Emerson Micro Motion Transmitters and Discrete Controllers Series 3000 Uživatelský manuál stáhnout pdf (Strana 7)

Micro Motion

Series 3000 Transmitters and Controllers 7

Output signals

Non-intrinsically safe output signals

Two active

4–20 mA outputs

Isolated to ±50 VDC from all other outputs and earth ground

Maximum load limit of 1000 ohms

Output is linear with process from 3.8 to 20.5 mA per NAMUR NE43 (February 2003).

Three discrete outputs Configurable for the application

Polarity Active high or active low, software selectable

Power Internal pull-up to 24 V

Voltage 24 VDC nominal

Current Sourcing at 5.6 mA when V

out

= 3 VDC

Sinking up to 500 mA at 30 VDC maximum

One 2-wire

frequency/pulse output

Scalable to 10,000 Hz

Output is linear with flow rate to 12,500 Hz

Pulse width 50% duty cycle above the crossover frequency

(1)

(1) The crossover frequency depends on the configured value of the pulse width. At the minimum pulse width value of 0.543 ms, the

crossover frequency is 922 Hz. At the maximum pulse width value of 277 ms, the crossover frequency is 1.8 Hz.

Configurable between 0.543 ms and 277 ms

Polarity Active high or active low, software selectable

Power Active or passive, software selectable

Voltage 24 VDC nominal, active

30 VDC applied maximum, passive

Current Sourcing at 10 mA at 3 VDC, active

Sinking at 500 mA, active or passive

Fault actions

When a fault is detected, outputs go to configured states. User can select upscale, downscale, internal zero, or none. Milliamp

outputs conform to NAMUR NE43 (February 2003).

Upscale Milliamp 21 to 24 mA, user configurable

Frequency 15,000 Hz

Downscale Milliamp 1 to 3.6 mA, user configurable

Frequency 0 Hz

Internal zero Drives the mA and frequency outputs for process variables to zero values

None Ignores fault conditions

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Emerson Micro Motion Transmitters and Discrete Controllers Series 3000 Uživatelský manuál Strana 7