ES-1942 Rev.8
LDCA
Power Transducer Series L-UNIT
CT TRANSDUCER
(super-miniature size; self-powered;
average sensing; RMS calibrated)
Functions & Features
• Converting an alternating current from a current transformer into a standard process signal
• Minimum ripple
• No auxiliary power source required
• Isolation up to 2000 V AC
• High-density mounting
Typical Applications
• Centralized monitoring and control of motors, pumps or heaters by DCS
• Monitoring power line and power supply current
MODEL: LDCA–[1][2][3]
ORDERING INFORMATION
• Code number: LDCA–[1][2][3]
Specify a code from below for each of [1] through [3].
(e.g. LDCA-55/D/Q)
• Specify the specification for option code /Q
(e.g. /C01/S01)
[1] INPUT
Current
1
: 0 – 1 A AC (used within 0.1 – 1 A)
5
: 0 – 5 A AC (used within 0.5 – 5 A)
[2] OUTPUT
Current
G
: 0 – 1 mA DC (Load resistance 5000 Ω max.)
Voltage
3
: 0 – 1 V DC (Load resistance 2000 Ω min.)
4
: 0 – 10 V DC (Load resistance 20 kΩ min.)
5
: 0 – 5 V DC (Load resistance 10 kΩ min.)
[3] OPTIONS (multiple selections)
Mounting
blank
: Surface
/D
: DIN rail
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
TERMINAL SCREW MATERIAL
/S01
: Stainless steel
GENERAL SPECIFICATIONS
Construction
: Stand-alone; terminal access at the front
Connection
: M4 screw terminals (torque 1.2 N·m)
Screw terminal
: Nickel-plated brass (standard) or stainless steel
Housing material
: Flame-resistant resin (black)
Isolation
: Input to output
Input waveform
: Sine wave
Overrange output
: 10 – 120 % at 0 – 5 V
Span adjustment
: 95 to 105 % (front)
INPUT SPECIFICATIONS
Frequency:
50 or 60 Hz
Input burden:
2 VA
Overload capacity:
1000 % of rating for 3 sec., 200 % for 10 sec., 120 % continuous
Operational range:
10 – 120 % of rating
OUTPUT SPECIFICATIONS
INSTALLATION
Operating temperature
: -10 to +55°C (14 to 131°F)
Operating humidity
: 30 to 85 %RH (non-condensing)
Mounting
: Surface or DIN rail
Weight
: 150 g (0.33 lb) for surface mounting
170 g (0.37 lb) for DIN rail mounting
PERFORMANCE in percentage of span
Accuracy
: ±0.5 % (at 23°C ±10°C or 73.4°F ±18°F,
45 – 65 Hz)
Response time
: ≤ 2 sec. (0 – 100 % ±1 %)
Ripple
: 1 %p-p max.
Insulation resistance
: ≥ 100 MΩ with 500 V DC
Dielectric strength
: 2000 V AC @1 minute
(input to output to ground)
Impulse withstand voltage
: 1.2 / 50 μsec., ±5 kV
(input to output or ground)
CONNECTION DIAGRAM
EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]
MOUNTING REQUIREMENTS unit: mm [inch]