input and ...

Page 4: ...ative humidity 0 95 noncondensing Warranty 3 years on workmanship and materials Power Specifications Power requirements Regulated 5Vdc Power consumption 1 0W Max RS 485 driver on MECHANICALS AND DIMENSIONS Case ABS case with screw terminal barrier plug supplied RS 485 Connectors Phoenix screw terminal barrier plug supplied Replace with Phoenix MSTB 2 5 4 ST 5 08 or equivalent Warranty 3 years on w...

Page 5: ...nput data lines will be re amplified and retransmitted on the RS 485 OUT data lines Figure 1 Connections for SCM9B D192 BAUD RATE The SCM9B D192 contains a 10 position DIP switch located on the bottom of each unit The DIP switch is used to select the correct communications baud rate and must be set to the same value as the devices connected to the RS 485 data lines Each position on the DIP switch ...

Page 6: ...interface any equipment on an RS 485 network These resistors are jumper selectable making it easier to interface the SCM9B D192 to other pieces of equipment that may or may not contain the biasing and or termination resistors RS 485 TERMINATION BIASING SETTINGS Proper termination and biasing of any RS 485 based system can be performed by properly enabling the correct resistors inside each SCM9B D1...

Page 7: ...each row of pins The jumper designators are 1K 220 and 1K To enable any resistor place a jumper over the pins next to the required designator The factory switch and jumper settings are outlined below SCM9B D192 Baud Rate 300 baud switch up RS 485 J3 Biasing Resistors 1K 1K jumpers installed Termination Resistor 220 jumper installed Isolated RS 485 J2 Biasing Resistors 1K 1K jumpers installed Termi...

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