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Protecting the
Integrity of
Track-Hold/Peak-Hold
Process Function
ACTION PAK®AP4570
Provides Signal “T rack & Hold” or
“Track & P eak Hold” Capability
MODEL
DESCRIPTION
The AP4570 offers two modes of operation - Track & Hold and
Track & Peak-Hold. In “Track & Hold” operation the output tracks
the input signal. When an external contact is closed, the input level
Benefits
! Digital Design Prevents
Output “Droop”
! Peak Detection Applica-
tions
! Low-Cost “Sample & Hold”
Applications
! AC Line Powered
! Three Year Warranty
is “saved” and its corresponding output signal is held indefinitely
until the contact is opened. Releasing the hold switch (pins 8 and
11) allows the output to again follow the input. The “Track & PeakHold” mode is similar to “Track & Hold” operation except upon
contact closure (pins 8 and 11) the highest input is “saved” and the
corresponding output is held until a higher signal level occurs.
APPLICATION
Model AP4570 is useful in capturing DC-input signals to be held
for further processing or signal-conditioning. Typical applications
include monitoring peak electrical or energy demands, capturing
process conditions such as flow rates, equipment protection and
taring to factor out unwanted dead weight.
Industrial
Process Signals
OPTIONS
CS Canadian Standards Association Certification.
U Urethane coating of internal circuitry for protection from
corrosive atmospheres
CALIBRATION
Top-accessed screwdriver adjustments provide typical ±10% zero
and span adjustability. Calibration is referred to input in that
adjustments are to correct for input/sensor variations. Zero is
adjusted for the specified minimum output with the input at the
desired minimum. Span is adjusted for the specified maximum
output with the input at the desired maximum. Repeat adjustments
for maximum accuracy.
An Invensys Company
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SPECIFICATIONS
Input Impedance Voltage Input: >200KΩ
Current Input: 20Ω
Output Impedance Voltage Output: <10Ω
Current Output: >100KΩ
Output Drive Voltage Output: 10mA, max (1KΩ, min. @ 10V)
Current Output: 15V compliance @ 20mA (750Ω, max)
Response Time 100msec. typical
Linearity ±0.05% of span, typical
Output Resolution
(digital tracking) 1 part in 512
Stability (15-minute
warm-up) ±0.02%/°C typical
Output Ripple 0.25% of max. span, rms or 2mV, whichever is greater
Common Mode
Rejection 60 Hz: >80dB
DC: >100dB
Common Mode Voltage 600V DC or peak AC max
Temperature Range Operating: 0 to 60°C (32 to 140°F)
Storage: -20 to 85°C (-4 to 185°F)
Power Consumption: 3W typical, 5W max
Standard: 120VAC (±10%, 50-400Hz)
Available: 240VAC (±10%, 50-400Hz)
Weight 0.56lbs
Table 1:AP4570
Standard Input/Output Ranges*
0-1V 1-5V 10-50mA
0-5V 0-10V 4-20mA
Table 2: AP4570 Input Limits
Minimum Span Maximum Input
Voltage Current Voltage Current
100mV 1mA 200V 1A
Table 3: AP4570 Output Limits
Minimum Span Maximum Output
Voltage Current Voltage Current
100mV 1mA 10V 50mA
* Consult factory for non-standard I/O ranges.
DIMENSIONS
Dimensions are in mm (inches)
M011 (Track/Surface)
Retaining Spring
Available: Model M801
MD11 (DIN/Surface)
MODELS & ACCESSORIES
Mounting
AAll Action Paks feature plug-in installation. Model
AP4570 uses an 11-pin base and either molded socket
M011, or DIN rail MD11.
Ordering Information
Specify:
1. Model: AP4570
2. Input Range (see Tables 1, 2)
3. Output Range (see Tables 1, 3)
4. Options: CS, U (see text)
5. Line Power (see specs.)
(All power supplies are transformer-isolated from the
internal circuitry.)
721-0349-00-G 1/08
Pin Connections
1 AC Power (Line)
2 Shield (Gnd)
3 AC Power (Neu)
4 Input (+)
5 Input (-)
6 Mode Select Open: Track & Hold
7 Mode Select Closed: Track & Peak/Hold
9 Output (+)
10 Output (-)
8 Hold Select
11 Hold Select
Open: Track
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