Samsung SSA-R2010/EXP manual EARTH-GROUNDING the Communication Cables, Host PC

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installation and external connection

EARTH-GROUNDING THE COMMUNICATION CABLES

It is recommended to use a proper grounding system for the communication cables.

The best grounding method is to earth-ground the shield wire of the communication cable. However, the earth-grounding of the communication cable is not easy, and it also causes an increased installation cost. There are three grounding points available for installation:

1.Earth Ground

2.Chassis Ground

3.Power Ground

The most important thing about the earth-grounding does not lie in connecting either end of the shield wire to the grounding system; This will cause a current flow through the shield wire when the voltage level of both ends of the shield wire is not equal and this current flow will introduce some noise and interference to communications.

It is recommended to connect ONLY one end of the shield wire of the communication cable to the grounding system. If you can locate an earth-grounding point nearby, connect one end of the shield wire to that point.

If you could hardly locate an earth grounding point nearby, connect one end of the shield wire to the chassis ground point. If you could locate neither of an earth or chassis grounding point nearby, connect one end of the shield wire to the power ground point (GND).

Note that if the chassis ground is not properly connected to the earth and floated from the ground level, then grounding to the chassis ground will yield the worst communication performance. If this is the case, use the power ground point rather than the chassis ground.

RS-485/RS-232

RS-232 ConverterCommunication

Wires

Connect ShieldWire Open

HOST PC

Earth Ground

or Chasis Ground or Power Ground

 

RS-485

RS-485

RS-485

GND

GND

GND

GND

12_ installation and external connection

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Contents Biometric Reader Please visit our websiteSafety information Safety informationImportant Safety Instructions This device may not cause harmful interference,Contents Features Product introductionWHAT’S Included Cables Quick Guide CD ManualMaster Card Ferrite Cores X AT a Glance Front PanelDisplays the status of the system operation Rear Panel Pins Signal Cable Color Cable Color SchemeCable Selection Installing the Wall Mount Termination ResistorEARTH-GROUNDING the Communication Cables Host PCOverall Wiring Diagram ConnectionPower Input ConnectionController Connection of External LED controlOutput Connection Wiegand Data Output ConnectionConnecting to the External Reader External Reader ConnectionCommunication Line Connection RS-485 Communication Port Connection StandaloneRS-485 Communication Port Connection Multiple Units TCP/IP Communication Port Connection Hub Host PC RJ45 RJ45 RJ45Initializing the System Using the DIP Switch Refer to Communication Address Setup. onInitialization Master IDRegistration Mode Reader ModeDisplay and Operation Status of READER/REGISTER Communication Address Setup To REGISTER/DELETE the Master ID CardReader Mode and Authentication If the card is not registeredPresent the registered card to the reader User management Registering the IDTo Register the ID Card Along with the Fingerprint To Delete ID SuccessfullyWiegand Output Default Timing DiagramOutput format Data Type 26-bit /34-bitHOW to Register the Fingerprint Other informationTroubleshooting TroubleshootingProblem Action Problem Product Specifications Product specificationsCorrect disposal of batteries in this product
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