ICS ELECTRONICS 4809A, Instruction Manual

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2.11.4 4899A Jumper Settings
The 4899A has internal jumpers for selecting RS-232 and RS-422/RS-485
signals. Figure 2-19 on the next page shows the jumper locations on the
4899A’s PC board. Table 2-8 lists the jumper functions.
The jumpers are accessed by removing the two screws on the rear panel
and sliding the unit out from the rear of its case. Jumpers W4, W5 and
W6 select the type of signals for the 4899A’s serial interface. For RS-232
serial signals, leave the jumpers in the ‘232’ position as shown in Figure
2-15. For RS-422 or RS-485 signals, set jumpers W4, W5 and W6 to the
‘422’ position. Do not change the other jumper positions.
Carefully slide the unit back into its case, fitting the PC board into the tracks
on each side of the case. Be sure the switch and LEDs are correctly aligned
before pushing the switch through the front panel.
Replace the two rear panel screws.
TABLE 2-8 4899A JUMPER SETTINGS
Jumper Function Factory
Setting
W1 Selects interrupt source CT/CV
CT/CV for 4899A and 4895, PRL for 4892
W2 Set for EPROM size. Not user changeable 512
W3 Write Enable. Installed enables saving setup parameters Installed
in EEPROM. Remove to block writes to configuration
tables
W4 RS-232/RS-422 signal selection Jumpers 232*
W5 232 for RS-232 signals 232*
W6 422 for RS-422 signals 232*
W7 LED signal jumpers CV
W8 CV/PRL for 4899A, CT for 4895 CV
W9 Default Jumper. Restores factory default settings when Open
installed. Same action as the CAL:DEFAULT command.
Notes: * Set RS485 to 1 for half-duplex operation or to 0 for full-duplex operation.