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Connect Tech Blue Heat/Net Sync User Manual
64 Revision 0.03
Pinouts
DB-25 Female Pinouts
DB25F
Line Mode
Pin #
Signal Name
V.28 in brackets
V.35
EIA-530
RS232
(V.28)
EIA-530A
X.21
(V.11)
14
TX+
V.35
[4]
V.11
Hi-Z
V.11
V.11
2
TX- (TX)
V.35
[4]
V.11
V.28
V.11
V.11
16
RX+
V.35
[4]
V.11
[1]
Hi-Z
V.11
[1]
V.11
[1]
3
RX- (RX)
V.35
[4]
V.11
[1]
V.28
V.11
[1]
V.11
[1]
23
DTR+
Hi-Z
V.11
Hi-Z
Hi-Z
V.11
20
DTR- (DTR)
V.28
V.11
V.28
V.10
V.11
19
RTS+
Hi-Z
V.11
Hi-Z
V.11
V.11
4
RTS- (RTS)
V.28
V.11
V.28
V.11
V.11
13
CTS+
Hi-Z
V.11
Hi-Z
V.11
V.11
5
CTS- (CTS)
V.28
V.11
V.28
V.11
V.11
21
DSR+
Hi-Z
V.11
Hi-Z
Hi-Z
V.11
6
DSR- (DSR)
V.28
V.11
V.28
V.10
V.11
10
DCD/RX_SYNC_IN+
[5]
Hi-Z
V.11
Hi-Z
V.11
V.11
8
DCD/RX_SYNC_IN-
[5]
(DCD)
V.28
V.11
V.28
V.11
V.11
11
TXC+
[2]
V.35
[4]
V.11
[2]
Hi-Z
V.11
[2]
V.11
[2]
24
TXC-
[2]
(TXC)
V.35
[4]
V.11
[2]
V.28
V.11
[2]
V.11
[2]
9
RXC+
[2]
V.35
[4]
V.11
[2]
Hi-Z
V.11
[2]
V.11
[2]
17
RXC-
[2]
(RXC)
V.35
[4]
V.11
[2]
V.28
V.11
[2]
V.11
[2]
15
(TXC)
NC
NC
V.28
NC
NC
12
RX_SYNC_OUT-
[6]
V.28
NC
V.28
NC
NC
22
RI (RI)
V.28
V.10
V.28
V.10
Hi-Z
18
TX_TRIGGER
[7]
[7]
[7]
[7]
[7]
7, 1
SR
SR
SR
SR
SR
SR
[1]
120 ohm resistor applied between the (+) and (-) signals.
[2]
120 ohm resistor applied between the (+) and (-) signals when the signal is an input.
[3]
This signal can be programmed to be a input or an output.
[4]
V.35 Termination Network is applied between (+) and (-) signals.
[5]
External Sync input used to enable or disable the receiver. This pin is used in external Sync
mode. A logical low will enable the receiver.
[6]
This output indicates that the Receiver has received a RX Sync character. It could also be used
as a general purpose I/O signal.
[7]
See the table titled Auxiliary Connector under TX_TRIGGER for details.
NC means DO NOT CONNECT.
Signal Description:
Mode
Equivalent Standard
Electrical
Typical Voltage
V.10
RS-423
Single ended
+/- 5VDC
V.11
RS-422 / RS485
Differential
1.5VDC to 4.5VDC
V.28
RS-232
Single ended
+/-12VDC
V.35
V.35
Differential
550mVDC
Table 9: DB-25 Female Pinouts