PCI / ISA SDLC Adapter Pinout
SystexComm's PCI/ISA interface SDLC card is designed with a male 25 pin D-Sub Connector (RS-232), which follows the RS-232 standards defined by EIA/TIA.
RS-232 is an Active LOW voltage driven interface and operates at +12V to -12V where:
Signal = 0 (LOW) > +3.0V
Signal = 1 (HIGH) > +3.0V
Signal voltages in the rage of >-3.0V to +3.0V is regarded as 'dead area' and allows for absorption of noise. The power level on RS-232 pins is defined by TIA in terms of short circuit protection at 100mA.
Serial Pinouts on SystexComm SDLC adapter D-Sub connector (RS-232):
Pin No. |
Signal |
Description |
1 |
GND |
Ground |
2 |
SO4 |
Data Output |
3 |
SI4 |
Data Input |
4 |
RTS |
Ready To Send |
5 |
CTS |
Clear to Send |
6 |
DSR |
Data Set Ready |
7 |
GND |
Ground |
8 |
DCD |
Data Carrier Detect |
11 |
SELSTDBY |
Manufacture Test |
14 |
+12V |
|
15 |
TXCLK |
Transmit Clock |
16 |
-12V |
|
17 |
RDCLK |
Receiving Time Clock |
18 |
TEST |
Manufacture Test |
20 |
RTS |
Ready to Send |
23 |
RATESSEL |
Manufacture Test |
24 |
TSTCLK |
Test CLK Output |
etc |
- |
Unused |
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