Motorola MVME2603-1121A, Инструкция по установке и эксплуатации

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EIA-232-D Connections
C-4
C
Notes 1. A high EIA-232-D signal level is +3 to +15 volts. A low
level is
−
3 to
−
15 volts. Connecting units in parallel may
produce out-of-range voltages and is contrary to
specifications.
2. The EIA-232-D interface is intended to connect a terminal
to a modem. When computers are connected without
modems, one computer must be configured as a modem
and the other as a terminal.
Interface Characteristics
The EIA-232-D interface standard specifies all parameters for serial
binary data interchange between DTE and DCE devices using
unbalanced lines. EIA-232-D transmitter and receiver parameters
applicable to the MVME2603/2604 are listed in the following
tables.
The MVME2603/2604 conforms to EIA-232-D specifications. Note
that although the EIA-232-D standard recommends the use of short
interconnection cables not more than 50 feet (15m) in length, longer
Table C-2. EIA-232-D Interface Transmitter Characteristics
Parameter
Value
Unit
Minimum Maximum
Output voltage (with load resistance of 3000
Ω
to 7000
Ω
)
±
8.5 V
Open circuit output voltage
±
12 V
Short circuit output current (to ground or any
other interconnection cable conductor)
±
100 mA
Power-off output resistance 300 W
Output transition time (for a transition region
of -3V to +3V and with total load capacitance,
including connection cable, of less than
2500pF)
2
µ
s
Open circuit slew rate 30 V/
µ
s