Electrical Connections; Electrical Connections; Optical Units; Wiring Diagram - B-I Inductrial BI-SM2004 Manual

B-I INDUSTRIAL CO., LTD.
SMOKE DENSITY INDICATOR
CHAPTER 4

4-1 Electrical Connections

4-1-1 Optical Units

Use instrumentation grade shielded cables for connection to the projector, receiver and
control unit. Run the cables separately from any mains cable (300 mm minimum separation).
Cable shields to be grounded only at control unit.
Maximum cable length is governed by the total loop resistance of the core and should not
exceed the following limits:
Projector: 5 Ohms
Receiver: 25 Ohms
4-20mA Analogue Output: 25 Ohms

Wiring Diagram

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