III.2.4.4 I
2
t - monitoring
When the preset effective (r.m.s.) current limit is reached, the pulse current is limited until the
effective loading falls.
This does not affect the BTB (system ready) signalling.
III.2.4.5 Indicators
Red and green LEDs for system-ready (BTB) and combined fault [FAULT]
The green LED lights up when the DC-link voltage is present and the auxiliary voltage
supply (±15V) is functioning properly. The transistor controller is ready to operate when the
green LED lights up and the red LED does not light up.
The BTB contact (floating n.o. (make) contact 100V / 0.1A , pins 8bd or terminals 8,9) is
closed when the transistor controller is ready to operate.
The red LED lights up on
¾ overcurrent (short-circuit / earth short)
¾ overvoltage (excessive peak ballast power)
¾ undervoltage of the aux. supply (< 18V)
¾ overheating of the heat sink (> 90°C)
Page III - 6 Functions and Options Chapter III
Series 04S 12.99 Kollmorgen
In all cases, the BTB- signal is interrupted if a red LED lights up (fault signal
-
ling).
You can reset the signal, after the fault has been cleared, by switching the
mains supply (or the 24V aux. supply) off and on again.
See Chapter V.2 for the layout of the LEDs.
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