Manual

PUB -19560-1000
Page 1 of 2
SpecificationsGeneral Information
AD30 Analog to Pulse
Converter Instructions
This simple, compact module converts a 4-20 mA ana-
log signal into a pulse frequency, typically to control a
pulse-type chemical metering pump. The most com-
mon applications involve injecting chemical proportional
to some measured variable, such as pH, ORP, or flow.
Designed for simplicity of use, the unit is encapsulated
and pre-wired, with input and output connectors as speci-
fied. Frequency at 20 mA is user settable, with a choice
of 60, 80, 100, or 150 pulses per minute. So that it can
work with a wide variety of metering pumps, the AD30 is
loop-powered and requires no other power supply. Low
impedence makes it possible to connect several units
to a single current loop.
The unit can be mounted with screws through a lug on
each side, or with the supplied double-backed tape.
Standard input cable length is 12 feet, and standard
output length is 24 inches. An LMI connector is stan-
dard; pigtails are available for other pumps.
Power 14 - 30 VDC
Minimum Current 3.9 mA
Accuracy
Linearity ± 1% FS
Zero Drift 0.06% per
°C of full scale
Span drift 0.04% per
°C of output frequency
Output Solid state relay
Max Output Sink 120 mA at 110 VAC/
VDC
Operating Temperature 32° F to 140° F
Storage Temperature -40° F to 175° F
Features
RED+
BLACK-
RED+
BLACK-
INPUT
4-20mA
OUTPUT
PULSE
PPMMAXIMUM
AnalogtoPulseConverter
Screwor
double-backed
tapemounting
Encapsulated
forenvironmental
protection
Pumpconnector
asspecifiedfor
convenient
hookup
Choiceofmaximum
pulsefrequency:
60
80
100
150
4-20mA
input
DISCONTINUED