User's Manual

TS4000 Radio Modem User’s Manual Appendix A - Serial Ports 49
Pin Port Signal Direction Wire Color
[6]
Notes
9 1 Receive Data (RD) Output
10 1 Data Carrier Detect (DCD) Output
11 -- Ground (Power) --
12 -- Modem Power Input
13 2 Clear To Send (CTS) Output
14 2 Request To Send (RTS) Input
15 2 Data Set Ready (DSR)
Alt) Always in high state
Output
Output
[1] [3]
16 1 Not Connected
Alt) Data Set Ready (DSR)
--
Output
[1] [4]
[5]
17 1 Request To Send (RTS) Input
18 1 Data Set Ready (DSR)
Alt) Always in high state
Output
Output
[1] [3]
19 1 Clear To Send (CTS) Output
[1] These pins have multiple internal signals that they can be connected to. The
connection options are selected with internal jumper plugs (see Appendix F -
Internal Jumper Block).
[2] This pin is normally setup as the serial port Data Terminal Ready (DTR) line,
which is an input for DCEs (input to the TS4000). As an alternative, this pin
can be setup to feed DC power into the TS4000.
Caution: The use of the DTR pin for a DC power input connection is
non-standard. Therefore the TS4000 serial port must not be connected
to a standard serial device that drives the DTR pin (i.e. a PC). This
results in the power supply voltage of the TS4000 being shorted to the DTR
output of the host serial port, which could damage to the host device.
Therefore, when connecting the TS4000 to a PC for configuration, make sure
that the cable does not have a DTR (pin 4) connection.
[3] This pin is normally setup as the serial port Data Set Ready (DSR) line, which
is an output for DCEs (output of the TS4000). As an alternative, this pin can
be set to always be in the active high state. In this case the pin is internally
connected to +5 volts through a 1 K
Ω
resistor.
[4] For standard RS-232 ports this pin is the Ring Indicator (RI) line, which is an
output for DCEs (the TS4000). However, the TS4000 does not have an RI
line internally. Instead, this pin can be connected to the serial port Data Set
Ready (DSR) line which is an output for DCEs (output of the TS4000), or this
pin can be setup to provide DC power into the TS4000.
The use of this pin as a power pin is non-standard and therefore care should
be taken when connecting the TS4000 to standard serial devices. For most
serial ports this is not a problem because RI is a modem (DCE) output and
the TS4000 power supply mostly falls within the allowed voltage range for
RS-232 signals. Therefore the power voltage on this pin is interpreted as an
active RI signal. For systems that use the RI signal differently, or that cannot
operate with power on this pin, this pin should be disconnected between the
TS4000 and the host equipment.
[5] For the watertight version of the TS4000, the alternate jumper block option to
supply power to the modem via this pin should not be used due to the
Notes: