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


Plug-in Signal Conditioners M-UNIT

(field-programmable; built-in excitation)

Functions & Features
• Scales input frequency
• Various outputs (open collector, voltage pulse, Noncontact AC/DC switch, RS-422 line driver)
• Built-in excitation
• Scaling factor is user-programmable by simply setting input and output frequencies via handheld programmer
• Isolation up to 2000 V AC
Typical Applications
• Scaling frequency signals from a rotary encoder

MODEL: JFR2–[1][2][3]–[4][5]

• Code number: JFR2-[1][2][3]-[4][5]
Specify a code from below for each of [1] through [5].
  (e.g. JFR2-4P1-K/Q)
• Use Ordering Information Sheet (No. ESU-1581). Default setting (table below) will be used if not otherwise specified.
• Specify the specification for option code /Q
  (e.g. /C01/S01)

INPUT – Field-selectable
Open collector
Mechanical contact
Voltage pulse
Two-wire current pulse
RS-422 line driver pulse

1: 5 V DC @ 120 mA
4: 12 V DC @ 60 mA
7: 24 V DC @ 25 mA

A: Open collector (max. 10 kHz)
M: 5V pulse (max. 10 kHz)
N: 12 V pulse (max. 10 kHz)
P: 24 V pulse (max. 10 kHz)
J: RS-422 line driver pulse (max. 10 kHz)
R: Noncontact AC/DC switch (max. 20 Hz)
( ) = Max. frequency

1: No conversion to one-shot
3: One-shot output (std. pulse width 400 μsec. (20 msec. for output signal R))
(Specify when optional pulse width is required.)

AC Power
K: 85 – 132 V AC
DC Power
S: 12 V DC
R: 24 V DC
V: 48 V DC
P: 110 V DC

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
/S01: Stainless steel

• Programming Unit (model: PU-2x)
• PC configurator software (model: JXCON)
Downloadable at M-System’s web site.
A dedicated cable is required to connect the module to the PC.  Please refer to the internet software download site or the users manual for the PC configurator for applicable cable types.

Construction: Plug-in
Connection: M3.5 screw terminals
Screw terminal: Chromated steel (standard) or stainless steel
Housing material: Flame-resistant resin (black)
Isolation: Input or sensor exc. to output to power
Input monitor LED: Red LED blinks according to the input.
Excitation adjustment: 5 – 24 V DC
Software programming: Programming Unit (model: PU-2x);
(Refer to the users manual of JXCON for the adjustments configurable with JXCON)
• Input range frequency
• Output range frequency
• Input span frequency
• Output span frequency
• Low-end cutout
• Non-uniform wave averaging
• Others
Adjustments: With DIP and Rotary switches.
• Pulse amplitude
• Input type
• Noise filter
(Refer to the instruction manual for details)
Input pulse sensing: DC coupled
Averaging non-uniform input waveforms: Input pulses are divided and then multiplied so that the output pulses are averaged.
Low-end cutout: No pulse output for certain low level of input frequency; 0.3 – 100 % adjustable; deadband 1 %

Excitation: Shortcircuit protection; approx. 440 mA (max.) at shortcircuit
Minimum pulse width time requirement: 5 μsec.; 50 msec. for mechanical contact (for both ON and OFF)
Minimum frequency span requirement: 20 % of the selected input frequency range
Open Collector & Mechanical Contact
Input requirements
(Excitation: Sensing)
5 V: Approx. 4 V / 1.0 mA
12 V: Approx. 9 V / 2.3 mA
24 V: Approx. 16 V / 4.7 mA
Resistance at ON : ≤ 200 Ω
Resistance at OFF : ≥ 200 kΩ
Detecting level: 1 V with 5 V excitation
2 V with 12 V/24 V excitation.
(Detecting voltage in the internal circuit)
For open collector or mechanical contact input, be sure to re-adjust the voltage back to 1 V (excitation 5 V) or 2 V (excitation 12 V/24 V) if it has been changed for other input types.
Detecting pulse edge: OFF (input monitor LED ON) to ON (input monitor LED OFF)
Voltage Pulse
: Square or sine
Input impedance: ≥ 10 kΩ
Pulse amplitude: 0.1 – 100 Vp-p (square)
1 – 100 Vp-p (sine or similar)
Max. voltage between input terminals: 50 V
Detecting level: 0 – 5 V (Detecting voltage in the internal circuit.)
Detecting pulse state: A pulse rise detected when the input voltage goes above the detecting level (input monitor LED ON); a pulse sink detected when it goes below the level (input monitor LED OFF).
Two-wire Current Pulse
Input resistance
: Receiving resistor 100 Ω
Input range: 0 – 25 mA
Minimum pulse amplitude: 10 mA
Detecting level: 0 – 5 V
(Detecting voltage in the internal circuit.)
Detecting pulse state: The input resistor (100 Ω) converts the current signal (0 - 25 mA) into 0 – 2.5 V. A pulse rise detected when the voltage goes above the detecting level (input monitor LED ON); a pulse sink detected when it goes below the level (input monitor LED OFF).
RS-422 Line Driver Pulse
Receiver: Conforms to RS-422

Output frequency: Input frequency × scaling factor (scaling factor = output span frequency / input span frequency)
Minimum frequency span requirement: 20 % of the selected output frequency range
■ Open Collector: 50 V DC @ 50 mA (resistive load)
Saturation voltage: 0.6 V DC
Maximum frequency: 10kHz
Voltage Pulse
H level
: Rating (5, 12 or 24 V) ±10 %
L level: ≤ 0.5 V
Load resistance: ≥ 1 kΩ (5V ), ≥ 2.4 kΩ (12 V), ≥ 4.8 kΩ (24 V)
Maximum frequency: 10 kHz
Noncontact AC/DC Switch: 120 V AC or 120 V DC @200 mA (resistive load)
ON resistance: 3 Ω
Maximum frequency: 20 Hz
Rise time: 5 msec.
Sink time: 3 msec.
RS-422 Line Driver Pulse
: Conforms to RS-422
Maximum frequency: 10 kHz

No conversion to one-shot: Duty ratio approx. 50 % (Fixed duty ratio even when the output frequency changes.)
One-shot Output: Preset pulse width ±20 %
Optional pulse width: 30 μsec. – 300 msec.

Power input
AC: Operational voltage range 85 – 132 V,
47 – 66 Hz, approx. 6 VA
DC: Operational voltage range: Rating ±10 %, or 85 – 150 V for 110 V rating; ripple 10 %p-p max.; Approx. 3.3 W (140 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: 400 g (0.88 lb)

PERFORMANCE in percentage of span
  Output 10 kHz range: ±0.2 %
  Output ≤ 1 kHz range: ±0.1 %
Response time
Input ≥ 10 Hz range
: 0.3 sec. + input cycle + output cycle
Input ≤ 1 Hz range: Two (2) input cycles + output cycle
Response time is defined as time required for the first output pulse to be provided for a step input (0 – 100 %).
Insulation resistance: ≥ 100 MΩ with 500 V DC
Dielectric strength: 2000 V AC @ 1 minute (input or sensor excitation to output to power to ground)


Refer to the instruction manual for detailed procedures.



M-System Co., Ltd.