Product Made in Japan
Manufacturer: Line Seiki
Model: MD Series

MD Series Electronic Preset Counter

Model

Models	Digits	Preset	Preset Digits	Preset Range	Memory	Weight
MD-144	4	1	4	1 – 9999	–	540 g
MD-144M			4	1 – 9999	O	560 g

Description

The MD (Preset) Series is a 4 digits LED single level preset counter in a DIN 72 x 72 panel size (Panel Cut-out size: 68 x 68mm).  This is a very simple additive preset counter but functional.  With a counting speed of 1kHz maximum, this counter accepts Contact or Non-Contact pulse input.  It is equipped with an internal contact relay and NPN Open collector, which sends an output signal when the preset value is reached.  Preset value can easily be set via the front panel digital switches and there are LED indicators that show the state of the unit.  The MD Series is powered by AC100/110V or AC200/220V, selectable, and it has an external power supply of DC12V for sensors.  The unit can only be reset remotely, auto reset, or by power reset.  Memory is optional.

Specification

Models	MD-144	MD-144M
Display	Red LED, 14.22 x 8.13mm (Zero Suppress)
Input Method / Signal	Contact Input: Relay, Microswitch Non-Contact Input : L : 0 – 1V ; H : 4.5 – 27
Count Mode	Additive only
Count Speed	Contact Input : 20 Hz max. / Non-Contact Input : 1000 Hz max.
Pulse Width	Contact Input : 25 msec min. / Non-Contact Input : 0.5 msec min.
Make (Duty)	1 : 1
Output Type	Contact output : Relay Type 1A only (AC250V, 0.5A / DC30V, 2A maximum Load) Non-contact output : NPN open collector (DC30V, 100mA maximum)
Output Display	Turns ON during output time
Output Time	One-shot mode: 0.2 / 1sec Overrun mode: Infinite
Reset	Remote reset (100msec min.) Auto-reset: One-shot reset (Output relay – 0.2s /1s reset)
Memory	None	E²PROM (10 years. retention, 10,000 times)
Power Source for Sensor	DC12V 30mA maximum
Input Impedance	5kΩ
Power Source	AC100/110V or AC200/220V ±10%, 50/60 Hz
Power Consumption	Approximately 4VA
Operating Temperature	-5 – +40°C (non-freezing)	0 – 40°C (non-freezing)
Operating Humidity	45 – 85% RH (non-condensing)
Hi-pot Test	AC1500V (1 minute)
Dielectric Test	20MΩ min. (DC500V megger)
Connection	M3 Terminal Screw

Rear Terminals and Wiring

Attention

1. Do not feed a voltage signal into the Contact Input (1) terminal and Remote Reset (5) terminal. This may cause damage to the internal circuit of the unit.
2. Contact and Non-contact input cannot be used simultaneously. Please choose only one method of input.
3. For memory type models (MD-122M and MD-144M), during a power failure, LED display will go off. At this time, the counter cannot detect input or reset signals even if signals are received.
4. For models: MD-122M and MD-144M, make sure to short terminals 7 and 8 to enable the memory function. When the counter will be shut down for a long period of time, disconnect terminals 7 and 8 to prevent the discharge of the internal battery. The internal battery is charged when power is supplied to the counter.
5. Use shielded lead wires for the Input terminal and Reset terminal. Also, make the lines from the power source as far as possible from the lines of the Input and Reset lines.
6. In One-shot mode, the counter does not count even if input signal is received during the output time (0.2 or 1 sec).

Connection

Operating Mode

The count value will increment when input signal is received. When the count value reaches the Preset Value, an output signal is provided by a relay or open collector. The output relay or open collector is actuated at the preset number and it is automatically unlatched in 0.2 or 1 second. The preset value is instantaneously reset to zero and the counter immediately begins to accept input signals again. This type is ideally suited for controls on continuous production applications.

The count value will increment when the input signal is received. When the count value reaches the Preset Value, an output signal is provided by a relay or open collector. The output relay or open collector is actuated at the preset number and will remain latched until a reset signal is sent to the counter. The counter will continue counting during output until the counter is reset.

Dimension

Application

Product Counting

Counters can be used for counting, sorting and packaging various products.

Cut-to-length operation

Counters and CT1/CS pulse generators can be used for cut-to-length operation for textiles, paper, plastic films and so on.

Length Measuring

Counters and rotary encoders can be used for measuring the length of textiles, paper, plastic film and so on.

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