Lenel OnGuard Hardware Installation Manual page 39

Hardware Installation Guide
RS-485 Multi-drop Wiring and EOL Termination: ISC and LNL-500B
RS-485 Multi-drop Wiring and EOL Termination
ISC and Biometric Gateway Mid RS-485
ISC
T
= On Board Termination
T+ T- SG
= Indicates RS-485 in and out
or less than 10 foot drop
Shield
Earth Ground, one point only
per ISC
T+ T- SG
T+ T- SG T+ T- SG
T
T
Biometric Reader
Dual Reader Dual Reader
Gateway
Interface Interface
T+ T- SG
Downstream ports
2 & 3 typical
T+ T- SG T+ T- SG T+ T- SG
Biometric Reader Biometric Reader Biometric Reader
Enclosure Ground Enclosure Ground Enclosure Ground
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revision 7 —