Electrical Connections; Basic Information; Wiring Diagram - LAUMAS WTAB-R Installation And User Manual

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Table Of Contents

Table of Contents

- It is recommended that the power supply negative pole be grounded (WDESK-D, WINOX,

WTAB: connect the earthing system to the dedicated external terminal ).

- It is possible to supply up to eight 350 ohm load cells or sixteen 700 ohm load cells.

- For 4-wire load cells, make a jumper between EX- and REF- and between EX+ and REF+.

- Connect terminal "– SUPPLY" to the RS485 common of the connected instruments in the event

that these receive alternating current input or that they have an optoisolated RS485.

- In case of an RS485 network with several devices it is recommended to activate the 120 ohm

termination resistance on the two devices located at the ends of the network, as described in

section RS485 SERIAL CONNECTION.

- Option E/EC: selects 12 groups of 5 setpoint.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

INPUT

supply

5-24 Vdc

RS485

(1) ANALOG OUTPUT OPTION

2 3 4

Current output:

max load 300 ohm

Voltage output:

min load 10 kohm

5 outputs: settable setpoint or remote output management via protocol.

3 inputs: settable to have the following functions: NET/GROSS WEIGHT, SEMI-AUTOMATIC ZERO,

PEAK, PRINT or REMOTE CONTROL (see section OUTPUTS AND INPUTS CONFIGURATION).

(1) If the analog output is present (ANALOG OUTPUT OPTION) the following is no longer available:

▫ IN3 input

▫ OUT5 output

▫ E/EC options

WARNING: connect power supply specified on the plate found on the back of the instrument.

In 115 V and 230 V versions, terminals "+ SUPPLY" and "– SUPPLY" generate continuous voltage

at 24 Vdc only to be used as power supply for instrument inputs.