Omega manual CDTX-90-1 Terminal connections, CDTX-90-1 System Power/Loop Connections

CDTX-90-1 Terminal connections

Terminals 3 and 4: Loop Power 12-24 VDC ±10% system power and current loop output.

Max. loop impedance: 50 Ω max. @ 12 V 325 Ω max. @ 18 V 600 Ω max. @ 24 V

4 System Pwr

Loop -

System Pwr

3 Loop +

2 AUXPower -

AUX

1 Power +

Terminals 7-10: Sensor input 7 is conductivity input

8 is temperature input

9 is the isolated signal ground

10 is the sensor earth ground

		10	Sensr Gnd
			(SHIELD)
6	Output -	9	Iso. Gnd
			(BLACK)
		8	Temp. IN
			(WHITE)
5	Output +	7	(RED)Signal IN

Terminals 1-2: Auxiliary power

Provides DC power to measurement circuit. Required for all CDTX-90 systems.

Internal open-collector
output circuit		15Ω
	S
		Output	--
	D	Output	+
Isolation

Terminals 5-6: Open-collector Output

•A transistor output, programmable (see CALIBRATE menu) as High or Low setpoint with adjustable hysteresis and proportional pulse (to 400 pulses per minute maximum).

•May be disabled (Off) if not used.

CDTX-90-1 System Power/Loop Connections

Stand-alone application, no current loop used

Connection to a PLC with built-in power supply

Transmitter

PLC

Transmitter

Power Supply

Terminals

DC 12 - 24 V

Terminals

Terminals

Sys. Pwr.

4

Sys. Pwr.

4

-

Power Supply

-

Power

Ground

Loop -

Supply

Loop -

+

Power

Sys. Pwr.

3

+

Power

Sys. Pwr.

3

Loop +

Supply

Loop +

Supply

AUX

2

AUX

2

-

Loop Input

Power -

Power -

4-20 mA

AUX

1

AUX

1

+

Loop Input

Power +

Power +

4-20 mA

Internal PLC

Connection

Connection to a PLC/Recorder, separate supply

Example: Two transmitters connected to PLC/Recorder

with separate power supply

Transmitter 1

Transmitter

DC 12 - 24 V

Sys. Pwr.

4

DC 12 - 24 V

Loop -

-

Power

Sys. Pwr.

3

Power

Terminals

Supply

Loop +

Supply

+

Power

AUX

2

Power

Supply

Power -

Supply

Sys. Pwr.

4

AUX

1

Loop -

PLC or Recorder

Power +

PLC or Recorder

Sys. Pwr.

3

Loop +

-

Loop Input

Transmitter 2

-

Channel 1

4-20 mA in

AUX

2

4-20 mA in

Power -

+

Loop Input

Sys. Pwr.

4

Loop -

+

Channel 1

4-20 mA in

AUX

1

4-20 mA in

Sys. Pwr.

Power +

3

Loop +

-

Channel 2

AUX power required for all CDTX-90 systems.

AUX

2

4-20 mA in

Power -

+

Channel 2

AUX

1

4-20 mA in

Power +

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