Omni 4000 Series Installation Manual page 172

Process Input and Output Modules Capabilities and Features
Type Input
#1
4-20 mA, 1-5 V,
A
4-20 mA, 1-5 V,
B
4-20 mA, 1-5 V,
E/D
4-20 mA, 1-5 V,
E
HT/HM
Flowmeter Pulse Inputs*
Input Frequency
Positive Going Trigger Threshold
Negative Going Trigger Threshold
Input Impedance
Configuration
Common Mode Voltage
Pulse Fidelity Check
E Module Only
* Use the DC coupling–high threshold setting.
** The maximum frequency allowed is reduced when operating with a sine wave input signal.
This is because the signal must extend beyond the high-level threshold and below the low-level
threshold for a minimum of 30μs to allow the photo-optical couplers to conduct.
Page 8-4
OMNI 4000/7000 Installation Guide – Rev H
Input #2 Input #3
4-20 mA, 1-5V,
RTD
Flow Pulses
4-20 mA,
1-5V,
RTD Flow
Pulse
Frequency Density
RTD
Flow Pulses
RTD
HART FSK Protocol
Specifications
•
DC to 15 kHz square wave
•
DC to 12 kHz sine wave**
+4.2 V ± 0.2 V (nominal @ 1 kHz)
+3.2 V ± 0.2 V (nominal @ 1 kHz)
1 MΩ (nominal @ 1kHz)
Differential input (E module inputs are single-ended
referenced to DC return)
±250 VDC to chassis ground
Channels are continuously compared for frequency and
sequence
•
Complete failure of either A or B channel will not
affect totaling
•
Simultaneous noise pulses are rejected with better
than 90% certainty
Technical Specifications
Input #4 Analog
Outputs
Two
4-20 mA
Frequency One
Density 4-20 mA
Two
4-20 mA
Two
4-20 mA
Two
4-20 mA
Level A Double
Fidelity Chronometry
Proving
No No
No No
No No
Yes Yes
No No