Emerson Micro-Motion 2400S, Configuration And Use Manual, Page: 62 / 198

54 Micro Motion
®
Model 2400S Transmitters with Analog Outputs
Required Transmitter Configuration
6.7.2 Assignment
The discrete output can be used to report the conditions described in Table 6-18.
Flow switch
Flow switch refers to the flow rate moving past a user-configured setpoint, in either direction. For
example, if the setpoint is 100 lb/min, a flow switch occurs if the flow rate changes from 101 lb/min
to 99 lb/min, or from 99 lb/min to 101 lb/min.
Table 6-17 Discrete output polarity
Polarity Output power supply Description
Active high Internal • When asserted (condition tied to DO is true), the circuit provides
a pull-up to 24 V.
• When not asserted (condition tied to DO is false), the circuit
provides 0 V.
External • When asserted (condition tied to DO is true), the circuit provides
a pull-up to a site-specific voltage, maximum 30 V.
• When not asserted (condition tied to DO is false), the circuit
provides 0 V.
Active low Internal • When asserted (condition tied to DO is true), the circuit provides
0 V.
• When not asserted (condition tied to DO is false), the circuit
provides a pull-up to 24 V.
External • When asserted (condition tied to DO is true), the circuit provides
0 V.
• When not asserted (condition tied to DO is false), the circuit
provides a pull-up to a site-specific voltage, to a maximum of
30 V.
Table 6-18 Discrete output assignments and output levels
Assignment ProLink II code
Communicator
code Display
code
Condition
Discrete
output level
(1)
(1) Voltage descriptions in this column assume that Polarity is set to Active High. If Polarity is set to Active Low, the voltages are
reversed.
Discrete events 1 – 5
(see Section 8.7) Discrete Event x Discrete Event x EVNT x ON Site-specific
OFF 0 V
Flow switch Flow Switch
Indication Flow Switch FL SW ON Site-specific
OFF 0 V
Flow direction Forward/Reverse
Indication Forward/Reverse FLDIR Forward 0 V
Reverse Site-specific
Calibration in progress Cal in Progress Calibration in
progress ZERO ON Site-specific
OFF 0 V
Fault
(2)
(2) Voltage descriptions for Fault assume that the fault indicator is set to Upscale. See Section 6.7.3 for more information.
Fault Condition
Indication Fault FAULT ON Site-specific
OFF 0 V
Meter verification fault
(3)
(3) Requires Smart Meter Verification.
Meter Verification
Fault Not available Not available ON Site-specific
OFF 0 V