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Functional Schematic, MA5 DELAY Module Hookup Diagram, MA5 DELAY Module
MICRO-AMP ® model MA5 is a plug-in delay logic module with adjustable delay
timing. It is designed as a way to easily add an ON DELAY or an OFF DELAY timer
to a MICRO-AMP system which uses an MA3 or MA3-4 amplifier. It may also be
used to add a delay timer to any current sinking dc device or to a system which offers
a contact closure output.
A low-going logic INPUT signal at pin #7 of the module activates an ON DELAY
timer. If the signal remains longer than the set ON DELAY time, the output at both
pins #5 and #6 will change state. If pin #8 is connected to pin #3, the MA5 is
converted to an OFF DELAY timer. In the OFF DELAY mode, an output will occur
immediately when an input signal appears at pin #7, and the output will remain "on"
after the input is removed for the OFF DELAY time period.
The MA5 may be programmed to respond to a high-going input signal by connecting
pin #1 to pin #3. Both NORMALLY OPEN (pin #6) and NORMALLY CLOSED
(pin #5) outputs are available (simultaneously). Both outputs are NPN open-
collector (current sinking) transistors, each capable of switching up to 150
milliamps.
Two delay time ranges are selectable. The .01 to 1 second range is standard, and a
1 to 15 second range may be programmed by connecting pin #2 to pin #3. A
potentiometer allows fine adjustment within each time range.
The MA5 may be mounted and wired using the optional RS8 socket, or it may be
wired into a printed circuit board either directly or by using the model RS8K PC
board socket.
OUTPUT
INPUT
Delay
On-delay logic, MA5:
Off-delay logic, MA5:
OUTPUT
INPUT
Hold Hold
SUPPLY VOLTAGE: 10 to 30V dc at less than 20 milliamps
(exclusive of load); 10% maximum ripple.
INPUTS: A logic "low" must be less than 2V dc) A logic "high" is
at least 6V dc or an open circuit. Connecting pin #1 to pin #3 (dc
common) causes the MA5 to respond to "high-going" signals. 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 will respond to a low or high signal of
1 millisecond or longer duration.
OUTPUT CONFIGURATION: two open-collector NPN transis-
tors with complementary 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.
DELAY SELECTION: connect pin #8 to pin #3 (dc common) for
OFF DELAY operation. For ON DELAY operation, leave pin #8
unconnected.
DELAY DURATION: standard range is .01 to 1 second. Select the
1 to 15 second range by connecting pin #2 to pin #3.
TIMING ADJUSTMENT: single-turn timing potentiometer allows
adjustment of delay time within the selected range (use small flat-
bladed screwdriver for adjustment).
INDICATOR: red LED indicator on the top of the module lights
whenever the N/O output is conducting.
CONSTRUCTION: totally encapsulated plug-in package with
molded VALOX
® housing. Gold-flashed connection pins.
OPERATING TEMPERATURE:
0 to 70 degrees C (31 to 158 degrees F).
MICRO-AMP MA5 Specifications
MICRO-AMP ® System
MA5 Delay Logic Module
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