ES-0416 Rev.2
18KMS
Rack-mounted DCS Signal Conditioners 18K-RACK
POTENTIOMETER CONVERTER
Functions & Features
• Constant voltage method has no effect on the total resistance value
• Minimal interaction between zero and span adjustments
• Module can be retracted without removing wiring for an insulation test
• Optional power switch
MODEL: 18KMS–66–R[1]
ORDERING INFORMATION
• Code number: 18KMS-66-R[1]
Specify a code from below for [1].
(e.g. 18KMS-66-R/S)
INPUT POTENTIOMETER
Total resistance 100 Ω – 10 kΩ
OUTPUT 1
Voltage
6
: 1 – 5 V DC (Load resistance 2000 Ω min.)
OUTPUT 2
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.)
[1] OPTIONS
Power Switch
blank
: None
/S
: With power switch
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
: 0 – 50 % of total resistance (front)
Span adjustment
: 50 – 100 % of total resistance (front)
INPUT SPECIFICATIONS
Minimum span
: 50 % of total resistance
Excitation
: Approx. 0.2 V DC
INSTALLATION
Current consumption
: Approx. 35 mA
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 VIEW
EXTERNAL DIMENSIONS unit: mm [inch]
TERMINAL ASSIGNMENTS
SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM