System information

Installing Hardware Options
3-16
MicroVAX 3100 Models 88/98 User Information
MLO-013625
1
2
Figure 3-11 Installing the Synchronous Communication Option
3. Insert the screw through the module and into the I/O shelf as shown.
4. Connect the 100-pin-to-2x50-pin pigtail cables to the new synchronous
communications option.
5. Close the cover, connect the power cord and plug it into the wall outlet.
Asynchronous Communication Options
The MicroVAX 3100 88/98 systems support two different asynchronous communications
options. These options are as follows:
• DHW42-BB -- This asynchronous option provides 16 asynchronous DEC423 data-
line-only communications lines through two system ports. You can connect up to 16
peripherals using the MMJ ports on two harmonicas (H3104) that connect to the
option cables (BC16C-10).