UPS devices  > APC pinouts
APC part#940-0625A APC part#AP940-0625A APC part#AP940-1525A

Compatible with :

  • Smart-UPS 5G(Serial)    SMX750, SMX1000, SMX1500
  • Smart-UPS 4.5G(Serial)    SMT750, SMT100, SMT1500, SMT2200, SMT3000

The jack in the UPS is actually a 10 pin RJ45 (RJ50). However, you can just as easily use a 8 pin RJ45 connector, which is more standard.

Pin
Number (RJ50)
Pin
Number (RJ45)
Pin
Name
Description

Pin Number (DB9F)

2 1 TxD Transmit 2
4 3 Frame GND Chassis Ground conn.frame
7 6 GND Signal Ground 5
8 7 RxD Receive 3

 

Above is on UPS side,

Basic Wiring Diagram

RJ50                                           DB9-F

2---------------------------------------2  RD

4--------------------------------------  Chassis GND (To connector frame)

7----------------------------------------5  GND 

8---------------------------------------3 TD

N/C                                               1 & 4 Shorted

N/C                                               7 & 8 Shorted

 

 

9 pin D-SUB male connector layout
9 pin D-SUB male connector
at the PC
10 pin RJ50 (10P10C) male connector layout
10 pin RJ50 (10P10C) male connector
at the UPS
According to 4 reports in our database (3 positive and 1 negative) this pinout should be correct.

Is this pinout
APC Smart-UPS 5G cable visual pinout:
APC Smart-UPS 5G cable diagram
click to enlarge
Source(s) of this and additional information: , http://www.fatblokeracing.org/ApcupsdCableConfiguration.shtml
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