A digital input Characterization Module (CHARM) for NAMUR Sensors.
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DeltaV™ DI NAMUR CHARM
DeltaV™ DI NAMUR CHARM
Specs
Sensor Types
NAMUR Sensors, Dry Contacts, Dry contact with end of line resistance
Detection Level for On
> 2.1 mA (<4 kΩ)
Detection Level for Off
< 1.2 mA (>9 kΩ)
Channel Impedance
1.5 kΩ (approximate)
Wetting Voltage
12 Volts (± 5%)
Field Circuit Protection
8 mA Current Limiting Circuit, Field wiring disconnect
CHARM Power Req.
28 mA max @ 24 V DC
CHARM Heat Dissipation
0.51 W
Fault Detection Capable
Guaranteed short circuit: <100 Ω, Guaranteed good status: 400 Ω to 40 kΩ, Guaranteed open circuit: > 75 kΩ
Configurable Channel Types
Discrete Input - Dry contact or discrete state sensor changing <2 Hz, Pulse Count - Pulse train 0.1 Hz to 10 KHz, 50 µsec min pulse width
Resources
Features
- Eliminate marshalling and add I/O anywhere in the plant without affecting control room cabinets
- No marshalling cabinet or cross-wiring, fewer wires, much less work and fewer contact points for potential failures
- No marshalling cabinet or cross-wiring, fewer wires, much less work and fewer contact points for potential failures