ES-1871 Rev.7
18YS
Rack-mounted DCS Signal Conditioners 18-RACK
OUTPUT ISOLATOR
Functions & Features
• Converting a 1 – 5 V DC input into an isolated standard process signal
• Input from the Standard Rack connector can be monitored at the front terminals
Typical Applications
• Isolation between control room and field instrumentation
MODEL: 18YS–6[1]–R
ORDERING INFORMATION
• Code number: 18YS-6[1]-R
Specify a code from below for [1].
(e.g. 18YS-66-R)
INPUT
Voltage
6
: 1 – 5 V DC (Input resistance 1 MΩ min.)
[1] OUTPUT
Current
A
: 4 – 20 mA DC (Load resistance 600 Ω max.)
Voltage
6
: 1 – 5 V DC (Load resistance 500 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
: 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
Overrange output
: Approx. -10 to +120 % at 1 – 5 V
Zero adjustment
: -5 to +5 % (front)
Span adjustment
: 95 to 105 % (front)
OUTPUT SPECIFICATIONS
The output goes below 0 % when the input is open.
INSTALLATION
Current consumption
: Approx. 30 mA with voltage output
Approx. 50 mA with current output
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