Filter
Top Products
Technical Description
Omega Engineering OMG-COMM8-A Page 10
DB-25 Connector Pin Assignments
Signal Name Pin # Mode
GND Ground 7
TD Transmit Data 2 Output
RTS Request To Send 4 Output
DTR Data Terminal Ready 20 Output
RD Receive Data 3 Input
CTS Clear To Send 5 Input
DSR Data Set Ready 6 Input
DCD Data Carrier Detect 8 Input
RI Ring Indicator 22 Input
Figure 7 - DB-25 Connector Pin Assignments
DB-78 Connector Pin Assignments
Port # 1 2 3 4 5 6 7 8
TD 36 12 27 3 75 51 66 42
RD 37 11 28 2 76 50 67 41
RTS 17 31 8 22 56 70 47 61
CTS 16 32 7 23 55 71 46 62
DTR 35 13 26 4 74 52 65 43
DSR 18 30 9 21 57 69 48 60
DCD 38 10 29 1 77 49 68 40
RI 15 33 6 24 54 72 45 63
GND 34 14 25 5 73 53 64 44
Figure 8 - DB-78 Connector Pin Assignments