Configuration and Use Manual 247
Specifications – Model 3300 and Model 3500
Diagnostics and Troubleshooting Specifications – Model 3350/3700Specifications – Model 3300/3500Measurement Performance
Discrete inputs
Two discrete, momentary inputs
• Pulse width: 0.15 sec minimum
• Voltage: 0–0.8 VDC low state, 3–30 VDC high state, dry contacts
A.6.3 Non-intrinsically safe output signals
Milliamp outputs
Two active 4–20 mA outputs
• Isolated to ±50 VDC from all other outputs and earth ground
• Maximum load limit: 1000 Ω
• Output is linear with process from 3.8 to 20.5 mA, per NAMUR NE43 (June 1994)
Discrete outputs
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 VCD, sinking up to 500 mA at 30 VDC maximum
Frequency/pulse output
One 2-wire frequency/pulse output
• Output is linear with flow rate to 12,500 Hz
• Configurable unit of measure
• Scalable to 10000 Hz
• Pulse width: 50% duty cycle above 500 Hz, configurable for frequencies below 500 Hz
• Power: Active or passive, software selectable
• Polarity: Active high or active low, software selectable
• Voltage: 24 VDC nominal, active; 30 VDC applied maximum, passive
• Current: Sourcing, 10 mA at 3 VDC, active; sinking, 500 mA, active or passive
Fault output
When a fault is detected, outputs go to configured states. User can select high, low, last measured
value, or internal zero. Milliamp outputs conform to NAMUR NE43 (June 1994).
• High output limits can be configured from 21 to 24 mA for milliamp; 15,000 Hz for frequency
• Low output limits can be configured from 1 to 3.6 mA for milliamp; 0 Hz for frequency
• Last measured value is the last output for the process variable
• Internal zero drives the milliamp and frequency outputs for process variables to zero values
