PowerGate™ Modem User’s Manual
© 2001 Domosys Corporation
page 8 of 16
UM-PWG-0100-02
2.2.1
RS-232 Connector
The RS-232 connector is used for serial communication between a host and the PowerGate™
modem. The connector is a standard female DB-9.
The PowerGate™ modem’s serial port is 19200 Baud.
The RS-232 port specification is listed in Table 3 RS-232 DB-9 (female) Connector Pin
Assignment.
Table 3 RS-232 DB-9 (female) Connector Pin Assignment
Pin
Number
PowerGate™
modem
Signal Name
Description
Direction
1
DCD
Data Carrier Detect
This signal is used to detect if a RS-485
adapter is connected on the RS-232 connector.
- RS-232 mode
!
Leave this pin open
- RS-485 mode
!
Short this pin to ground
Input
2
Tx
Transmit data
Output
3
Rx
Receive data
Input
4
DSR
Data Set Ready (not used)
Not
connected
5
GND
Signal ground
-
6
DTR
Data Terminal Ready
This pin is connected to a 12V, 15mA current
limited source circuit to provide power to the
RS-485 converter option.
Output
7
CTS
Clear To Send
Not used
Shorted to
RTS
8
RTS
Request To Send
RTS and CTS are connected directly together
and are not used on the PowerGate™ modem
Not used.
Shorted to
CTS
9
RI
Ring Indicator (not used)
Not
connected
2.2.2
Power Input Connector
This connector is a polarized 8-pin DIN connector. It is used to provide power to the PowerGate™
modem and couple the PowerBus™ signal to the communication medium.
The AC-to-DC power adapter converts AC power (120, 240 V
AC
at 50/60 Hz) into a regulated 16
V
DC
. All power adapters include a PowerBus™ coupling circuit.
Note:
ONLY the power adapter provided with the PowerGate™ modem can be used with
the PowerGate™ modem.
