Storage Battery Systems, Inc. MANUAL PSC
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alarm
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Table 4
RS-232 Connections:
The RS-232 standard allows only a single point-to-point connection. This means only one device
may be connected to the serial port of a modem, computer or in this case the SBS
PCOM
card.
The cable needed for the RS-232 communication must have a maximum length of 15.2m (50 ft.),
with DB9 male connector at the
PCOM
card end and to other end on the mating device port
connector.
SBS
PCOM
card comes configured as RS-232 null modem so no other device will be needed for
connection with a DTE (
data terminal equipment
). See figure 1 cable connection.
Figure 1: cable connections
