Topcon FC-6000, Operator'S Manual

Page: 27 / 62

Chapter 3 Optional Features and Accessories
23
Configure pin 9 as input or power supply: Pin 9 is the Ring-
In signal input. It is rarely used by devices anymore and has
become a popular pin to provide a power source to an RS-232
device.
Select
Input if your device uses Ring-In signal or if it does not
need to be powered from the RS-232 port.
Select Power supply enabled to make pin 9 a power supply to
be used by the RS-232 device. The power supply is enabled
automatically without needing any interaction with the COM port.
Depending on the model, the power supply supplies either 5
VDC or 12 VDC.
„
Select DTR enables power supply to make pin 9 a power supply
(5 VDC or 12 VDC depending on model). The power supply
remains off until the user application opens the COM port and
asserts the DTR signal. When the DTR signal de-asserts, the
power supply turns off again.
„
Check Disable power supply during sleep to cause the power
supply to automatically turn off when the FC-6000 is in sleep
mode. This can allow the RS-232 device to conserve battery
power in sleep mode. If your app and/or RS-232 device
experiences communication failures when the FC-6000 enters or
exits sleep mode, then leave this option unchecked.