ES-1837 Rev.8
18CE
Rack-mounted DCS Signal Conditioners 18-RACK
CT CONVERTER
Functions & Features
• Converting an alternating current from a current transformer into two standard process signals
• Minimum ripple
• True RMS sensing
• Second channel output available at the front terminals and at the Standard Rack connector
Typical Applications
• Centralized monitoring and control of motors, pumps or heaters by DCS
• Monitoring power line and power supply current
MODEL: 18CE–[1]66–R
ORDERING INFORMATION
• Code number: 18CE-[1]66-R
Specify a code from below for [1].
(e.g. 18CE-166-R)
[1] INPUT
Current
1
: 0 – 1 A AC
5
: 0 – 5 A AC
OUTPUT 1
Voltage
6
: 1 – 5 V DC (Load resistance 2000 Ω min.)
OUTPUT 2
Voltage
6
: 1 – 5 V DC (Load resistance 2000 Ω min.)
POWER INPUT
DC Power
R
: 24 V DC
(Operational voltage range 24 V ±10 %, ripple 10 %p-p max.)
GENERAL SPECIFICATIONS
Construction
: Rack-mounted; terminal access via screw terminals on the front and connector on the rear; terminal cover provided
Connection
Input
: M3.5 screw terminals (torque 0.8 N·m)
Output 1
: Connector
Output 2
: M3.5 screw terminals (torque 0.8 N·m)
and connector
Power input
: Supplied from connector
Screw terminal
: Nickel-plated steel
Isolation
: Input to output 1 to output 2 to power
Input waveform
: Up to 15 % of 3rd harmonic content
Overrange output
: Approx. 0 to 120 % at 1 – 5V
Zero adjustment
: -5 to +5 % (front)
Span adjustment
: 95 to 105 % (front)
INPUT SPECIFICATIONS
Frequency
: 50 or 60 Hz
Input burden
: 0.5 VA max.
Overload capacity
: 500 % of rating for 5 sec., 120 % continuous
Operational range
: 0 – 120 % of rating
INSTALLATION
Current consumption
: Approx. 35 mA
Operating temperature
: -5 to +55°C (23 to 131°F)
Operating humidity
: 30 to 90 %RH (non-condensing)
Mounting
: Standard Rack 18BXx or 18KBXx
Weight
: 150 g (0.33 lb)
PERFORMANCE in percentage of span
Accuracy
: ±0.4 %
Temp. coefficient
: ±0.02 %/°C (±0.01 %/°F)
Response time
: ≤ 0.5 sec. (0 – 90 %)
Ripple
: 0.5 %p-p max.
Line voltage effect
: ±0.1 % over voltage range
Insulation resistance
: ≥ 100 MΩ with 500 V DC
Dielectric strength
: 1500 V AC @ 1 minute
(input to output 1 or output 2 or power)
500 V AC @ 1 minute
(output 1 to output 2 to power)
1500 V AC @ 1 minute
(input or output or power to ground)
EXTERNAL DIMENSIONS unit: mm [inch]
TERMINAL ASSIGNMENTS
SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM