17
Pin
Direction
Function
1
None
2
To EAD 02
TxD Transmitted data
3
From EAD 02
RxD Received data
4
To EAD 02
RTS Request to send
5
From EAD 02
CTS Clear to send
7
Ground
8
From EAD 02
DCD Data carrier detect
20
To EAD 02
DTR Data Terminal Ready
NOTE:
Please make sure that other pins are not connected, as there are other signals on
the connector. Improper wiring of these pins might damage the EAD 02.
7.2. Connector Pinout RS-232C Port 2
This connector is available on the EAD 02 External Models. Configuration is PC-like (9
pin male DB), but the signals are different due to DCE function.
Pin Direction Function
Pin
Direction
Function
2
To EAD 02
TxD Transmitted data
3
From EAD 02
RxD Received data
5
Ground
7.3. Line Interface Description
7.3.1. First Channel, RS-232C
The following paragraph addresses the standard EAD 02. The serial interface of the EAD
02 is designed to be used like a standard DCE (data communications equipment) modem.
EAD 02 transmits data received from the network to RxD (pin 3) and sends data received
on TxD (pin 2) to the network.
Hardware handshake is controlled by means of the signals RTS (pin 4) and CTS (pin 5,
EAD 02-driven). If a connection to/from the channel is active to a peer on the network,
the DCD line (pin 8) is set active. Connection establishment and disconnect can be
controlled with DTR (pin 20).