Electronic pulse counter / Pulse counter + -

Detailed description

General specifications of the DS-72A pulse counter:

2x 6-digit displays,

2x PRESET values,

2x OUT outputs for relays,

2x SSR outputs for SSR relay control.

Counts signals from mechanical switches, limit switches, PNP/NPN inductive proximity sensors, and incremental encoder inputs.

Up/down counting.

Password protection.

Selectable input frequency: 20, 50, 2500, 7500 Hz.

Calibration constant: 0.00001.....9.99999

Selectable decimal point: 0 / 0.0 / 0.00 / 0.000

Function combination options: 7 input functions / 10 output functions:

Addition,

Countdown,

Addition/subtraction from two inputs simultaneously,

Count/preset pause controlled by the second input,

Input negation controlled by the second input,

Addition/subtraction from rising edge / falling edge / both edges simultaneously,

Addition from rising edge / subtraction from falling edge / negation of function from second input.

"OFFSET" adjustable of the calculated value.

PRESET1 with absolute/relative value option.

OUT relay 2x: active upon reaching the value and maintained until RESET, or pulse in the range 0.1.....999.9 seconds.

Remembers the pulse count value and the OUT relay status at the last power interruption and can be restored at first power-on.

RESET via front panel button or signal at RESET terminal (17).

Can display preset values of ½.

EEPROM memory for storing settings.

Technical features:

Dimensions / Opening: 72x72x94 mm / 67x67 mm

Display: 2x 6-digit 7-segment LED displays.

LED indicators: 5x: OUT1, OUT2, Finger1, Finger2, Batch.

Inputs: 2x (Max: 7500 Hz, 5-30 V)

NPN selection: connect the "npn select" terminal (13) to the "+12V" terminal (14) to connect the NPN sensor connected to input Cp1 (15) and Cp2 (16).

The reset input is always PNP.

For totem-field or PNP type encoders, the "npn select" will not be connected.

Input types: mechanical switch, inductive encoder PNP/NPN encoder output NPN/PNP/totem-pole.

Input frequencies: 20, 50, 2500, 7500 Hz.

Reset signal: RESET terminal (17), minimum 10 ms, + signal (PNP only) (5...30 V).

Outputs (OUT):

2x SPDT relays 250VAC, 2A, resistive load,

OUT1: terminals 6=COM, 5=NO, 7=NC

OUT2: terminals 9=COM, 8=NO, 10=NC

SSout 2x SSR Control - NPN, 30V, 100mA max, terminal 18=SSout1, 19=SSout2, 20=GND

Sensor power supply: terminal (14) 12 VDC, 50 mA (max.), unregulated.

Supply voltage: 100...240VAC, 50-60Hz.

Power consumption: < 8 VA

Operating temperature: -20°C ... +55°C

Altitude: <2000m

Installation notes:

Use shielded and twisted signal cables and connect the shield to ground. Keep all signal cables away from switches, inductive loads, equipment/cables emitting electrical noise, and power cables. Take precautions against environmental influences such as humidity, vibration, pollution, and high/low installation temperature.

Use a fuse (F250mA 250VAC) at the equipment's mains/power input.

Use appropriate power cables. Follow safety regulations during installation.

Prefer the option (Inpt = Phs1) for encoders,

Select (Freq = 20) for counting pulses from the mechanical ON-OFF switch.

Always select the minimum input frequency option suitable for the application.

For Inpt = 1u2u, 1u2d, Phs2; the input signal frequency must not exceed ½ of the selected input frequency option when using both inputs.