Verilink PRISM 3030 (34-00208.L) Product Manual - Manual (Page 91)

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Note: Only circuits serviced by the unit are listed.
The RS-232 interface is only recommended for data rates of 128 kHz and below.
The connector is a standard female DB-25.
All unbalanced bipolar inputs and outputs meet the physical and electrical specifications of
ITU V. 28.
Table A-5 RS-232 Interface Specifications
Characteristics Specifications
Line Drivers
Output Voltage
±
10 Volts maximum
Mark Voltage (Off) <
−
5 V (
±
0.5 V) into 3000
Ω
Space Voltage (On) > +5 V (
±
0.5 V) into 3000
Ω
Output Impedance 300
Ω
minimum
Short Circuit Current 12 mA maximum
Line Receivers
Input Voltage
±
25 V maximum
Load Impedance 3000
Ω
minimum
Mark Voltage (Off)
−
25 to 0 VDC
Space Voltage (On) + 2 to + 25 VDC
Table A-6 RS-449 /422 Interface Specifications
Characteristics Specifications
RS-449 /422 Drivers
Source Impedance <100
Ω
Differential Output Voltage between 2 to 6 VDC offset at 2.5 V (< +0.5V
and >
−
0.5 V) optional for MIL-STD-114
Short Circuit Current < 150 mA
Output Rise Time < 20 nanoseconds
RS-449 /422 Receivers
Impedance 100
Ω
terminated
Differential Input Voltage > +0.5 V or <
−
0.5 V
Data
Data Mark (binary 1 or OFF state) A terminal more negative than the B terminal
Data Space (binary 0 or ON state) A terminal more positive than the B terminal