
INSTALLATION
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2-7
SIG-00-07-11 SEPTEMBER 2012 (REVISED OCTOBER 2019)
Version No.: B.2
2.1.6.1
Laptop (Serial) Interface
The VIU front panel provides a standard RS232 interface connector labeled ‘Laptop (Serial)’ for
communication with a diagnostic terminal (laptop PC). This interface is a Data Communications
Equipment (DCE) port which uses a 9-pin female (DB-9) connector. The cable required to
connect this interface is a standard RS232 (straight-through) cable terminated in a male 9-pin
(DB-9) connector at the VIU end, and terminated in an applicable connector at the diagnostic
terminal (laptop PC). For example, the PC COM1 port may require a 9-pin (DB-9) or a 25-pin
(DB-25) connector.
CAUTION
SERIAL PORTS HAVE NO SECONDARY SURGE PROTECTION.
DO NOT CONNECT TO DEVICES OUTSIDE OF EQUIPMENT
ENCLOSURE.
CAUTION
SERIAL PORTS HAVE NO SECONDARY SURGE PROTECTION.
DO NOT CONNECT TO DEVICES OUTSIDE OF EQUIPMENT
ENCLOSURE.
Table 2-1 Laptop (Serial) Interface Connector Pin-outs (RS232)
PIN NUMBER
INPUT/OUTPUT
SIGNAL
•
1
•
•
-
•
2
•
O
•
Transmit Data
•
3
•
I
•
Receive Data
•
4
•
•
-
•
5
•
•
Signal Ground
•
6
•
•
-
•
7
•
I
•
Clear To Send
•
8
•
O
•
Request To Send
•
9
•
•
-
2.1.6.2
Serial Interface (Top Panel)
The VIU top panel provides an additional standard RS232 interface connector labeled ‘Serial’.
This is a general purpose communications port for connection to external devices. This interface
is a Data Terminal Equipment (DTE) port which uses a 9-pin male (DB-9) connector. Refer to
Table 2-2 Serial Interface Connector Pin-outs (RS232) – Top of Unit for pin outs.