Ercogener GenPro 425e - Serial Links RS232 C

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Descriptions and non-contractual illustrations in this document are given as an indication only.
ercogener reserves the right to make any modifications.
Dct_427_02
3.5 Serial links RS232C
By default, the GenPro 425e provides 2 serial links, but only one of them is active.
With the use of the port RS485, only the signals CT103/TX, CT104/RX, CT106/CTS,
CT105/RTS, CT109/DCD, CT125/RI remain available. The signals CT107/DSR and CT108-
2/DTR must not be connected (no physical link with the system port).
With the use of the second serial port RS232C, only the signals CT103/TX, CT104/RX,
CT106/CTS, CT105/RTS, CT109/DCD, CT125/RI remain available. The signals outputs
CT107/DSR and CT108-2/DTR have another assignment.
The use of the second serial port is linked to the embedded software application. It may be
not available with all configuration cases.
Table 15 : Electrical characteristics of RS232C signals
Characteristics
Symbols
Conditions
Min.
Typ.
Max.
Unit
Input Voltage – Range
V
INPUT
Input Voltage – Range
-25
+25
V
DC
Input Voltage – Low
V
IL
Input Voltage – Low
0.6
1.1
V
DC
Input Voltage – High
V
IH
Input Voltage – High
1.5
24
V
DC
Input Hysteresis
V
Hys
Input Hysteresis
0.5
V
DC
Input Resistance
R
in
Input Resistance
3
5
7
KΩ
Output Voltage
V
OUT
All transmitter outputs
loaded with 3 kΩ to
ground
±5
±5.4
V
DC
Transmitter Output
Resistance
R
OUT
300
50k
Ω
RS-232 Output Short-Circuit
Current
I
CC
±60
mA
3.5.1 Serial link RS232 by default
Table 16 : Description of pins of serial link RS232C
Signal
Connector
Sub-HD 15 pins
Pins N°
I/O
RS232
Standards
Description
CT109 / DCD
1
O
DCD
Data Carrier Detect
CT103 / TX
2
I
TX
Data transmission
CT104 / RX
6
O
RX
Data reception
CT107 / DSR
7
O
DSR
Data set ready
/ TX second serial link
CT108-2 / DTR
8
I
DTR
Data terminal ready
/ RX second serial link
CT106 / CTS
11
O
CTS
Ready to send
CT105 / RTS
12
I
RTS
Request to send
CT125 / RI
13
O
RI
Call indicator
GND
9
Ground