ES-1836 Rev.9
18AC
Rack-mounted DCS Signal Conditioners 18-RACK
AC CONVERTER
Functions & Features
• Converting an alternating current/voltage into two standard process signals
• True RMS sensing
• Second channel output available at the front terminals and at the Standard Rack connector
Typical Applications
• Converting a large AC current in combination with a shunt resistor, or a narrow span AC voltage
MODEL: 18AC–[1]66–R
ORDERING INFORMATION
• Code number: 18AC-[1]66-R
Specify a code from below for [1].
(e.g. 18AC-A666-R)
[1] INPUT
Current
AA
: 0 – 10 mA AC (Input resistance 100 Ω)
AB
: 0 – 50 mA AC (Input resistance 20 Ω)
AC
: 0 – 100 mA AC (Input resistance 10 Ω)
AD
: 0 – 500 mA AC (Input resistance 1 Ω)
AZ
: Specify current (See INPUT SPECIFICATIONS)
(0 % input must be 0 mA.)
Voltage
A1
: 0 – 100 mV AC (Input resistance 10 kΩ min.)
A2
: 0 – 500 mV AC (Input resistance 10 kΩ min.)
A3
: 0 – 1 V AC (Input resistance 10 kΩ min.)
A4
: 0 – 5 V AC (Input resistance 200 kΩ min.)
A5
: 0 – 10 V AC (Input resistance 200 kΩ min.)
A6
: 0 – 120 V AC (Input resistance 200 kΩ min.)
A7
: 0 – 150 V AC (Input resistance 200 kΩ min.)
A8
: Specify voltage (See INPUT SPECIFICATIONS)
(0 % input must be 0 V.)
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.)
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)
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
Input waveform
: Up to 15 % of 3rd harmonic content
Overrange output
: 0 to 120 % at 1 – 5 V
Zero adjustment
: -5 to +5 % (front)
Span adjustment
: 95 to 105 % (front)
INPUT SPECIFICATIONS
Frequency
: 40 Hz min., 1 kHz max.
■
AC Current
: 0 – 1 A AC; input resistor incorporated
Minimum span
: 1 mA
Input resistance
Span 1 mA: 1 kΩ
Span ≤ 2 mA: 500 Ω
Span ≤ 5 mA: 200 Ω
Span ≤ 10 mA: 100 Ω
Span ≤ 20 mA: 50 Ω
Span ≤ 50 mA: 20 Ω
Span ≤ 100 mA: 10 Ω
Span ≤ 500 mA: 1 Ω
Span ≤ 1 A: 0.5 Ω
■
AC Voltage
: 0 – 250 V AC
Minimum span
: 50 mV
Input Resistance
Span 50 mV – 3 V : ≥ 10 kΩ
Span ≥ 3V : ≥ 200 kΩ
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 18BXx or 18KBXx
Weight
: 150 g (0.33 lb)
PERFORMANCE in percentage of span
Accuracy
: ±0.4 %
Temp. coefficient
: ±0.02 %/°C (±0.01 %/°F)
Response time
: ≤ 0.5 sec. (0 – 90 %)
Ripple
: 0.5 %p-p max. (100/120 Hz)
Line voltage effect
: ±0.1 % over voltage range
Insulation resistance
: ≥ 100 MΩ with 500 V DC
Dielectric strength
: 1500 V AC @ 1 minute
(input to output 1 or output 2 or power)
500 V AC @ 1 minute
(output 1 to output 2 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