Comtrol DB25 - 78-Pin Connector for RS-422 Quadcable;Octacable Controllers

Building Basic Cables [Documentation number: 2000430 Rev B] 29
78-pin Connector for RS-422 Quadcable/Octacable Controllers
78-pin Connector for
RS-422 Quadcable/
Octacable
Controllers
The following table lists the pinouts for a 78-pin connector. The 78-pin connector is
available on the following RocketPort models:
• RocketPort PCI 422 quadcable, octacable and SMPTE.
• RocketPort Plus Universal PCI 422 quadcable, octacable and SMPTE.
Pin
RS-422 DTE
Function
RS-422 DCE
Function
Pin
RS-422 DTE
Function
RS-422 DCE
Function
140RxD5+TxD5+
2 RxD6+ TxD6+ 41 TxD6+ RxD6+
342
4RxD6- TxD6- 43
5 44 FRM GND 5
645RxD8-TxD8-
7 FRM GND 8 46 TxD7- RxD7
8 TxD6- RxD6- 47 FRM GND 7
9RxD7- TxD7- 48
10 RxD4+ TxD4+ 49
11 RxD3+ TxD3+ 50 RxD2+ TxD2+
12 TxD3+ RxD3+ 51 TxD1+ RxD1+
13 52
14 TxD4+ RxD4+ 53 RxD2- TxD2-
15 FRM GND 2 54
16 RxD1- TxD1- 55 TxD1- RxD1-
17 TxD2- RxD2- 56 TxD4- RxD4-
18 57 RxD4- TxD4-
19 FRM GND 4 58
20 FRM GND 3 59 RxD3- TxD3-
21 TxD5+ RxD5+ 60 TxD8+ RxD8+
22 61
23 62 TxD7+ RxD7+
24 FRM GND 6 63 RxD7+ TxD7+
25 RxD5- TxD5- 64 RxD8+ TxD8+
26 65
27 TxD8- RxD8- 66
28 TxD5- RxD5- 67
a
a. When grounded, Pin 67 indicates to the host adapter and software that it is a 4 port adapter instead
of an 8 port adapter.
The pins with no description are floating and have no connection.
Special
29 68
30 RxD1+ TxD1+ 69
31 TxD2+ RxD2+ 70
32 71
33 72
34 73
35 74
36 FRM GND 1 75
37 TxD3- RxD3- 76
38 77
39 78
Pin 1
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