13

13

-SIG.

-EXC.

+SIG.

+EXC.

3

4

6

5

4-Wire Bridge Input

3

4

5

+

-

2-Wire Single

Ended Input

46

5

3

-EXC.

-SIG.

+SEN

+SIG.

+EXC.

-SEN

6-Wire Bridge Input

DEADLOAD COMPENSATION

In some cases, the combined deadload and liveload output may exceed the

range of the 24 mV input. To use this range, the output of the bridge can be offset

a small amount by applying a fixed resistor across one arm of the bridge. This

shifts the electrical output of the bridge downward to within the operating range

of the meter. A 100 K ohm fixed resistor shifts the bridge output approximately

-10 mV (350 ohm bridge, 10 V excitation).

Connect the resistor between +SIG and -SIG. Use a metal film resistor with

a low temperature coefficient of resistance.

BRIDGE COMPLETION RESISTORS

For single strain gage applications, bridge completion resistors must be

employed externally to the meter. Only use metal film resistors with a low

temperature coefficient of resistance.

Load cells and pressure transducers are normally implemented as full

resistance bridges and do not require bridge completion resistors.

Before connecting signal wires, the Input Range Jumper should be verified for proper position.

PAXT INPUT SIGNAL WIRING

3-Wire RTD

Thermocouple

2-Wire RTD

3

45

Sense Lead

Jumper

3

45

Sense Lead

RTD (Excitation)

3

45

+

-

CAUTION: Sensor input common is NOT isolated

from user input common. In order to preserve the

safety of the meter application, the sensor input

common must be suitably isolated from hazardous

live earth referenced voltages; or input common

must be at protective earth ground potential. If not,

hazardous live voltage may be present at the User

Inputs and User Input Common terminals.

Appropriate considerations must then be given to the

potential of the user input common with respect to

earth common; and the common of the isolated plug-

in cards with respect to input common.

PAXS INPUT SIGNAL WIRING

Sinking Logic

Terminal 8-10:

Terminal 7:

}

In this logic, the user inputs of the

meter are internally pulled up to +5 V

with 22 K resistance. The input is active

when it is pulled low (<0 .9 V).

+

(30V max.)

SUPPLY

V

8

7

-

10

9

4.3 USER INPUT WIRING

Before connecting the wires, the User Input Logic Jumper should be verified for proper position. If not using User

Inputs, then skip this section. Only the appropriate User Input terminal has to be wired.

Sourcing Logic

Terminal 8-10: + VDC thru external switching device

Terminal 7: -VDC thru external switching device

In this logic, the user inputs of the meter are

internally pulled down to 0 V with 22 K

resistance. The input is active when a voltage

greater than 3.6 VDC is applied.

7

8

9

10

Connect external switching device between

appropriate User Input terminal and User Comm.