ES-5096 Rev.15

M2RTS

Super-mini Signal Conditioners Mini-M Series

RATIO/BIAS TRANSMITTER

(input bias)
Functions & Features
• Provides precise matching of DC control signals to final control elements in open- or closed-loop systems
• Easy ratio/bias setting with the front digital display
• Ratio adjustable from 0.1 to 4.00 or from -0.1 to -4.00; Bias adjustable to ±100 %
Typical Applications
• Ratio control for air/fuel flows or for two flows
• Gain calculation for manipulated variable from a controller
• Large scale signal span adjustment
 

MODEL: M2RTS-[1]-[2][3]-[4][5]

ORDERING INFORMATION

• Code number: M2RTS-[1]-[2][3]-[4][5]
Specify a code from below for each of [1] through [5].
  (e.g. M2RTS-S-6A-M2/CE/Q)
• Special input and output ranges (For codes Z & 0)
• Specify the specification for option code /Q
  (e.g. /C01/S01)

[1] OUTPUT CHARACTERISTICS

S: Proportional; ratio 0.1 to 4.00
R: Inverted; ratio -0.1 to -4.00

[2] INPUT

Current
A: 4 – 20 mA DC (Input resistance 250 Ω)
A1: 4 – 20 mA DC (Input resistance 50 Ω)
B: 2 – 10 mA DC (Input resistance 500 Ω)
C: 1 – 5 mA DC (Input resistance 1000 Ω)
D: 0 – 20 mA DC (Input resistance 50 Ω)
E: 0 – 16 mA DC (Input resistance 62.5 Ω)
F: 0 – 10 mA DC (Input resistance 100 Ω)
G: 0 – 1 mA DC (Input resistance 1000 Ω)
H: 10 – 50 mA DC (Input resistance 100 Ω)
K: 0 – 100 μA DC (Input resistance 1000 Ω)
GW: -1 – +1 mA DC (Input resistance 1000 Ω)
FW: -10 – +10 mA DC (Input resistance 100 Ω)
Z: Specify current (See INPUT SPECIFICATIONS)
Voltage
2: 0 – 100 mV DC (Input resistance 100 kΩ min.)
3: 0 – 1 V DC (Input resistance 1 MΩ min.)
4: 0 – 10 V DC (Input resistance 1 MΩ min.)
5: 0 – 5 V DC (Input resistance 1 MΩ min.)
6: 1 – 5 V DC (Input resistance 1 MΩ min.)
4W: -10 – +10 V DC (Input resistance 1 MΩ min.)
5W: -5 – +5 V DC (Input resistance 1 MΩ min.)
0: Specify voltage (See INPUT SPECIFICATIONS)

[3] OUTPUT

Current
A: 4 – 20 mA DC (Load resistance 750 Ω max.)
B: 2 – 10 mA DC (Load resistance 1500 Ω max.)
C: 1 – 5 mA DC (Load resistance 3000 Ω max.)
D: 0 – 20 mA DC (Load resistance 750 Ω max.)
E: 0 – 16 mA DC (Load resistance 900 Ω max.)
F: 0 – 10 mA DC (Load resistance 1500 Ω max.)
G: 0 – 1 mA DC (Load resistance 15 kΩ max.)
Z: Specify current (See OUTPUT SPECIFICATIONS)
Voltage
1: 0 – 10 mV DC (Load resistance 10 kΩ min.)
2: 0 – 100 mV DC (Load resistance 100 kΩ min.)
3: 0 – 1 V DC (Load resistance 1000 Ω min.)
4: 0 – 10 V DC (Load resistance 10 kΩ min.)
5: 0 – 5 V DC (Load resistance 5000 Ω min.)
6: 1 – 5 V DC (Load resistance 5000 Ω min.)
4W: -10 – +10 V DC (Load resistance 10 kΩ min.)
5W: -5 – +5 V DC (Load resistance 5000 Ω min.)
0: Specify voltage (See OUTPUT SPECIFICATIONS)

[4] POWER INPUT

AC Power
M2: 100 – 240 V AC (Operational voltage range 85 – 264 V,
47 – 66 Hz)
(90 – 264 V for UL)
DC Power
R: 24 V DC
(Operational voltage range 24 V ±10 %, ripple 10 %p-p max.)
R2: 11 – 27 V DC
(Operational voltage range 11 – 27 V, ripple 10 %p-p max.)
(Select ‘/N’ for ‘Standards & Approvals’ code.)
P: 110 V DC
(Operational voltage range 85 – 150 V, ripple 10 %p-p max.)
(110 V ±10 % for UL)

[5] OPTIONS (multiple selections)

Standards & Approvals (must be specified)
/N: Without CE or UL
/CE: CE marking
/UL: UL approval, CE marking
Other Options
blank: none
/Q: Option other than the above (specify the specification)

SPECIFICATIONS OF OPTION: Q (multiple selections)

COATING (For the detail, refer to our web site.)
/C01: Silicone coating
/C02: Polyurethane coating
/C03: Rubber coating (UL not available)
/C04: Polyolefin coating (UL not available)
TERMINAL SCREW MATERIAL
/S01: Stainless steel (UL not available)

GENERAL SPECIFICATIONS

Construction: Plug-in
Connection: M3 screw terminals (torque 0.8 N·m)
Screw terminal: Chromated steel (standard) or stainless steel
Housing material: Flame-resistant resin (black)
Isolation: Input to output to power
Overrange output: Approx. -10 to +120 % at 1 – 5 V
Ratio adjustment
Proportional: 0.10 to 4.00; 0.01 increments
Inverted: -0.10 to -4.00; 0.01 increments
Bias adjustment: -100 to +100 %; 1 % increments
Ratio/bias selector: Double-throw SW (front)
UP/DOWN control: Double-throw, momentary SW (front)
Equation: Xo = K (Xi + B) (proportional)
Xo = K (Xi + B) + 100 % (inverted)
where
  Xo : Output (%)
  K : Ratio
      Linear characteristics
      0.1 to 4.00 (proportional)
      -0.1 to -4.00 (inverted)
  Xi : Input (approx. -10 to +120 %)
  B : Bias (-100 to +100 %)
■ INDICATORS
Ratio/bias digital display: Red LED; 6.4 mm (.25”) 7 segment, 3 digits
Polarity indicator: Dual color (red/green) LED; Red with a positive set value; Green with a negative set value.
Power saving mode: Indicators turn off if the switches are untouched for 1 minute.

INPUT SPECIFICATIONS

■ DC Current:
Shunt resistor attached to the input terminals (0.5 W)
Specify input resistance value for code Z.
■ DC Voltage: -30 – +30 V DC
Minimum span: 100 mV
Offset: Max. 1.5 times span
•Input resistance
Span 0.1 – 1 V : ≥ 100 kΩ
Span ≥ 1 V : ≥ 1 MΩ

OUTPUT SPECIFICATIONS

■ DC Current: 0 – 20 mA DC
Minimum span: 1 mA
Offset: Max. 1.5 times span
Load resistance: Output drive 15 V max.
■ DC Voltage: -10 – +12 V DC
Minimum span: 5 mV
Offset: Max. 1.5 times span
Load resistance: Output drive 1 mA max.; at ≥ 0.5 V

INSTALLATION

Power Consumption
•AC:
 Approx. 3 VA at 100 V
 Approx. 4 VA at 200 V
 Approx. 5 VA at 264 V
•DC: Approx. 3 W
Operating temperature: -5 to +55°C (23 to 131°F)
Operating humidity: 30 to 90 %RH (non-condensing)
Mounting: Surface or DIN rail
Weight: 150 g (0.33 lb)

PERFORMANCE in percentage of span

Accuracy: ±0.2 %
  Ratio = 1, Bias = 0 % (proportional)
  Ratio = -1, Bias = 0 % (inverted)
Temp. coefficient: ±0.015 %/°C (±0.008 %/°F)
Response time: ≤ 0.5 sec. (0 – 90 %)
Line voltage effect: ±0.1 % over voltage range
Insulation resistance: ≥ 100 MΩ with 500 V DC
Dielectric strength: 2000 V AC @1 minute  (input to output to power to ground)

STANDARDS & APPROVALS

EU conformity:
EMC Directive 
  EMI EN 61000-6-4
  EMS EN 61000-6-2
Low Voltage Directive
  EN 61010-1
  Installation Category II
  Pollution Degree 2
  Input or output to power: Reinforced insulation (300 V)
  Input to output: Basic insulation (300 V)
RoHS Directive
Approval:
UL/C-UL nonincendive Class I, Division 2,
  Groups A, B, C, and D
  (UL 121201, CAN/CSA-C22.2 No.213-17)
UL/C-UL general safety requirements
  (UL 61010-1, CAN/CSA-C22.2 No.61010-1-12)

EXTERNAL VIEW

• How to Set the Ratio
Turn the Ratio/Bias Selector (C) to the top.
The Ratio/Bias Display (B) shows the current ratio (0.10 – 4.00).  Press UP/DOWN Control (D) until the display shows a desired set value.
The Polarity Indicator LED (A) is red when the set value is in positive range, green when in negative range.

• How to Set the Bias
Turn the Ratio/Bias Selector (C) to the bottom.
The Ratio/Bias Display (B) shows the current bias (0 – 100%).  Press UP/DOWN Control (D) until the display shows a desired set value.
The Polarity Indicator LED (A) is red when the set value is in positive range, green when in negative range.

• Fine Calibration
Equation:
  Xo = K(Xi + B) (proportional)
  Xo = K(Xi + B) + 100 % (inverted)
1) Calculate the input signal Xi which results in 0 % output.
Apply the calculated input and adjust with Zero Adj. (E) the output Xo to 0 %.
2) Calculate the input signal Xi which results in 100 % output.  Apply the calculated input and adjust with Span Adj. (E) the output Xo to 100 %.
3) Apply the calculated zero point input again and check the output Xo.
4) If the output has been shifted, go through (1) through (3) again.

The unit is factory set and calibrated to the following ratio and bias values.
Proportional characteristics: ratio (K) = 1, Bias (B) = 0 %
Inverted characteristics: ratio (K) = -1, Bias (B) = 0 %

EXTERNAL DIMENSIONS unit: mm [inch]

TERMINAL ASSIGNMENTS unit: mm [inch]

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM