Owner's manual

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Hookup Diagram, MA4-2 ONE-SHOT ModuleFunctional Schematic, MA4-2 ONE-SHOT Module
Non-retriggerable one-shot logic:Retriggerable one-shot logic:
There are two types of basic "one-shots": RETRIGGERABLE and NON-RETRIG-
GERABLE. The output pulse timing of a retriggerable one-shot is re-started with
the reoccurance of every input. The output will remain "on" as long as the time
between consecutive inputs is shorter than the one-shot pulse time (see timing
diagram, below).
A non-retriggerable one-shot timer must complete a pulse before it will accept any
new input signals. Non-retriggerable one-shots sometimes offer an advantage
in indexing or registration control applications where multiple input signals are
possible during advance of the product. The MA4-2 may be programmed for the
non-retriggerable mode by connecting pin #6 to pin #8.
MICRO-AMP MA4-2 Specifications
SUPPLY VOLTAGE: 10 to 30V dc at less than 20 milliamps (exclusive of
load); 10% maximum ripple.
INPUTS: INPUT and INHIBIT both respond to a logic "low" signal (less than
2V dc). A logic "high" is at least 6V dc or an open circuit. Inputs must be
capable of sinking at least 4 milliamps. Inputs may be derived from limit
switches or from dc sensors with NPN (current sinking) output transistors.
RESPONSE SPEED: INPUT and INHIBIT will respond to a low signal or high
signal of 1 millisecond duration or longer.
OUTPUT CONFIGURATION: two open-collector NPN transistors with com-
plementary outputs (one normally open, one normally closed). Maximum
sinking current 150 milliamps, each output. Saturation voltage less than
0.5V dc at 10 milliamps. Off-state leakage current less than 1 microamp.
PULSE DURATION: standard range is .001 to .1 second. Programmable
ranges are .01 to 1 second and 1 to 15 seconds. Select the .01 to 1 second
range by connecting pin #2 to pin #3. Select the 1 to 15 second range by
connecting #1 to #3.
TIMING ADJUSTMENT: single-turn timing potentiometer allows adjustment
of pulse duration within the selected range (use small flat-bladed screw-
driver).
INDICATOR: red LED indicator on the top of the module lights whenever the
N/O output is conducting (i.e. when the N/O output is closed and the N/C
output is open).
CONSTRUCTION: totally encapsulated plug-in package with molded VALOX
®
housing. Gold-flashed connection pins.
OPERATING TEMPERATURE:
0 to 70 degrees C (32 to 158 degrees F).
MICRO-AMP
®
System
MA4-2 One-Shot Logic Module
Printed in USA P/N 03350 Rev. C
OUTPUT
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INPUT
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INHIBIT
Pulse
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MICRO-AMP
®
module MA4-2 is a plug-in one-shot logic module with adjustable pulse length. It is
designed as a way to easily add one-shot timing to a MICRO-AMP system which uses an MA3 or
MA3-4 amplifier. It may also be used to add a one-shot timer to any current sinking DC device or to
a system which offers a contact closure output. The MA4-2 is a perfect add-on to any Banner dc
system, including dc models of OMNI-BEAM, MULTI-BEAM, MAXI-BEAM, VALU-BEAM, MINI-BEAM,
ECONO-BEAM, QØ8, Q19, Q25, S18, SM3Ø, and SM512 Series self-contained sensors.
A low-going logic INPUT signal at pin #7 of the module activates a one-shot output at both pins #5
and #6, unless a low-going logic INHIBIT signal is present at pin #8 when the input occurs. Both
NORMALLY OPEN (pin #6) and NORMALLY CLOSED (pin #5) outputs are available. Both are NPN
open-collector (current sinking) transistors, each capable of switching up to 150 milliamps.
Three pulse duration time ranges are selectable. The 0.001 to 0.1 second range is standard, and
0.01 to 1 second and 1 to 15 second ranges are selected by connecting the appropriate module pin
to pin #3 (dc common). The MA4-2 is a retriggerable-type one-shot, but may easily be programmed
to the non-retriggerable mode by connecting pin #6 (N/O output) to pin #8 (INHIBIT input).
One-shot logic, MA4-2: