0049-0117-100 DSP9612 Flash Poll Modem – User Guide
10/12/2011
Rev. F1
Page 28 of 44
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WARNING
Before you connect a voltage source,
observe the following power supply
voltage guidelines. Otherwise, you will
void your warranty if the wrong voltage
is applied.
Be sure the voltage source is within the
permitted ranges shown above.
Otherwise, your modem and any
attached devices may be damaged.
Customer-supplied cables must be
suitable for the site environmental
conditions.
Screw terminals on the power interface
accept 24 to 16 AWG. However, surge
protection is guaranteed only if the
ground wire is greater than 18 AWG
and if there is a solidly earthed ground
connection.
Be sure the power source is not
controlled by a wall switch, which can
be inadvertently turned off, shutting off
power to the modem.
Connecting an RS-232 Device
The modem back panel provides a female, 25-pin RS-232 connector that
accepts an attached RS-232 device (see Figure 2-1 on page 10). This
connector accepts a standard connection to a DTE (RTU) that conforms to
the pin assignments shown under “RS-232 (DTE) Interface”.
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