Omega CDTX-90 Manuel d'utilisateur télécharger pdf (Page 5)

page 3

CDTX-90-1 System Power/Loop Connections

Stand-alone application, no current loop used

Transmitter

Sys. Pwr.

Loop -

Sys. Pwr.

Loop +

AUX

Power -

AUX

Power +

Power Supply

DC 12 - 24 V

Power

Supply

Power

Supply

Connection to a PLC with built-in power supply

PLC

Power Supply

Ground

Power

Supply

Loop Input

4-20 mA

Loop Input

4-20 mA

Internal PLC

Connection

Connection to a PLC/Recorder, separate supply

PLC or Recorder

Loop Input

4-20 mA in

Loop Input

4-20 mA in

DC 12 - 24 V

Power

Supply

Power

Supply

Example: Two transmitters connected to PLC/Recorder

with separate power supply

Transmitter 2

DC 12 - 24 V

Power

Supply

Power

Supply

Transmitter 1

Transmitter

Sys. Pwr.

Loop -

Sys. Pwr.

Loop +

AUX

Power -

AUX

Power +

Transmitter

Sys. Pwr.

Loop -

Sys. Pwr.

Loop +

AUX

Power -

AUX

Power +

Sys. Pwr.

Loop -

Sys. Pwr.

Loop +

AUX

Power -

AUX

Power +

Sys. Pwr.

Loop -

Sys. Pwr.

Loop +

AUX

Power -

AUX

Power +

PLC or Recorder

Channel 1

4-20 mA in

Channel 1

4-20 mA in

Channel 2

4-20 mA in

Channel 2

4-20 mA in

Terminals

AUX power required for all CDTX-90 systems.

CDTX-90-1 Terminal connections

Output -

Output +

System Pwr

Loop -

System Pwr

Loop +

Sensr Gnd

(SHIELD)

Iso. Gnd

(BLACK)

Temp. IN

(WHITE)

Signal IN

(RED)

AUX

Power -

AUX

Power +

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.

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

Internal open-collector

output circuit

Output --

Output +

Isolation

15W

Terminals 1-2: Auxiliary power

Provides DC power to measurement

circuit. Required for all CDTX-90

systems.

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

1 2 3 4 5 6 7 8 9 10 ... 19 20

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Omega CDTX-90 Manuel d'utilisateur Page 5

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