Omega DPF20 Series User Manual

25
DPF20 Frequency, rate, total or period counter Instruction Manual
Opon AO
Output type analog output
Output signals 4/20 mA acve
4/20 mA passive
0/10 Vdc
Max. signal output 22 mA, 10.5 Vdc
Min. signal output 0 mA, -50 mVdc
Scaling related to the instruments reading
direct or inverse slope
Vexc (terminal A) +13.8 Vdc ± 0.4 Vdc (max. 25 mA)
protected against short circuit
Load impedances ≤350 Ohms (in 4/20 mA acve)
≤800 Ohms (in 4/20 mA passive) (with a
24 Vdc external Vexc) (maximum 27 Vdc
between terminals ‘B’ and ‘C’)
≥10 KOhms (in 0/10 Vdc)
Accuracy (at 25 ºC) <0.1 % FS
Thermal stability 60 ppm/ºC in mA mode
50 ppm/ºC in Vdc mode
Step response <75 mSeconds + meter step response
(0% to 99% signal)
Isolaon 1000 Vdc
Warm-up 15 minutes
Type of terminal plug-in screw terminal
pitch 5.08 mm
Installaon allowed at ‘Opt.1’, ‘Opt.2’, ‘Opt.3’
Rear view DPF20
Power
Opt.2
Opt.1
Opt.3
A B C
A B C
Signal
A B C
MV MV
MV
Module AO provides 1 analog output congurable as 4/20 mA or
0/10 Vdc, to install in DPF20 digital panel meters.
Conguraon is performed from the frontal keypad of the meter, by
seng the parameters at the opons conguraon menu (‘Opt.1’,
‘Opt.2’ or ‘Opt.3’ depending on the posion the module is installed).
The output signal is proporonal to the instrument reading, and it
can be fully scaled with direct (posive) or inverted (negave) slopes.
The mA output can be congured as an acve loop (the instrument
provides the excitaon for the loop ) or as a passive loop (the loop is
externally powered).
Up to a maximum of 3 analog output modules can be installed in a
single instrument, all outputs isolated between them and isolated
from all other circuits.
Modules AO can be ordered pre-installed into a DPF20 digital panel
meter, or standalone for delayed installaon, as they do not require
soldering or special conguraon.
Module Connecons
Module AO - Analog output
Terminal A Vexc
Terminal B Signal (mA or Vdc)
Terminal C GND
Jumper M closed for ‘mA’
Jumper V closed for ‘Vdc’
Table 8 - Connecon terminals
Output 4/20 mA acve
The current loop is pow-
ered from the ‘AO’ mod-
ule
Jumper ‘M’
closed
Signal
Vexc.
A B C
M V
Output 4/20 mA passive
The current loop is pow-
ered from an external
equipment
Signal-
Signal+
Jumper ‘M’
closed
A B C
M V
Output 0/10 Vdc
Jumper ‘V’
closed
Com.
Signal
A B C
M V
Table 9 - Connecons for each output mode
2.2 Module AO

Omega DPF20 Series Specifications

General

Brand	Omega
Model	DPF20 Series
Category	Measuring Instruments
Language	English