6 2231V104-UK
TRIP AMPLIFIER 2231
• AC/DC trip amplifier
• 2 adjustable alarm limits
• Galvanically isolated 3.75 kVAC
• Front programmable
• 3-digit LED display
• 24 VDC or universal supply
Applications
Alarm detector in connection with measurement of AC/DC current or voltage
signals. The unit is used where accurate setpoint setting and different alarm
functions are required.
The unit can be used as a single or dual trip amplifier.
Alarm detector can be installed in PELV and SELV circuits.
Technical characteristics
General
The unit is microprocessor-based, which allows a very accurate setting of process
parameters. Each unit is supplied with basic calibration data, which eliminate the
tolerances in the component data. This means that the input can be programmed
to the requested signal range without re-adjustment.
Measurement ranges less than the min. measurement range of 0.5 V down to 10
mV may be entered, though this will affect the resolution and the response time.
Please note that the electric specifications of the device are only kept as long
as the stated min. measurement ranges and max. zero offsets are not exceeded.
Input
Standard DC current signals in the range 0...20 mA.
The current signal is detected by a 50 Ω shunt, which is manually connected
through an internal jumper.
DC voltage signals in the range 0...250 VDC.
By measurement of AC current signals up to 1 A from a current transformer or
current clamp a 1 Ω / 2 W input shunt is used.
True RMS measurement of AC voltage signals in the range 0...250 VRMS, with a
crest factor < 5.
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