Bulletin No. MDMU-F
Drawing No. LP0391
Released 12/09
Tel +1 (717) 767-6511
Fax +1 (717) 764-0839
www.redlion.net
MODEL MDMU - MINIATURE DISPLAY MODULE COUNTER/TIMER
LCD,
POSITIVE REFLECTIVE OR NEGATIVE TRANSMISSIVE
WITH YELLOW/GREEN OR RED BACKLIGHTING
& TIMER ALL IN A SINGLE UNIT
COUNTER
COUNT
9
POSITIVE OR NEGATIVE EDGE
RANGES IN TIMER MODE
DECIMAL POINTS
SELECTABLE
5
VDC POWERED
MOUNT OR PC BOARD MOUNT
PANEL
DESCRIPTION
The MDMU is a complete 6 digit Counter/Timer in a small panel or printed
circuit board mounted package. It is designed to operate from a 5 VDC power
supply. It has a 6 digit LCD, with 0.35" high digits, and 3 selectable decimal
points. In the timer modes, a flashing annunciator is supplied to indicate that the
signal input of the MDMU is active. The displays are available in positive image
reflective (black digits, reflective background) or negative image transmissive
(illuminated digits, dark background) with red or yellow/green backlighting.
The MDMU has four Mode Select and two Decimal Point Select inputs
available for determining the basic operation. In most applications, the MS and
DP inputs are hard wired to select the appropriate function (counter or timer)
and counter decimal point position.
The COUNTER mode is selected by setting the Mode select inputs to the
appropriate levels (Hardware selection). Decimal points may also be set using
the DP Inputs (Hardware selection).
The TIMER mode and range is selected by setting the Mode Select inputs to
the appropriate levels (Hardware selection). The timing range increments
available are 1 msec, 10 msec, 100 msec, 1 sec, 0.1 min, 1 min, 0.01 hr, 0.1 hr,
and 1 hr. The TIMER ACTIVE annunciator will flash at a 1 Hz rate when the
input to the timer is activated.
CAUTION
This device contains CMOS circuitry which requires special anti-static
handling to the same degree required by standard CMOS integrated
circuits. Units should be stored in the conductive package used to ship the
device. Containers should be opened and units handled only on a
conductive table top by personnel wearing wrist-strap grounding equipment.
These devices have the same protection circuits as standard CMOS devices
to prevent damage to inputs due to nominal over-voltage.
SPECIFICATIONS
1.
DISPLAY:
6 Digit LCD, 0.35" (8.89 mm) high characters, available in
positive image reflective (black digits, reflective background) or negative
image transmissive (illuminated digits, dark background) with red or yellow/
green backlighting.
2.
POWER REQUIREMENTS:
Reflective Versions:
5.0 VDC ±10% 100
μA
max.
Backlight Versions:
5.0 VDC ±10% 25 mA max.
3.
DECIMAL POINTS:
Timer:
Determined by the timing mode selected.
Counter:
3 programmable positions.
DIMENSIONS
In inches (mm)
Note: Recommended minimum clearance behind the panel for mounting clip installation is 2.25" (57.2)W x 1.5" (38.1)H
PANEL MOUNT UNIT
PANEL CUT-OUT
R 0.06 MAX., 4PL.
1.06
(26.9)
0.93
+.03
-.02
(23.6
+.8
-.5
)
(1.5)
1.81 (46.0)
NOTE: BACKLIGHT MODELS: 0.50" (12.7)
REFLECTIVE MODELS: 0.31" (8.0)
0.06
(1.5)
SEE
NOTE
0.2 (5.08) MAX.
0.14 (3.56) MIN.
1.68
+.03
-.02
(42.7
+.8
)
-.5
PRINTED CIRCUIT BOARD MOUNT UNIT
RECOMMENDED PCB LAYOUT
0.90
(22.9)
0.19 (4.8)
UNIT OUTLINE
0.10 (2.5)
0.12 (3.1)
Ø 0.042 (1.07) THRU, 15 PL.
1.65 (41.9)
SEE
NOTE
NOTE: BACKLIGHT MODELS: 0.56" (14.2)
REFLECTIVE MODELS: 0.37" (9.4)
0.2 (5.08) MAX.
0.14 (3.56) MIN.
1
4.
ANNUNCIATOR:
Flashes at a 1 Hz rate in the Timer mode when the signal
input (CNT) is activated.
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)
Transmissive Panel Mount:
0.38 oz (10.43 g)
Transmissive PCB Mount:
0.356 (9.75 g)
MAXIMUM RATINGS
RATING
SYMBOL
VALUE
UNITS
DC Supply Voltage
Input Voltage, all inputs
Operating Temperature
Storage Temperature
V
DD
V
IN
T
A
T
STG
5.5
-0.5 to (V
DD
+0.5)
-35 to +85
-40 to +85
VDC
VDC
°C
°C
ELECTRICAL SPECIFICATIONS - V
DD
= 5.0 VDC =
10%
@ 25
C
unless otherwise specified.
SYMBOL
PARAMETER
MIN
TYP
MAX
UNITS
NOTES
V
DD
I
DD
I
DD
V
IH
V
IL
I
IN
Fc
T
R
,
L
A
CCTB
Supply Voltage
Supply Current - Transmissive
Supply Current - Reflective
Valid High Voltage
Valid Low Voltage
Input Leakage Current
Count Frequency - CNT
RST, LATCH Pulse Width
Time Base Accuracy
4.5
5.0
20
50
5.5
25
100
1.5
VDC
mA
A
VDC
VDC
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.
3.0
0.1
30
0.025
1.0
9.9
A
KHz
50% Duty cycle
sec
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
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,
and the closer it is to a source of
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.
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.
NO CONNECTION
NO CONNECTION
NO CONNECTION
LATCH
NO CONNECTION
DP2
DP1
V
DD
V
SS
(GND)
CNT
MS1
MS2
MS3
MS4
RST
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
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
PIN DESCRIPTIONS
(All inputs are Schmidt trigger inputs)
V
DD
: +5 VDC power
V
SS
: GND or common supply terminal
DP1 & DP2:
Counters - See Decimal Point Configuration Chart
Timers - Tie low
MS1-MS4:
See Mode Select Inputs Chart
RST:
Active low, will reset the display to zero
LATCH:
Counters - A HIGH level will freeze the display, a LOW level will
allow the counter to update the display normally
Timers - Tie low
CNT:
Counters - This is the count input (edge trigger determined by mode)
Timers - This is the run input (active low = timer runs)
MODE SELECT INPUTS CHART
MODE
MS4
MS3
MS2
MS1
MODE OF OPERATION
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0.001 Second Timer
0.01 Second Timer
0.1 Second Timer
1 Second Timer
0.1 Minute Timer
1 Minute Timer
0.01 Hour Timer
0.1 Hour Timer
1 Hour Timer
DO NOT USE
Negative Edge Counter
Positive Edge Counter
DO NOT USE
DO NOT USE
DO NOT USE
DO NOT USE
DECIMAL POINT CONFIGURATION CHART
DP2
DP1
DISPLAY
0
0
1
1
0
1
0
1
0
0.0
0.00
0.000
TYPICAL APPLICATIONS
COUNTER
- TTL signal input counting. Positive edge
incrementing (leading edge).
GND
+5 V
1 MINUTE TIMER
- With Leading Zero Blanking
enabled. Time starts with the switch closed. Time
stops and holds the display with the switch open.
GND
TIMER
RUN
V
SS
(GND)
CNT
NO CONNECTION
NO CONNECTION
+5 V
V
SS
(GND)
CNT
NO CONNECTION
NO CONNECTION
NO CONNECTION
LATCH
RST
MS1
MS2
MS3
MS4
NO CONNECTION
DP2
DP1
V
DD
TTL SIGNAL
220K
.0022 µf
220K
NO CONNECTION
LATCH
RST
MS1
MS2
MS3
MS4
DP2
DP1
V
DD
.0022 µf
220K
RST
RST
ORDERING INFORMATION
ACCESSORY: MDM CABLE ASSEMBLY - HWK70000
COLOR CODED RIBBON CABLE
STRIPPED AND TINNED
MODEL NO
DESCRIPTION
PART NUMBER
Panel Mount W/Reflective Display
Panel Mount W/Yel-Grn Backlighting
MDMU
Panel Mount W/Red Backlighting
PC Board Mount W/Reflective Display
PC Board Mount W/Yel-Grn Backlighting
PC Board Mount W/Red Backlighting
HWK7
MDM Cable Assembly
MDMU0000
MDMU0010
MDMU0020
MDMU0100
MDMU0110
MDMU0120
HWK70000
0.100 (2.54), TYP.
0.100 (2.54), TYP.
CIRCUIT #1; BROWN
12 (305)
0.15 (3.8)
3
LIMITED WARRANTY
The Company warrants the products it manufactures against defects in materials and workmanship
for a period limited to two years from the date of shipment, provided the products have been stored,
handled, installed, and used under proper conditions. The Company’s liability under this limited
warranty shall extend only to the repair or replacement of a defective product, at The Company’s
option. The Company disclaims all liability for any affirmation, promise or representation with
respect to the products.
The customer agrees to hold Red Lion Controls harmless from, defend, and indemnify RLC
against damages, claims, and expenses arising out of subsequent sales of RLC products or products
containing components manufactured by RLC and based upon personal injuries, deaths, property
damage, lost profits, and other matters which Buyer, its employees, or sub-contractors are or may be
to any extent liable, including without limitation penalties imposed by the Consumer Product Safety
Act (P.L. 92-573) and liability imposed upon any person pursuant to the Magnuson-Moss Warranty
Act (P.L. 93-637), as now in effect or as amended hereafter.
No warranties expressed or implied are created with respect to The Company’s products except
those expressly contained herein. The Customer acknowledges the disclaimers and limitations
contained herein and relies on no other warranties or affirmations.
Red Lion Controls
Headquarters
20 Willow Springs Circle
York PA 17406
Tel +1 (717) 767-6511
Fax +1 (717) 764-0839
Red Lion Controls
Europe
Printerweg 10
NL - 3821 AD Amersfoort
Tel +31 (0) 334 723 225
Fax +31 (0) 334 893 793
Red Lion Controls
India
54, Vishvas Tenement
GST Road, New Ranip,
Ahmedabad-382480 Gujarat, India
Tel +91 987 954 0503
Fax +91 79 275 31 350
Red Lion Controls
China
Unit 101, XinAn Plaza
Building 13, No.99 Tianzhou Road
ShangHai, P.R. China 200223
Tel +86 21 6113-3688
Fax +86 21 6113-3683
stm32/stm8
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