ES-1880 Rev.12

18JF

Rack-mounted DCS Signal Conditioners 18-RACK

2-input MATH FUNCTION MODULE

(field-programmable)
Functions & Features
• Providing temperature or pressure compensation for a gas flow, and other arithmetic operations
• Microprocessor based
• Equation and parameters selectable on site via hand-held programmer PU-2x
• Loop testing
• Second channel output available at the front terminals and at the Standard Rack connector
Typical Applications
• Various flowmeters
• Adding two flows
• Ratio calculation
• Calculating average temperature

MODEL: 18JF–[1]66–R[2]

ORDERING INFORMATION

• Code number: 18JF-[1]66-R[2]
Specify a code from below for each of [1] and [2].
  (e.g. 18JF-666-R/3)
Use Ordering Information Sheet (No. ESU-1980). Default setting will be used if not otherwise specified.

[1] INPUT

Current
A: 4 – 20 mA DC (Input resistance 100 Ω)
Voltage
6: 1 – 5 V DC (Input resistance 1 MΩ min.)

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.)

[2] OPTIONS

Equation (Refer to the EQUATION table)
/1: Temperature compensation for DP flowmeter (ideal gas)
/2: Pressure compensation for DP flowmeter (ideal gas)
/3: Addition/subtraction
/4: Multiplication
/5: Division

EQUATION

Equation parameters
X0: output (%)
X1 to X2: input (%)
K0 to K2: gain ±29.999
A0 to A2: bias (%) ±299.99 %

RELATED PRODUCTS

• Programming Unit (model: PU-2x)
• PC configurator software (model: JXCON)
Downloadable at our web site.
A dedicated cable is required to connect the module to the PC.  Please refer to the internet software download site or the users manual for the PC configurator for applicable cable types.

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 (non-isolated between inputs)
Overrange input: Approx. -25 to +125 %
Overrange output: Approx. -10 to +120 %
Adjustments: Programming Unit (model: PU-2x); equation and parameters, square root extraction, zero and span, etc.
(Refer to the users manual of JXCON for the adjustments configurable with JXCON.)

INPUT SPECIFICATIONS

■ DC Current: Input resistor incorporated

INSTALLATION

Current consumption: Approx. 60 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: Input accuracy + output accuracy
Input accuracy: ±0.2 % (gain ≤ 1)
[±0.2 % × gain] with gain > 1
Output accuracy: ±0.2 %
Temp. coefficient: ±0.015 %/°C (±0.008 %/°F)
Response time: ≤ 1.2 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
(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