ES-1320 Rev.8

CVRTD

Plug-in Signal Conditioners M-UNIT

DC/RTD CONVERTER

Functions & Features
•Emulates the RTD resistance proportional to a DC signal
•High accuracy, high resolution
•Response time 0.5 seconds or less
•Output drive circuit with semiconductor switches ensures long life span
•Fixed output at power failure
Typical Applications
•Controls an RTD input device with a DC signal
 

MODEL: CVRTD-[1][2]-[3][4]

ORDERING INFORMATION

• Code number: CVRTD-[1][2]-[3][4]
Specify a code from below for each of [1] through [4].
  (e.g. CVRTD-64-R/Q)
• Temperature range (e.g. 0 – 100°C)
• Output resistance at power failure (e.g. 400 Ω)
  (Set to ‘Open’ if not otherwise specified.)
• Specify the specification for option code /Q
  (e.g. /C01/S01)

[1] INPUT

Current
A: 4 – 20 mA DC (Input resistance 250 Ω)
Voltage
6: 1 – 5 V DC (Input resistance 1 MΩ min.)

[2] OUTPUT

1: JPt 100 (JIS ’89) equivalent
3: Pt 100 (JIS ’89) equivalent
4: Pt 100 (JIS ’97, IEC) equivalent

[3] 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

[4] OPTIONS

blank: none
/Q: With options (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
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
Zero adjustment: -5 to +5 % (front)
Span adjustment: 95 to 105 % (front)

INPUT SPECIFICATIONS

DC Current:
Shunt resistor attached to the input terminals (0.5 W)

OUTPUT SPECIFICATIONS

Output: Resistance (unipolar)
Resistance range: Approx. 15 – 400 Ω
(The output may be uncertain immediately after the power is turned on or off.)
Maximum wattage: 0.07 W
Maximum excitation: 15 V DC
Maximum current: 10 mA
Resistance control: Resistance composed by switching resistors connected in parallel
Output devices: MOSFET switch + resistors
Output resolution: ≤0.05 Ω (up to 400 Ω)
Output resistance at power failure: 10 – 500 Ω selectable when ordering. Set to ‘Open’ if not otherwise specified.

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. 1.5 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: 300 g (0.66 lb)

PERFORMANCE in percentage of span

Accuracy: ±0.3 % or ±0.1 Ω, whichever is greater.
Accuracy of the output resistance at power failure: ± 3 %
Temp. coefficient: ± 0.02 %/°C (±0.01 %/°F) or [0.009 Ω + 0.00005 × Output Resistance (Ω)]/°C, whichever is greater.
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

EXTERNAL DIMENSIONS unit: mm [inch]

TERMINAL ASSIGNMENTS unit: mm [inch]

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM