Quatech QSC(LP)-300 user manual RS-422/485 Peripheral Connection, connector definitions

6.8 RS-422/485 Peripheral Connection

The QSC(LP)-200/300 is a DTE device which connects to peripheral equipment through four female D-9 connectors. The onboard connector is a D-44 connector, which is brought out into four separate D-9 connectors via a custom cable assembly. The pin-out for the D-44 connector is listed in Figure 7. The serial port connections are listed in Figure 9.

Pin number	Signal	Pin number	Signal	Pin number	Signal
	description		description		description
1	nc	16	auxout3-	31	txd3+
2	gnd	17	rxd3+	32	rxd3-
3	txd3-	18	auxin3-	33	auxout3+
4	nc	19	auxin0+	34	nc
5	nc	20	auxout2-	35	txd2+
6	gnd	21	rxd2+	36	rxd2-
7	txd2-	22	auxin2-	37	auxout2+
8	auxin1+	23	auxout1-	38	nc
9	nc	24	rxd1+	39	txd1+
10	gnd	25	auxin1-	40	rxd1-
11	txd1-	26	auxin2+	41	auxout1+
12	nc	27	auxout0-	42	txd0+
13	gnd	28	rxd0+	43	rxd0-
14	txd0-	29	auxin0-	44	auxout0+
15	nc	30	auxin3+	X

Figure 7. D-44 connector definitions
	1
44
D-44 connector
Figure 8.	D-44 pin-out.

Quatech QSC(LP)-200/300 User's Manual 27