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
Maximum 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
Ambient Temp. : Operating	-5 – +40°C (non-freezing)	0 – 40°C (non-freezing)
Ambient Humid. : Operating	45 – 85%RH (non-condensing)
Hi-pot Test	AC1500V (1 minute)
Dielectric Test	20MΩ min. (DC500V megger)
Connection	M3 Terminal Screw
Compliance	–

Electronic Preset CountersMD Series

Models