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4. ANNUNCIATOR : Flashes at a 1 Hz rate in the Timer mode when the signal
input (CNT) is activated.
MAXIMUM RATINGS
5. CONSTRUCTION : High impact black plastic case (mounting clip included
with panel mount models).
6 RELATIVE HUMIDITY : Less than 85% RH (non condensing)
7. WEIGHT :
Reflective Panel Mount : 0.275 oz (7.26 g)
Reflective PCB Mount : 0.26 oz (6.8 g)
RATING
DC Supply Voltage
Input Voltage, all inputs
Operating Temperature
Storage Temperature
SYMBOL
V DD
V IN
T A
T STG
VALUE
5.5
-0.5 to (V DD +0.5)
-35 to +85
-40 to +85
UNITS
VDC
VDC
°C
°C
Transmissive Panel Mount : 0.38 oz (10.43 g)
Transmissive PCB Mount : 0.356 (9.75 g)
ELECTRICAL SPECIFICATIONS - V DD = 5.0 VDC = ? 10% @ 25 ? C unless otherwise specified.
SYMBOL
V DD
I DD
I DD
PARAMETER
Supply Voltage
Supply Current - Transmissive
Supply Current - Reflective
MIN
4.5
TYP
5.0
20
50
MAX
5.5
25
100
UNITS
VDC
mA
? A
NOTES
Voltages outside these parameters may cause display problems
V DD = 5.0 VDC - 10 KHz Counting Rate.
V DD = 5.0 VDC - 10 KHz Counting Rate.
V IH
V IL
Valid High Voltage
Valid Low Voltage
3.0
1.5
VDC
VDC
I IN
Input Leakage Current
0.1
1.0
? A
Fc
T R , L
A CCTB
Count Frequency - CNT
RST, LATCH Pulse Width
Time Base Accuracy
30
9.9
0.025
KHz
? sec
?
50% Duty cycle
INSTALLATION
The MDMUs are available in either a panel mount or printed circuit board
mount design. The panel mount units are provided with a mounting clip to
securely hold the unit in the panel cutout.
WIRING CONNECTIONS
The electrical connections are
made via terminal pins located on
the back of the unit. The terminal
and the closer it is to a source of
Panel Mount Installation:
1. Cut panel opening to specified
dimensions. Remove burrs
and clean the panel opening.
2. Install MDMU through the
panel cutout as shown in
Figure 1.
3. Slide mounting clip over rear
of unit until clip is against the
back of panel. The unit has
slots for the locking tabs to
hold it in the panel opening.
Note: Hold the MDMU front
bezel in place when sliding the
mounting clip in to position
EXISTING PANEL THICKNESS
0.031" to 0.125"
(0.79 to 3.18)
LOCKING
TAB
BEZEL
MOUNTING CLIP
Figure 1
pins are on 0.100" center lines and
can be mated with the RLC Model
HWK7 cable assembly or many
standard 0.100" center line
connectors. When wiring the unit,
refer to Figure 2 to identify the
wire position with the proper
function.
There are certain considerations
that should be observed when
running the signal wires. A length
of wire can act like an antenna,
Figure 2
electrical noise, the more it
becomes susceptible to that noise.
These are a few rules that should be followed when running these wires.
PCB Mount Installation:
1. Prepare printed circuit board hole pattern to the specifications.
2. Unit should be hand soldered using good soldering techniques and hand
cleaned if necessary.
2
1. Never run signal wires in the same conduit or raceway with A.C. power lines,
conductors feeding motors, solenoids, SCR controls, heaters, etc.
2. Signal wires within enclosures should be routed as far away as possible from
contactors, control relays, transformers, and other noisy components.
3. When shielded wire is used, connect the shield to the common of the MDMU
unit, and leave the other end of the shield disconnected and insulated from
machine ground.
4. Connect common of the MDMU to machine ground at one point only.
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