Quatech RS-422/485, MPA-200/300 user manual External Connections

11 EXTERNAL CONNECTIONS

When configured as a DTE, the MPA-200 uses a D-25 short body male connector (labeled CN2). When configured as a DCE, the MPA-200 uses a D-25 long body female connector (labeled CN1). Table 15 and Table 16 describe the pin out definitions for both connectors and Figure 6 and Figure 7 illustrate the pin-outs for each of the connectors..

Table 15 DTE Connector Pin Definitions

Pin	Signal	SCC Pin
1	CGND
2	+TXD	TXDA
3	+RXD	RXDA
4	+RTS	RTSA
5	+CTS	CTSA
6	+DSR	DCDB
7	DGND
8	+CD	DCDA
9	-RRCLK	RTXC
10	-CD	DCDA
11	-TTCLK	TRXCA
12	-RTCLK	TRXCB
13	-CTS	CTSA
14	-TXD	TXDA
15	+RTCLK	TRXCB
16	-RXD	RXDA
17	+RRCLK	TRXC
18	LLBK	COMM REG D5
19	-RTS	RTSA
20	+DTR	DTR/REQA
21	RLBK	COMM REG D4
22	-DSR	DCDB
23	-DTR	DTR/REQA
24	+TTCLK	TRXCA
25	TEST MODE	COMM REG D7

29 Quatech Inc., MPA-200/300 Manual