Pyromation Series 642 - Manual (Page 34)

Technical data Series 642
34 Pyromation, Inc.
9.0.2 Output
Output signal Analog 4 to 20 mA, 20 to 4 mA
Signal on alarm • Underranging:
Linear drop to 3.8 mA
• Overranging:
Linear rise to 20.5 mA
• Sensor break; sensor short-circuit (not for thermocouples TC):
≤ 3.6 mA or ≥ 21.0 mA (configurable 21.6 mA to 23 mA)
Load Max. (V
power supply
- 11 V) / 0.022 A (current output)
Linearisation/transmission
behaviour Temperature linear, resistance linear, voltage linear
Filter 1 st order digital filter: 0 to 60 s
Galvanic isolation U = 2 kV AC (input/output)
Input current required
≤ 3.5 mA
Current limit ≤ 23 mA
Switch-on delay 4 s (during switch-on operation I
a
= 4 mA)
Voltage transmitter (mV) Millivolt transmitter (mV) -20 to 100 mV 5 mV
1) Increasing inaccuracy for temperatures < 300 °C (< 572 °F)
Input Designation Measuring range limits Min. span