Vt1900, Vr1900, Rs485 2-wire – Interlogix VR1900 Series User Manual

Page 4: Rs485 4-wire, Not used

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VT1900

A Power

A

LED illuminates

A

B

VR1900

B

A Carrier Detect

Power

LED illuminates

1

2

1

2 3

1

2

RS232

ON

RS422

1

2

1

2

RS485

2-WIRE

1

2

RS485

4-WIRE

1

2

NOT USED

NOTE: WITHOUT PROPER FIBER CONNECTION, LED's DO NOT INDICATE
CORRECT OPERATIONAL STATUS OF THE UNIT.

This manual is related to the following products:

VT1900 Series