Tyco Electronics Galaxy SC Controller J85501F-1
Issue 13 February 2001 Installation 3 - 41
signal may not be required by the connected equipment, and a
connection is not required by the controller.
• Signal Ground is the normal ground or return signal on an RS232
type interface. It is roughly at earth ground potential.
• Data Set Ready is the RS232 level signal from the connected
equipment telling the controller it is connected and ready to accept
data (within the confines of any hardware or software flow control).
The controller can be configured to monitor or ignore this signal. If
the connected equipment does not provide this signal, either
configure the controller to ignore this signal or connect this lead to
the Data Terminal Ready lead (pin 5). (Connecting DSR to DTR
will ensure proper operation even if the controller is accidentally
configured to monitor DSR).
• Request To Send is the RS232 level flow control signal to the
connected equipment saying the controller is ready to send data.
This signal is used when the controller is configured for hardware
handshaking. It may not be required by the connected equipment,
and a connection is not required by the controller.
• Clear To Send is the RS232 level flow control signal from the
connected equipment telling the controller it is ready to receive
data. This signal is used when the controller is configured for
hardware handshaking. If hardware flow control is not required by
the connected equipment, either configure the controller for
software or no flow control, or connect this lead to the Request To
Send lead (pin 8). (Connecting CTS to RTS will ensure proper
operation even if the controller is accidentally configured to use
hardware flow control.)
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