Once the pin-out of the other device has been determined, a cable can be made to
connect the device to the LC module. The module’s transmit signal (RS-232) or
signal pair (RS-485) must be connected to the receive signal (RS-232) or signal pair
(RS-485) of the other device. Likewise, the LC receive signal or signal pair is
connected to the transmit of the other device.
The Ovation LC/Modbus interface does not require any of the control signals (that
is, RTS, CTS, DTR, DSR, DCD, or RI) to be connected for proper operation. Some
field devices will require logically complementary pairs of control signals to be
looped back (for example, the device’s own Request To Send signal connected to
satisfy its Clear To Send signal).
Generic RS-232 and RS-485 cables are shown in Figure 2-2 and Figure 2-3. Many

一旦确定了另一个设备的引脚，就可以制作一条电缆
将设备连接至LC模块。模块的传输信号（RS-232）或
信号对（RS-485）必须连接到接收信号（RS-232）或信号对
另一个设备的（RS-485）。同样，LC接收信号或信号对
连接到其他设备的传输。
Ovation LC/Modbus接口不需要任何控制信号（即
is、RTS、CTS、DTR、DSR、DCD或RI）连接，以便正常运行。一些
现场设备需要逻辑互补的控制信号对
环回（例如，设备自身发送连接到的信号的请求）
满足其清晰的发送信号）。
通用RS-232和RS-485电缆如图2-2和图2-3所示。许多的