User`s manual

ProScale M150, M250 and all products with General Purpose LCD Digital Displays 36 of 44

Jumpers – Panel Mount Display

Although the ProScale display uses a keyboard-programming mode to enable and

configure features in the unit, several selection jumpers are located on the circuit board

for additional system configuration.

User configurable jumpers consist of three pins and a ‘shorting block’.

The center of these pins is ‘Common’. One end pin is labeled ‘A’ and the other end pin is

labeled ‘B’.

Panel Mount Display

Circuit Board

JP1 & JP2 Display Power

These jumpers set the display to operate on either 2D batteries or 24VDC.

To configure the display to operate on 24VDC power JP1 AND JP2 should be set to

position A THEY MUST BE SET ON THE SAME SETTING

To configure the display to operate on battery power JP1 AND JP2 should be set to

Position B THEY MUST BE SET ON THE SAME SETTING

JP3 Programming Enable/Disable

Entry to the programming mode of the ProScale display can be enabled or disabled

based on this jumper setting. To enable keyboard programming (default), install the

shorting jumper in position A. To disable keyboard programming, install the shorting

jumper in position B. When programming mode is disabled, the user cannot access the

programming functions via the Mode + 0 keys as described in the Section 4:

JP4 FOR FACTORY USE ONLY

JP1