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SCSI Centronics 50 pin (Single-ended) pinout

hard drive connector

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50 pin Amphenol female connector layout
50 pin Amphenol female connector
at the controller & devices

use RJ-21 (or RJ21) registered jack standard connector, also known as a 50-pin telco connector, or an Amphenol connector.

Pin Name Dir Description
1-25GND---Ground
26DB0<->Data Bus 0
27DB1<->Data Bus 1
28DB2<->Data Bus 2
29DB3<->Data Bus 3
30DB4<->Data Bus 4
31DB5<->Data Bus 5
32DB6<->Data Bus 6
33DB7<->Data Bus 7
34PARITY<->Data Parity (odd Parity)
35GND---Ground
36GND---Ground
37GND---Ground
38TMPWR<->Termination Power
39GND---Ground
40GND---Ground
41/ATN<--Attention
42n/c-Not connected
43/BSY<->Busy
44/ACK<--Acknowledge
45/RST<->Reset
46/MSG-->Message
47/SEL<->Select
48/C/D-->Control/Data
49/REQ-->Request
50/I/O-->Input/Output
Note: Direction is Device relative Bus (other Devices)

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50 pin Amphenol male connector layout
50 pin Amphenol male connector
at the cable
Pinouts.ru > Hard drives connectors pinouts listing > Pinout of SCSI Centronics 50 pin (Single-ended) and layout of 50 pin Amphenol female connector and 50 pin Amphenol male connector
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