MODEL: 18KDYH2
Rack-mounted DCS Signal Conditioners 18K-RACK
[2] OPTIONS (multiple selections)
Opencircuit detection
blank: none
CURRENT LOOP SUPPLY
(applicable to HART signal, opencircuit detection selectable)
Functions & Features
/B: Opencircuit detector (Only for HART signal)
Connector output polarity reversal
blank: none
• Powers a 4 – 20 mA DC current loop
• Isolates and relays HART signals
• Shortcircuit protection
/RE: Connector output polarity reversal (Only for HART signal)
• Opencircuit detection selectable
• Module can be retracted without removing wiring for an
insulation test
GENERAL SPECIFICATIONS
Construction: Rack-mounted; terminal access via screw
terminals on the front and connector on the rear; terminal
cover provided
Typical Applications
Connection
• 2-wire HART transmitters
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 +110 %
Zero adjustment: -5 to +5 % (front)
Span adjustment: 95 to 105 % (front)
Open-circuit detection: This function enables the input
device to detect open circuit of output circuit isolated from
the input circuit.
MODEL: 18KDYH2–A[1]–R[2]
ORDERING INFORMATION
• Code number: 18KDYH2-A[1]-R[2]
Specify a code from below for each of [1] and [2].
(e.g. 18KDYH2-A6A-R/B/RE)
Input current 0 mA when the output loop is open.
Photo MOSFET Relay ON Resistance; 3 Ω max.
SUPPLY OUTPUT
(across the terminals 1 – 2)
Output voltage: 24 – 28 V DC with no load
18 V DC at 20 mA
INPUT
Current
A: 4 - 20 mA DC (Input resistance approx. 250Ω)
Current rating: ≤ 22 mA DC
• Shortcircuit Protection
[1] OUTPUT 1 / OUTPUT 2
Current limited: 30 mA max.
Protected time duration: No limit
6A: 1 – 5 V DC (Load resistance 2000 Ω min.)
/ 4 – 20 mA DC (Applicable to HART signal, load resistance 600 Ω max.)*
A6: 4 – 20 mA DC (Applicable to HART signal, load resistance 600 Ω max.)*
/ 1 – 5 V DC (Load resistance 2000 Ω min.)
INPUT SPECIFICATIONS
■ DC Current: Input resistor incorporated
Input current: ≥ 0 mA
AA: 4 – 20 mA DC (Applicable to HART signal, load resistance 600 Ω max.)*
/ 4 – 20 mA DC (Load resistance 500 Ω max.)
* 250 Ω ±10% for HART communication
OUTPUT SPECIFICATIONS
The output goes below 0 % when the input is open.
Polarity of connector output is reversed with option code
/RE (with connector output polarity reversal).
POWER INPUT
DC Power
R: 24 V DC
(Operational voltage range 24 V ±10 %, ripple 10 %p-p max.)
18KDYH2 SPECIFICATIONS
ES-0430 Rev.3 Page 1/5
http://www.m-system.co.jp/