ES-0418 Rev.2
18KVS
Rack-mounted DCS Signal Conditioners 18K-RACK
SIGNAL CONVERTER
Functions & Features
• Converts a DC input into a standard process signal using analog circuit
• DC isolation between inputs and outputs
• Module can be retracted without removing wiring for an insulation test
Typical Applications
• Isolation between control room and field instrumentation
MODEL: 18KVS–[1]6[2]–R
ORDERING INFORMATION
• Code number: 18KVS-[1]6[2]-R
Specify a code from below for each of [1] and [2].
(e.g. 18KVS-166-R)
• Special input range (For code 0)
[1] INPUT
Current
A
: 4 – 20 mA DC (Input resistance 250 Ω)
D
: 0 – 20 mA DC (Input resistance 50 Ω)
G
: 0 – 1 mA DC (Input resistance 1000 Ω)
H
: 10 – 50 mA DC (Input resistance 100 Ω)
Voltage
1
: 0 – 10 mV DC (Input resistance 10 kΩ min.)
2
: 0 – 100 mV DC (Input resistance 100 kΩ min.)
3
: 0 – 1 V DC (Input resistance 1 MΩ min.)
4
: 0 – 10 V DC (Input resistance 1 MΩ min.)
5
: 0 – 5 V DC (Input resistance 1 MΩ min.)
6
: 1 – 5 V DC (Input resistance 1 MΩ min.)
0
: Specify voltage (See INPUT SPECIFICATIONS)
OUTPUT 1
Voltage
6
: 1 – 5 V DC (Load resistance 2000 Ω min.)
[2] 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.)
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)
INPUT SPECIFICATIONS
■
DC Current
: Input resistor incorporated
■
DC Voltage
: 0 – 50 V DC
Minimum span
: 3 mV
Offset
: Max. 1.5 times span
Input Resistance
Span 3 – 10 mV : ≥ 10 kΩ
Span 10 – 100 mV : ≥ 10 kΩ
Span 0.1 – 1 V : ≥ 100 kΩ
Span ≥ 1 V : ≥ 1 MΩ
OUTPUT SPECIFICATIONS
With the input voltage code 3, 4, 5, 6 and current, the output goes below 0 % when the input is open.
INSTALLATION
Current consumption
:
Approx. 35 mA with voltage output
Approx. 65 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 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
: 500 V AC @ 1 minute (input to output 1 to output 2 to power to ground)
EXTERNAL DIMENSIONS unit: mm [inch]
TERMINAL ASSIGNMENTS
SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM