Sutron TPEM070ZGW, User Manual

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P Line Maritim HMI Interfaces of the Device
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4.3.1.3 Transmitter Control
Switching between half-duplex and full-duplex is carried out by the DTR signal.
Full-duplex (DTR inactive / off):
The transmitter is always active and is not turned off on intermissions.
The receiver is always active.
Full-duplex (DTR active / on):
The transmitter is activated during the transmission. On intermissions, the trans-
mitter is highly resistive.
The receiver is disabled during the transmission. The operating device does not
receive the own transmit data at the receiver.
4.3.1.4 Diagnosis
Diagnostics LEDs are located on the rear of the operating device.
The diagnostic LEDs at the operating device have the following functions:
Table 4-6 Functions of the RS-422 / RS-485 diagnostics LEDs
Designation Color State Function
Rx Green Flashes Data transfer active
Tx Yellow Flashes Data transfer active