Datum bc632D, User Manual

Page: 18 / 82

CHAPTER TWO
2-4 bc632D Wall Mount LED Display (Rev A) Datum Inc
2.1.5 JUMPER JP3 - RS-232/RS-485 SELECT FOR J3 PIN A1
If the display is to be connected directly to the RS-232 port of a computer, then leave the jumpers
between pins 1 and 2 of JP3. This routes pin A1 to an RS-232 receiver. If you are using the display as
part of a daisy-chained network, put the jumper on pins 2 and 3, which routes pin A1 to the (-) terminal
of an RS-485 transceiver.
Note : If you use the RS-232 input, be sure that JP6 is installed as described in Section 2.1.8.
2.1.6 JUMPER JP4 - SELECT EVENT OR 1PPS FOR BNC J2
Jumper JP4 is used to select the signal present on BNC connector J2. Normally, the jumper is
connected between pins 1 and 2, so that BNC J2 is used as a 1PPS output. To use BNC J2 as an
event input, move the jumper to pins 3 and 4.
1
2
3
4
1
2
3
4
1PPS Output
(Factory Setting)
Event Input
Figure 2-5
Jumper JP4 Settings
3 1 2
3 1 2
JP3
JP3
RS-232
(Factory Setting)
RS-485
Figure 2-4
Jumper JP3 Settings