For RS-485 four wire applications, connect a wire jumper for the following:
 A. To use a transmitter termination resistor, connect a jumper between RES (B14) and TX+ (B15).
 B. To use a receiver termination resistor, connect a jumper between RES (A14) and RX+ (A15).
RS-232 Applications: (1C31169G01)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
A RI CTS RX/ DCD
B BAU SEL DSR RTS TX/ DTR
C BT. SEL COM SH Earth
GND
Earth
GND
RS-485 Four Wire Applications: (1C31169G02)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
A RES RX+ RXB BAU SEL RES TX+ TXC BT. SEL COM SH Earth
GND
Earth
GND
Notes
For a four wire RS-485 communications network, a termination resistor is recommended if the receiver
is located at the end of the communications link. A transmitter termination resistor is recommended if
the transmitter is at the end of the communications link and if the transmitter is tri-stated (disabled) when

对于RS-485四线应用，连接一个跨接导线，用于以下用途：
A.要使用变送器端接电阻器，请在RES（B14）和TX+（B15）之间连接一根跳线。
B.要使用接收器端接电阻器，请在RES（A14）和RX+（A15）之间连接一根跳线。
RS-232应用程序：（1C31169G01）
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
一个RI CTS RX/DCD
B BAU SEL DSR RTS TX/DTR
C.英国电信公司
GND
世界
GND
RS-485四线制应用：（1C31169G02）
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
A RES RX+RXB BAU SEL RES TX+TXC BT.SEL COM SH接地
GND
世界
GND
笔记
对于四线RS-485通信网络，如果接收器
位于通信链路的末端。如果需要，建议使用变送器端接电阻器
变送器位于通信链路的末端，如果变送器在