Black Box CL090A-F, Руководство пользователя

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8
HS RS-232
↔
CURRENT LOOP CONVERTER ACTIVE
For your convenience, the Converter has an externally accessible DCE/DTE
switch (see the diagram below). If the RS-232 device connected to the
Converter is a modem or multiplexor (or is wired like DCE), set the switch to
“DTE.” The setting causes the Converter to behave like Data Terminal
Equipment, transmitting data on RS-232 pin 2 and receiving data on pin 3.
If the RS-232 device connected to the Converter is a PC, terminal, or host
computer (or is wired like DTE), set the switch to “DCE.” This setting causes
the Converter to behave like Data Communications Equipment, transmitting
data on RS-232 pin 3 and receiving data on pin 2. Remember, the switch
setting is always from the point of view of the HS RS-232
↔
Current Loop
Converter Active, not the connected equipment.
3.2 Setting the Active/Passive Switch
The active/passive switch is used to control the mode of the receiver; it has no
control over the transmitter since the transmitter is fixed in the active mode.
To configure your HS RS-232
↔
Current Loop Converter Active receiver, you
first need to determine whether your device will be active or passive. If you are
going to use the HS RS-232
↔
Current Loop Converter Active receiver to
provide current for the loop, set the switch to the “active” position. If the HS
RS-232
↔
Current Loop Converter Active is to be used in an active loop, set
the HS RS-232
↔
Current Loop Converter Active receiver’s active/passive
switch to passive.
DCE DTE