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4.2.2 Physical specifications of interface signals
The physical specifications of DPC-compatible interface signals consist of
electrical characteristics,
interface cable specifications, and connector pin
assignment specifications.
(1) Electrical characteristics
Signal levels must be within the following ranges:
Low level 0.0 to +4.0 v
High level
+2.4
to
+5.0
V
Note:
The signal levels above are at the interface
conn#ector.
Incorrect signals may be sent in power-on and
pow,er-off.
The interface signal driver and receiver must be the same as those shown
in Figure 4.5.
. Driver
5V
T
220R
Printer
--w-
-J-J-
To
usersys*sm
SW406
01
equivalent
I-
. Receiver
Figure 4.5 DPC-compatible interface signal driver and receiver
(2)
Interface cable
Twisted pair cables with a shield must be used for the
:interface
cable.
The cable length must be 50 feet (15
m)
or less.
4-6
B02P-1500-OOOlA...05