·Some details are not shown. Please refer to specification sheets for all information.

PDU

Plug-in Signal Conditioners M-UNIT

PULSE SCALER
(pulse dividing; selectable range)

Functions & Features
• Galvanically isolating pulse rate signals and converting them into convenient engineering unit
• Excitation
• Scaling factor adjustable with the front switches
• Uniform output pulse
• Various outputs (relay, open collector and voltage pulses)
• Isolation up to 2000 V AC
• High-density mounting
Typical Applications
• Positive displacement flowmeters and turbine meters
• Dry contact signal produced at rotating machine
 

MODEL: PDU–[1][2][3][4]–[5][6]

ORDERING INFORMATION
• Code number: PDU-[1][2][3][4]-[5][6]
Specify a code from below for each of [1] through [6].
  (e.g. PDU-CM1N-B/Q)
• Use Ordering Information Sheet (No. ESU-1368). Default setting (table below) will be used if not otherwise specified.
• Specify the specification for option code /Q
  (e.g. /C01/S01)

[1] INPUT
A: Dry contact
B: Voltage pulse (Specify sensitivity)
C: 5 V pulse (sensitivity 2 V)
D: 12 V/24 V pulse (sensitivity 5 V)
H: Two-wire current pulse

[2] OUTPUT
A: Open collector (max. 100 kHz)
M: 5 V pulse (max. 100 kHz)
N: 12 V pulse (max. 100 kHz)
P: 24 V pulse  (max. 100 kHz)
H: Relay contact (max. 5 Hz)
( ) = Max. frequency

[3] OUTPUT PULSE WIDTH
1: One-shot output (5 – 200 μsec.)
(Not selectable with relay contact.)
2: One-shot output (0.18 – 9 msec.)
(Not selectable with relay contact.)
3: One-shot output (9 – 400 msec.)

[4] OUTPUT LOGIC
N: The same as the input
R: Inverted

[5] POWER INPUT
AC Power
B: 100 V AC
C: 110 V AC
D: 115 V AC
F: 120 V AC
G: 200 V AC
H: 220 V AC
J: 240 V AC
DC Power
S: 12 V DC
R: 24 V DC
V: 48 V DC

[6] OPTIONS
blank: none
/Q: With options (specify the specification)

SPECIFICATIONS OF OPTION: Q (multiple selections)
COATING (For the detail, refer to M-System's web site.)
/C01: Silicone coating
/C02: Polyurethane coating
/C03: Rubber coating
TERMINAL SCREW MATERIAL
/S01: Stainless steel

GENERAL SPECIFICATIONS
Construction: Plug-in
Connection: M3.5 screw terminals
Screw terminal: Chromated steel (standard) or stainless steel
Housing material: Flame-resistant resin (black)
Isolation: Input to output to power
Input pulse sensing: DC coupled
Sensitivity adjustment: Single-turn screwdriver adjustment (front); 0 – ±7 V
Hysteresis (deadband): Approx. 0.5 V
Input filter: Provided for 10 Hz or lower output frequency (time constant approx. 1 msec.)
Scaling factor adjustment: 10-position rotary switches (front);
1 / ( m × 10 ^n)  m = 1 - 9999, n = 0 - 6
Output pulse width adjustment: Multi-turn screwdriver adjustment (front); 5 μsec. – 400 msec.

INPUT SPECIFICATIONS
Frequency range: 0 – 100 kHz (10 Hz max. with filter)
Excitation: 12 V DC @ 30 mA; shortcircuit protection
Pulse width time requirement: 5 μsec. min. (10 ms with filter)
Dry Contact
Sensing
: 7.5V DC @ 1mA
ON/OFF level: ≥ 30 kΩ/5 V for OFF; ≤ 1 kΩ/1 V for ON
Voltage Pulse: Specify DC offset and amplitude.
Waveform: Square or sine
Input impedance: 10 kΩ min.
Input amplitude: 2 – 50 Vp-p
Offset: 0 – ±7 V
Max. voltage between input terminals: ±32 V
5V, 12V, 24V Pulse
Waveform
: Square or sine
Input impedance: 10 kΩ min.
Detecting level
(Input: 5 V pulse: 12 V/24 V pulse)
  VH:  ≥ 3 V:  ≥ 6 V
  VL: ≤ 1 V:  ≤ 4 V
Two-wire Current Pulse
Input resistance
: Receiving resistor 220 Ω
Maximum current: ±50 mA
Hi/Lo level: ≤ 5 mA for Lo, ≥ 15 mA for Hi

OUTPUT SPECIFICATIONS
Open Collector: 50 V DC @ 50 mA (resistive load)
Maximum frequency: 100 kHz with load resistance ≤ 1 kΩ
Saturation voltage: 1.0 V DC
Voltage Pulse:
 High level: Rating (5, 12 or 24 V) ±10 %
 Low level: ≤ 0.5 V
Maximum frequency: 100 kHz
Load resistance:
1 kΩ min. for 5 V
2.4 kΩ min. for 12 V,
4.8 kΩ min. for 24 V
Relay Contact:
120 V AC @ 200 mA (cos ø = 1)
30 V DC @ 200 mA (resistive load)
Electrical life 3 × 105 cycles (rate 30/min.)
Maximum switching voltage: 250 V AC or 30 V DC
Maximum switching power: 24 VA or 6 W
Minimum load: 5 V DC @ 10 mA
Mechanical life: 2 × 107 cycles
For maximum relay life with inductive loads, external protection is recommended.
Maximum frequency: 5 Hz

OUTPUT PULSE WIDTH
One-shot Output: Preset pulse width ±20 %;
The pulse width is factory set to approx. 50 % duty ratio at the maximum frequency. For relay output, it is limited within the range indicated in Code 3 specification.
Adjustable pulse width: 5 μsec. – 400 msec.

INSTALLATION
Power input
AC: Operational voltage range: rating ±10 %,
50/60 ±2 Hz, approx. 2 VA
DC: Operational voltage range: rating ±10 %,
ripple 10 %p-p max., approx. 2 W (80 mA at 24 V)
Operating temperature: -5 to +60°C (23 to 140°F)
Operating humidity: 30 to 90 %RH (non-condensing)
Mounting: Surface or DIN rail
Weight: 350 g (0.77 lb)

PERFORMANCE
Response time:
≤ 25 μsec. without filter
≤ 2 msec. with filter
≤ 20 msec. with relay contact pulse
Insulation resistance: ≥ 100 MΩ with 500 V DC
Dielectric strength: 2000 V AC @1 minute  (input to output to power to ground)

EXTERNAL VIEW
Note: This unit is factory calibrated according to the Ordering Information Sheet.

OUTPUT LOGIC

EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm (inch)

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM

M-System Co., Ltd.