ES-1889 Rev.8
18YC
Rack-mounted DCS Signal Conditioners 18-RACK
CONTROL OUTPUT ISOLATOR
Functions & Features
• Accepting a 4 – 20m A DC input and providing an isolated 4 – 20 mA DC output
• Input from the Standard Rack connector can be monitored at the front terminals
• Opencircuit detection
MODEL: 18YC–AA–R
ORDERING INFORMATION
• Code number: 18YC-AA-R
INPUT
Current
A
: 4 – 20 mA DC (Input resistance 250 Ω)
OUTPUT
Current
A
: 4 – 20 mA DC (Load resistance 600 Ω max.)
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
: Connector
Input monitor
: M3.5 screw terminals (torque 0.8 N·m)
Output
: M3.5 screw terminals (torque 0.8 N·m)
Power input
: Supplied from connector
Screw terminal
: Nickel-plated steel
Isolation
: Input to output to power
Zero adjustment
: -5 to +5 % (front)
Span adjustment
: 95 to 105 % (front)
Opencircuit detection
: input current 0 mA when the output loop is open.
OUTPUT SPECIFICATIONS
The output goes below 0 % when the input is open.
INSTALLATION
Current consumption
: Approx. 50 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
: ±0.1 %
Temp. coefficient
: ±0.015 %/°C (±0.008 %/°F)
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
: 1500 V AC @ 1 minute
(output to input or power)
500 V AC @ 1 minute (input 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