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Product Information / Produktinformation
A6312
Rotational Speed Monitor
1.6.5 Power supply
The system supply voltages with their grounds, the signal inputs and supervision inputs /
outputs are galvanically isolated from each other.
Supply voltage inputs
Two redundant, diode decoupled inputs for nominal
+24 V with common 0 V reference
Voltage input UB+ / UN+
d2 / z2
Common reference 0 V U
−
b2
Permissible voltage range
19 ... 31.2Vdc (IEC 654
−
2 class DC 4)
CSA: 24Vdc; SELV LPS
Power consumption
Max. 6 W, at 24 V max. 250 mA
The monitor system voltages, and thus the 0 V / common connections for the measurement
and monitoring inputs and outputs, are galvanically separated.
Monitor system voltage
The module system voltages required for the internal supply are permanently checked on low
voltage. If ”Low voltage” is detected, an error message will be given.
Sensor supply
For both channels of the module
Separation
Decoupled and galvanically separated from the
supply voltage,
can be operated in parallel with other monitors, open
circuit and short circuit proof, non
−
reactive
Sensor supply channel 1
Sup.Ch1+ / Sup.Ch1
−
b6/z6
Sensor supply channel 2
Sup.Ch2+ / Sup.Ch2
−
b8/d6
Supply voltage
26,75 V DC; Tolerance
±
2
%
Residual ripple
< 20 mVss (at nominal current 20 mA)
Max. current
35 mA
Max. short
−
circuit current
0 mA
≤
I short
−
circuit
≤
5 mA;
Open
−
circuit and short
−
circuit proof
