ES-0426 Rev.8
18KDY
Rack-mounted DCS Signal Conditioners 18K-RACK
CURRENT LOOP SUPPLY
Functions & Features
• Powering a 4 – 20 mA DC current loop
• Shortcircuit protection
• Applicable to smart transmitters
• Usable as Isolator for 4 – 20 mA DC signals
• Module can be retracted without removing wiring for an insulation test
• Power switch optional
Typical Applications
• Various 2-wire transmitters
MODEL: 18KDY–A6[1]–R[2]
ORDERING INFORMATION
• Code number: 18KDY-A6[1]-R[2]
Specify a code from below for each of [1] and [2].
(e.g. 18KDY-A66-R/SL)
INPUT
Current
A
: 4 – 20 mA DC (Input resistance 276 Ω)
OUTPUT 1
Voltage
6
: 1 – 5 V DC (Load resistance 2000 Ω min.)
[1] OUTPUT 2
Current
A
: 4 – 20 mA DC (Load resistance 600 Ω max.)
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.)
[2] OPTIONS
Power Switch
blank
: None
/S
: With power switch
/SL
: With power switch (with green LED)
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)
and connector
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
Overrange output
: Approx. -10 to +120 % at 1 – 5 V
Zero adjustment
: -5 to +5 % (front)
Span adjustment
: 95 to 105 % (front)
SUPPLY OUTPUT
Output voltage
: 24 – 28 V DC with no load
Current rating
: ≤ 22 mA DC
•
Shortcircuit Protection
Current limited
: 35 mA max.
Protected time duration
: No limit
INPUT SPECIFICATIONS
■
DC Current
: Input resistor incorporated
OUTPUT SPECIFICATIONS
The output goes below 0 % when the input is open.
INSTALLATION
Current consumption
:
Approx. 65 mA with voltage output
(approx. 70 mA with /SL)
Approx. 95 mA with current output
(approx. 100 mA with /SL)
Operating temperature
: -5 to +55°C (23 to 131°F)
Operating humidity
: 30 to 90 %RH (non-condensing)
Mounting
: Standard Rack 18KBXx
Weight
: 150 g (0.33 lb)
PERFORMANCE in percentage of span
Accuracy
: ±0.1 %
Temp. coefficient
: ±0.015 %/°C (±0.008 %/°F)
Response time
: ≤ 0.5 sec. (0 – 90 %)
Line voltage effect
Supply output
: ±3 % over voltage range
Output signal
: ±0.1 % over voltage range
Insulation resistance
: ≥ 100 MΩ with 500 V DC
Dielectric strength
: 500 V AC @ 1 minute (input to output 1 to output 2 to power to ground)
EXTERNAL VIEW
EXTERNAL DIMENSIONS unit: mm [inch]
TERMINAL ASSIGNMENTS
SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM