DC to Frequency Transmitters, Isolated, Field Rangeable
API 7500 G, API 7500 G SS
Input:
0-50 mV to ±10 VDC, 0-1 mA to 4-20 mA
Output:
0-1 Hz to 0-30 kHz MOSFET or TTL
O
24 Selectable Inputs and 30 Selectable Outputs
O
Setup via Rotary Switches & Easy-to-Use Tables
O
2000 V Full Isolation Input/Output/Power
O
Adjustable Low Frequency Cutout
O
Input and Output LoopTracker
®
LEDs
O
Functional Test Push Button
Q
Analog to Frequency for Totalizers and Counters
Q
Use With API 7580 for Remote Monitoring
Applications
Model
Input
Output
Power
API 7500 G
Field rangeable
voltage or milliamps
0-50 mVDC to ±10 VDC
0-1 mADC to 0-20 mADC
Field rangeable
0-100 Hz to 0-30 kHz
115 VAC
API 7500 G A230
230 VAC
API 7500 G P
85-265 VAC or 60-300 VDC
API 7500 G D
9-30 VDC
API 7500 G SS
Field rangeable
Low range version
0-1 Hz to 0-300 Hz
115 VAC
API 7500 G SS A230
230 VAC
API 7500 G SS P
85-265 VAC or 60-300 VDC
API 7500 G SS D
9-30 VDC
Description
The API 7500 G accepts a DC voltage or current input and
provides an optically isolated frequency output that is directly
proportional to the input. Common applications include pulse
counting or totalizing of DC process signals from devices such
as flow transmitters, analog signal transmission over long
distances, or analog inputs into PLCs. The full 3-way (input,
output, power) isolation makes this module useful for ground
loop elimination, common mode signal rejection, and noise
pickup reduction.
A low frequency cutout potentiometer can be adjusted to dis-
able the output when the input falls below a pre-determined
level. The API 7500 G can be field-configured via external
rotary and slide switches. Common ranges are on the module
label, however, virtually unlimited combinations are possible.
The API 7500 G has an open drain MOSFET (open collector)
output which requires a user supplied external power supply
and pull-up resistor allowing the module to be interfaced with
a wide variety of devices. For a TTL powered output, order the
M02 option.
Sink/Source Versatility
For maximum versatility the input can be selectively wired for
sinking (unpowered) or sourcing (powered) milliamp output.
The 18 VDC loop excitation supply can be used to power a
milliamp current loop if required. The input can also be wired
for an externally powered loop.
LoopTracker
API exclusive features include two LoopTracker LEDs (green for
input, red for output) that vary in intensity with changes in the
process input and output signals. These provide a quick visual
picture of your process loop at all times and can greatly aid in
saving time during initial startup and/or troubleshooting.
Output Test
An API exclusive feature includes the test button to provide a
fixed output (independent of the input) when held depressed.
The test output level is potentiometer adjustable from 0 to
100% of the output span.
The output test button greatly aids in saving time during initial
startup and/or troubleshooting.
DC Input Ranges
Voltage:
0-50 mVDC to ±10 VDC
Current:
0-1 mADC to 0-20 mADC including 4-20 mA
mA input may be wired for sink or source
Consult factory for other ranges
System voltages must not exceed socket voltage rating
Input Impedance
Voltage:
1 M
Ω
minimum
Current: 50
Ω
typical
Input Loop Power Supply
18 VDC nom., unregulated, 25 mADC, max. ripple, <1.5 V
p-p
LoopTracker
Variable brightness LEDs indicate I/O loop level and status
Frequency Output Ranges
Minimum Maximum Increments
Low range:
0-100 Hz
0-1500 Hz 100 Hz
High range:
0-2 kHz
0-30 kHz
2 kHz
Frequency Output Ranges, SS Version
Minimum Maximum Increments
SS low range: 0-1 Hz
0-15 Hz
1 Hz
SS high range: 0-20 Hz
0-300 Hz
20 Hz
Output Waveform and Type
Square wave
Normal acting, output freq. increases with increasing input
Output Driver
MOSFET output, open drain, 24 VDC maximum
I
sink
50 mA maximum
V
on
0.6 V maximum at 50 mA I
sink
M02 option: TTL output 1 V
p-p
to 12 V
p-p
depending on load
Cutout Control
Disables output when input falls below preset level
Adjustable from 2% to 25% of range
Top accessible, multi-turn potentiometer
Output Calibration
Multi-turn zero and span potentiometers
±15% of selected span typical
Output Test
Pressing top button sets output to test level
Potentiometer adjustable 2-100% of span
Linearity
Better than ±0.4% of span
Ambient Temperature Range and Stability
–10°C to +60°C operating ambient
Better than ±0.02% of span per °C stability
Response Time
70 milliseconds typical
Consult factory for faster response times
Isolation
2000 V
RMS
minimum
Full isolation: power to input, power to output, input to output
Installation Environment
IP 40, requires installation in panel or enclosure
Use with API 008 or API 008 FS socket
Socket mounts to 35 mm DIN rail or can be surface mounted
UL 508C pollution degree 2 environments or bettert
Power
Standard:
115 VAC ±10%, 50/60 Hz, 2.5 W max.
A230 option: 230 VAC ±10%, 50/60 Hz, 2.5 W max.
P option:
85-265 VAC 50/60 Hz, 60-300 VDC 2.5 W typ.
D option:
9-30 VDC, 1.5 W typical
Quick Link
api-usa.com/7500
Free Factory
I/O Setup!
Options—add to end of model number
M02
TTL powered output instead of MOSFET output
M03
Adjustable signal generator, no input
U
Conformal coating for moisture resistance
Accessories—order as separate line item
API 008
8-pin socket
API 008 FS
8-pin finger-safe socket
API CLP1
Module hold-down spring for high vibration or
mobile applications
2.75"
Minute
Setup!
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Made in USA
2.38"
1.75"
Variable Brightness
Input LED
Output Test Button
Output Zero
Output Span
Cutout Adjust
Output Test
Adjust
Variable Brightness
Output LED
Hot Swappable
Plug-In Design
API 008
600 V Rating
API 008 FS
300 V Rating
API CLP1
E145968
115 VAC, 230 VAC
models
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