Omega Products CDCN-91 User Manual

ELECTRONICS

Dual Channel Conductivity/ Resistivity Controller

CDCN-91 Series

Starts at

1075

Features

⻬ 2-Channel Input ⻬ Simultaneous Display ⻬ AC Line-Voltage

or DC Powered

⻬ Display and/or Control: µS, mS, PPM

or PPB (TDS), kΩ, MΩ, % Rejection, Difference, Ratio, °C or °F

⻬ 3 Fully Scalable

4 to 20 mA Outputs

⻬ Up to 4 Programmable Relays ⻬ Time Delay Relay Function ⻬ Proportional Pulse

Control Capability

⻬ Meets USP Requirements ⻬ Programmable Temperature

Compensation

⻬ Output Simulation for Complete

System Testing

⻬ Simple Push-Button Operation

⻬

⁄4 DIN, NEMA 4X (IP65) Enclosure

with Self-Healing Window

Application

⻬ RO/DI System Control ⻬ Demineralizer Regeneration and

Rinse

⻬ Scrubber, Cooling Tower

and Boiler Protection

⻬ Chemical Concentration ⻬ Rinse Tank Water Quality ⻬ Desalinization ⻬ Leak Detection ⻬ Aquatic Animal

Life Support Systems

⻬ Aquaculture ⻬ Environmental Studies

CDCN-91, $1075, shown actual size.

The CDCN-91 Series dual channel conductivity/resistivity controller is a twochannel input device equipped with three scalable 4 to 20 mA outputs and four programmable relays. A selector switch activates two open collector outputs in place of two of the relays for extraordinary output versatility. Dual input and advanced control capability, including percent rejection, difference and ratio calculations, together with the CDCE-91 Series conductivity sensors listed below, form the perfect measurement and control system for water treatment applications and more. Two versions are available: one accepts AC line-voltage, the other low voltage DC for power. The four-button keypad arrangement with intuitive software design is user-friendly, and the NEMA 4X (IP65) integrity of the front panel can be extended to the entire enclosure by using the optional rear cover kit.

Specifications

General

Compatible Sensors: CDCE-90 Series

standard conductivity/resistivity sensors

Operating Range:

Conductivity: 0.055 to 400,000 µS/cm Resistivity: 10 kΩ/cm to 18.26 MΩ/cm

(0.055 to 100 µS/cm) TDS: 0.001 to 999999 ppm or ppb (display limit) Temperature: PT1000: -25 to 120°C (-13 to 248°F)

Accuracy:

Conductivity/Resistivity:

±2% of reading

Temperature: ±0.5°C

Power Requirements:

100 to 240 Vac:

±10%, 50 to 60 Hz, 20 VA

11 to 24 Vdc: ±10% reg., 0.5A max

Display: Alphanumeric 2 x 16 LCD

Contrast: User selected, 5 levels Update rate: 1.5 seconds

Current Outputs: (3 each) 4 to 20 mA,

isolated, fully adjustable and reversible Max Loop Impedance: 150 Ω @ 12V, 450 Ω @ 18V, 750 Ω @ 24V

Update Rate: Approx. 100 mS Accuracy: ±0.03 mA @ 25°C, 24 Vdc

Open Collector Outputs: (2 each)

Isolated, 50 mA sink or source, 30 Vdc max pull-up voltage

Operational Settings: Hi, Lo, USP, Pulse, Off

Hysteresis: User adjustable Time Delay: 0 to 6400 seconds Maximum Pulse Rate:

400 pulses/minute

Alarm Contacts: (up to 4 each) SPDT Relays

Maximum Voltage Ratings: 5A @ 30 Vdc or 5A @ 250 Vac Operational Settings: Hi, Lo, USP, Pulse, Off

Hysteresis: User adjustable Time Delay: 0 to 6400 seconds Maximum Pulse Rate:

400 pulses/minute

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102

(4.0)

(2.2)

96 (3.8)

(3.8)

Panel Cutout

92 x 92 (+ 0.8, - 0)

3.6 x 3.6 (+0.031, -0)

Optional Rear Cover FP90-4X

Panel

gasket

Rear Cover

4-screws

RELAY 1

RELAY 2

RELAY 3

RELAY 4

N/CN/O COM

N/C

N/OCOM N/C

N/O

COM N/CN/O

COM

RELAY 3,4

OPEN 

COLL 3,4

- OPEN COLL 4

OPEN COLL 4

OPEN COLL 3

LOOP 2

LOOP 3



LOOP 1

SHLD

ISO GND

TEMP 1

SGNL 1

SHLD

ISO GND

TEMP 2

SGNL 2

POWER

OUTPUT OPTION

L



cable

Liquid Tig ht Connector (ordered separately)

quick-clip

gasket on

front side

of panel

panel

terminals

mounting bracket

RELAY 1

RELAY 2

RELAY 3

RELAY 4

N/CN/O COM N/C

N/OCOM N/C

N/O

COM N/C N/O

COM

RELAY 3,4

OPEN

COLL 3,4

- OPEN COLL 4

OPEN COLL 4

OPEN COLL 3

LOOP 2

LOOP 3

LOOP 1

SHLD

ISO GND

TEMP 1

SGNL 1

SHLD

ISO GND

TEMP 2

SGNL 2

POWER

OUTPUT OPTION

RELAY 1

RELAY 2

RELAY 3 RELAY 4

N/C N/O COM N/C N/O COM N/C N/O COM N/C N/O COM

RELAY 3,4

OPEN 

COLL 3,4

- OPEN COLL 4

+ OPEN COLL 4

- OPEN COLL 3

+ OPEN COLL 3

- LOOP 2

+ LOOP 2

- LOOP 3

+ LOOP 3



- LOOP 1

+ LOOP 1

SHLD

ISO GND

TEMP 1

SGNL 1

SHLD

ISO GND

TEMP 2

SGNL 2

POWER

OUTPUT OPTION

L

-



11 - 24V

0.5 A

L

-

3-8860.610A 4/00

100 - 240V 50-60Hz, 20VA

Enclosure

Rating: NEMA 4X (IP65) front and

back with optional NEMA 4X (IP65) rear cover kit

Materials:

Case: PBT Window: Polyurethane-coated

polycarbonate

Keypad: Sealed 4-key silicone rubber Weight:

CDCN-91AC: Approx. 581 g (20.5 oz) CDCN-91: Approx. 544 g (19.2 oz)

INSTALLATION ⻬ Front Panel provides

NEMA 4X (IP65) protection

⻬ Standard ⻬ 102 mm (4") mounting depth ⻬ Optional NEMA 4X (IP65) rear cover

kit with knockout ports for cable access

⻬ 158 mm (6.3") mounting depth with

optional rear cover installed

⁄4 DIN panel cutout

Dimensions: mm (in)

Panel mounting

bracket and panel

gasket are included.

Optional heavy-duty wall mount bracket CDCN-91-WMB, $52.

AVAILABLE FOR FAST DELIVERY!

To Order (Specify Model Number)

Model No. Price Description

CDCN-91 $1075 Conductivity/resistivity controller DC power

CDCN-91AC 1085 Conductivity/resistivity controller AC/DC power

Accessories

Model No. Price Description

FP90-4X $48 NEMA 4X (IP65) rear cover kit FPM-5000-LTCK 43 Liquid-tight kit for rear cover CDCN-91-WMB 52 Wall mount bracket FPM-5000-MB 33 Surface mount bracket FP90RC 18 RC filter kit for relays CDCE-90-001 320 Conductivity cell constant = 0.01 CDCE-90-01 320 Conductivity cell constant = 0.1 CDCE-90-1 320 Conductivity cell constant = 1.0 CDCE-90-10 550 Conductivity cell constant = 10.0 CDCE-90-20 670 Conductivity cell constant = 20.0

Comes complete with mounting bracket, panel gasket and operator’s manual. Additional cells available, see pages E-27 and E-28.

Ordering Example: CDCN-91 conductivity/resistivity controller DC power, with CDCE-90-1 conductivity cell constant, $1075 + 320 = $1395.

Order Online

Over 100,000 Products Available!

Optional surface mounting bracket FPM-5000-MB, $33.

Liquid tight connector kit 3 sets per kit, FPM-5000-LTCK, $43. Use with optional NEMA 4X (IP65) rear cover kit, FP90-4X, $48.

Note: This label appears on the side of the instrument case

To download information and to order Conductivity Instrument products online, visit omega.com

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