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Appendix C Technical data for the 7951
Page C.9
Alarm annunciation Quantity 3 (one each for Input, System or Limit alarms)
Type Red LED
Operation Flash indicates new alarm condition. Steady
indicates accepted alarm.
Options None
Security Mechanisms 1. Switch located on front panel
2. Software code
Indicator Bi-colour LED on the front panel:
1. RED: Not secured
2. GREEN: Secured
3. ORANGE: Part-secured
Options None
Power Supplies
Input 21V to 30V dc.
Unloaded: 20W maximum.
Loaded: 35W maximum.
2A worst-case start-up current
Output General instrumentation
energisation
1 x 24V nominal at 800mA
Flowmeter energisation Switchable voltages of 8V or 16V, current limited
to 120mA
DAC energisation Isolated 25V output at 200mA
Options None