Model 9500 Central Station Receiver Installation/Operation Manual
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3.7.1
Printer Cable Pin-Outs
25 pin printer cables are a standard items at most electronic stores, however, if you create your
own cable, use the pin description in Table 3-1.
3.7.2
Com Ports 1 & 2
Com ports one and two are serial communication ports that (through a null modem cable) can
be used to communicate to other serial communication devices. Com port one is the only
serial communications port that can be used with the automation computer (see Section 3.10).
A standard null modem cable can be used to connect com port 1 or 2 to another serial device
such as a printer or a PC. Figure 3-14 and Figure 3-15 shown the pin-outs for a null modem
cable. See Section 5.4.3 to configure the Com Port 1 and Com Port 2.
Table 3-1: External Printer Cable Pin Description
9500 Pin #
Signal
Direction
Description
1
Data Strobe (Low)
Out
A low strobe pulse to read data in the
pulse width is greater than 0.5
microseconds.
2
Data Bit 1
Out
These signals represent information
of the first to eighth bits of parallel
data. Each signal is at high level
when the data is logic 1 and low
when it is logic 0.
3
Data Bit 2
Out
4
Data Bit 3
Out
5
Data Bit 4
Out
6
Data Bit 5
Out
7
Data Bit 6
Out
8
Data Bit 7
Out
9
Data Bit 8
Out
10
/AckNlg
In
A low pulse from the printer signals
the control that the printer is ready for
additional data.
11
Busy
In
A high level indicates that the printer
is busy.
12
Paper Empty
In
A high level indicates that the printer
is out of paper.
13
Select
In
A low level indicates the printer is
offline or in an error condition.
14
Not used
-
-
15
Not used
-
-
16
Logic ground
-
Logic ground for printer
17
Not used
-
-
18 to 25
Logic Ground
-
Ground return for data lines.
Summary of Contents for 9500
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