
DX4020-EXP | Installation Guide | EN | 6
Bosch Security Sys | 8/04 | F01U002192B
Figure 10: DIP Switch Settings for Address 14
OPEN
123456
78
1
2
=
=
1 - OPEN (UP) Position
2 - CLOSED (DOWN) Position
5. DX4020 LEDs
5.1 Ethernet/Serial LEDs
The DX4020 has four Bus/Serial status LEDs. See
Figure 11 and Table 2 for more information.
Use the P2 jumper to enable (jumper on) or disable
(jumper off) LED operation.
Figure 11: DX4020 Ethernet/Serial LEDs
1
3 4
2
1 - Ethernet/Serial LED Location
2 - P2 Jumper Location
3 - LED Enable (Jumper On) Position
4 - LED Disable (Jumper Off) Position
Table 2: DX4020 Bus/Serial Status LED
Functions
LED Name Color Function
1 BUS-XMIT Red Flashes when the data
bus sends a message
2 BUS-RCV Red Flashes when the data
bus receives a message
3 SER-RX Green Flashes every time a
message is received from
the Ethernet port
4 SER-TX Green Flashes when message is
sent to Ethernet port
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