Datum bc632D, User Manual

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INSTALLATION AND SETUP
Datum Inc bc632D Wall Mount LED Display (Rev A) 2-5
1
2
3
4
1
2
3
4
Not Terminated
Terminated
Figure 2-6
Jumper JP4 Settings
2.1.7 JUMPER JP5 - TIME BUS TERMINATION
When you use the Digital Time or Multiplex Time protocols, you must terminate the ends of the network
with a 100
Ω
resistor. The resistor may be external or internal to the bc632D. To use the internal
terminating resistor, place the jumper on JP2 between pins 3 and 4. Otherwise place the jumper
between pins 1 and 2.
2.1.8 JUMPER JP6 - CONTROL BUS SELECT
Install the jumper on JP6 if RS-232 pins are being used, that is, if jumper JP3 is on pins 1 and 2. This
tells the display that it must enable the RS-485 drivers that are being driven from the controlling
computer. If you are not using the RS-232 pins or a controlling computer, then remove jumper JP6.
This will cause the display to keep those RS-485 drivers off.
Note : Only one display in a network can have its JP6 installed. Otherwise, control signals from
the computer be corrupted.
1 2
1 2
JP6
JP6
Using RS-232
(Factory Settings)
Not Using RS-232
Figure 2-7
Jumper JP6 Settings