Harrington-signal HS-3200 - Install Manual Manual de usuario descargar pdf (Pagina 12)

HS-3100/3200 Installation Manual

Testing Circuit Supervision

Use the following procedures in the table below to confirm that SLCs and NACs are supervising for

opens, shorts, and grounds. The right column in this table shows the LEDs that illuminate when an

open, short, or ground occurs on a specific circuit. AUX is supervised for shorts and earths only.

Open (NACs) -- Remove the end-of-line

and make circuit impedance infinite.

Open (SLCs) -- Break the line anywhere in

the loop.

NAC illuminates the Trouble LED and the

NAC Trouble LED flashes

SLC illuminates the Trouble LED

Short -- Apply a zero ohm jumper across

the circuit.

SLC illuminates the Trouble LED

NAC illuminates the Trouble LED and the

NAC Trouble LED flashes

AUX illuminates the Trouble LED

Earth Ground (NACs) -- Place a 10KΩ or

smaller value resistor from the supervised

wiring to Earth Ground.

Earth Ground (SLCs) -- Place a 100Ω or

smaller value resistor from the supervised

wiring to Earth Ground.

If an Earth Ground occurs on any circuit the

Fault and Trouble LEDs both illuminate

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 31 32

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Harrington-signal HS-3200 - Install Manual Manual de usuario Pagina 12