AW Gear Meters RT-Ex15-Ex - Manual (Page 6)

AW-Lake Company 8809 Industrial Drive, Franksville, WI 53126  web: www.awgearmeters.com
 Tel: 262-884-9800  Fax: 262-884-9810  Email: [email protected]
RT-Ex15-Ex manual rev 6.13.11.docx Revision 3.3.10
6
Analog Output
The isolated 16-bit 4-20mA output can be wired in a 2-wire loop-powered arrangement or loop
power can be supplied via the DC supply as shown in the wiring examples below. The mA LED
will light with varying intensity in proportion to the mA output for troubleshooting purposes.
The assignment, offset, and scaling values for the mA output are programmable. See ANALOG
OUT Programming on page 13 for information regarding set-up of the analog output.
Frequency Input Test Point
The RT-Ex15-Ex has a frequency input test point allowing the user to directly input a frequency
signal. This is especially useful for purposes of setting up and testing pulse output or analog
output signals during commissioning when flow is not present or where it is not feasible to allow
continuous flow for set-up and calibration purposes. The position of a programmable jumper
must be changed to allow use of the test point input. The test points and jumper positions are
detailed in the diagram below. Be certain to change the jumper back to the correct position
before beginning normal operation using the sensor nose.
Test Point input specifications:
Waveform: DC signal - pulse, square-wave, triangle, or sawtooth.
Minimum signal amplitude: 2 Volts peak.
Maximum signal amplitude: 10 Volts peak.
Frequency: 0-4000Hz
AD 4 2 1
LOOP +
LOOP -
m A LOOP OUTPUT (2- W IRE)
(Iso la ted )
+
R se nse
V lo op
AD 4 21
LOOP +
LOOP -
m A OUTPUT (3- W IRE)
+ Vc c
SUPPLY N EGATIVE
R se nse
+ -
(Lo o p Pow e r fro m RT- Ex15- Ex D C Sup p ly)
m A LED m A LED
R se nse = 2 50 Ohm m a x. @ 1 2- 1 5 Vd c
R se nse = 5 00 Ohm m a x. @ 1 5- 2 4 Vd c
1 2- 24 Vd c
R se nse = 2 5 0 Ohm m a x. @ 1 5 Vd c
R se nse = 5 0 0 Ohm m a x. @ 2 4 Vd c
N OTE: SEPERATE + 2 4VD C STILL REQUIRED TO POW ER UN IT
C ALIBRATION
TEST POIN TS
& JUM PER
RA 002.50
TA 003.23
GPD
GAL
GT
N orm al
Op eration
Jum p 1 & 2
1 2 3 1 2 3
Te st Po int
Op era tion
Jum p 2 & 3
JUM PER SETTIN GS
Test Po int (+ )
(Sig nal Inp ut)
Test Po int (- )
(Isolate d
Sup p ly
Co m m on)
Prog ra m
Jum p er