Technical data

4.5.2 Connecting a Peripheral to the Asynchronous Modem Control
Port
You can connect peripherals that use EIA-232 connectors to the asynchronous
modem control port (port 2) on the back of the system unit. Alternatively,
the supplied EIA-232 to DEC423 adapter (H8575-A) allows you to connect
peripherals that use DEC423 connectors. To connect a peripheral to the
asynchronous modem control port, follow these steps:
1. If you are connecting a peripheral using EIA-232 cables, follow these
steps:
a. Set the on/off switch on the peripheral to the off (O) position.
b. Connect the 25-pin D-sub connector of the peripheral cable to the
asynchronous modem control port (see Figure 4–4).
c. If the connector has screws on either side, tighten them using a small
screwdriver.
d. Connect the other end of the peripheral cable to the correct port on the
peripheral.
e. Set the on/off switch on the peripheral to the on (|) position.
EIA-232 cables are available in the following lengths: 10 feet (BC22F-
10), 25 feet (BC22F-25), or 50 feet (BC22F-50). The peripheral you are
using may require a null-modem extension cable. See the peripheral
documentation or contact your Digital Sales representative for information
on the correct null-modem cable to use.
4–14 Hardware Options