Dte/Dce Adjustment; Wiring The Switch Contact - Phoenix Contact PSI-MOS-RS232/FO 850 E Datasheet

11.3

DTE/DCE adjustment

You can use the DTE/DCE slide switch (9 in Figure 3 on
page 9) to cross the TxD and RxD cables internally. This al-
lows for easy adjustment to DTE or DCE interfaces.
– DTE: Connection to data terminal equipment
Set the switch to "DTE" (default setting for most applica-
tions).
– DCE: Connection to data communication equipment
Set the switch to "DCE."
If you do not know which type of interface is connected, you
can determine the right configuration by testing the
DTE/DCE slide switch.
103266_en_02
11.4

Wiring the switch contact

NOTE: Device damage
The maximum load capacity of the relay contact is
1 A at 18...32 V DC.
The device is equipped with a floating switching output for
error diagnostics (terminals 3 (11) and 4 (12)).
The switch contact opens on the relevant device in the event
of the following:
– Supply voltage failure
– An interrupt is detected on the fiber optic path
– System reserve of the fiber optic path not reached.
The switching output is an N/C contact. It can be connected
to a local digital input, e.g. on a PLC, for error detection.
When a topology is used, the individual switching outputs
can be connected to separate input points or the individual
contacts can be looped through to generate a group mes-
sage.
24 V DC 24 V DC
24 V 0 V 24 V 0 V
Figure 13 Individual and group message
PSI-MOS-RS232/FO 1300 E
24 V 0 V 24 V 0 V 24 V 0 V
PHOENIX CONTACT
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