2
2-6
VME DLAN/DLAN+ Interface Module User’s Manual - August 1995
GFK-1044A
Jumper shown in 1-2 position.
Pin 3
Pin 2
Pin 1
Jumper shown in 2-3 position.
Pin 3
Pin 2
Pin 1
a47079
Figure 2-4. Selecting a DLAN Configuration Jumper Position
Selecting the DLAN Network Type
In addition to DLAN+, two types of DLAN networks are supported by version 1.04 and later
versions of the DLAN Module: optically isolated and RS-485. The DLAN network type is
selected by setting jumpers JP2, JP3, and JP4, as shown in Table 2-1. At the factory, these
jumpers are set to select the optically isolated network.
Table 2-2. Jumper Positions For Selecting DLAN Network Type
Jumper
Optically Isolated LAN
RS-485 LAN
JP2
JP3
JP4
1 – 2
1 – 2
1 – 2
2 – 3
2 – 3
2 – 3
Caution
If the DLAN modules is powered on while connected to an optically
isolated network and jumpers JP2, JP3, and JP4 are set to the 2–3
position, the external isolated power supply for the isolated network will
be damaged.