DeltaV™ AO 4-20 mA HART CHARM

An analog output Characterization Module (CHARM) for a 4-20 mA, with or without HART, output.

Specs

Sensor Types

4 to 20 mA with or without HART, 0 to 20 mA

Nominal Signal Range (span)

4 to 20 mA, (0 to 20 mA option)

Full Signal Range

0 to 24 mA

Accuracy over temperature range

0.25% of span (0 to 60°C), 0.5% of span (-40 to 70°C)

Resolution

16 bit D/A converter

Calibration

None Required

Avaliable Field Power

20 mA at 15 V DC supply into 750 Ω load

Field Circuit Protection

24 mA Current Limiting Circuit, Field wiring disconnect

CHARM Power req.

42 mA max @ 24 V DC

CHARM Heat Dissipation

0.48 W

HART Support

HART v7 pass-through for AMS, HART v7 variable and device status available to control

HART Data Update Rates

Update rates are faster than every second dependent on HART communication loading and device type

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