APC SU1400XLT User Manual download pdf (Page 77)

APCUPSD SIMPLE-CUSTOM CABLE

Computer Side | Description of Cable | UPS Side

DB9f | DB25f | | DB9m | DB25m

4 | 20 | DTR (5vcc) *below | n/c |

8 | 5 | CTS (low battery) *below | <- 5 | 7

2 | 3 | RxD (no line voltage) *below | <- 3 | 2

5 | 7 | Ground (Signal) | 4 | 20

1 | 8 | CD (on battery from UPS) | <- 2 | 3

7 | 4 | RTS (kill UPS power) | -> 1 | 8

n/c | 1 | Frame/Case Gnd (optional) | 9 | 22

Note: the <- and -> indicate the signal direction.

When using this cable with apcupsd specify the following in apcupsd.conf:

UPSCABLE simple

UPSTYPE dumb

DEVICE /dev/ttyS0 (or whatever your serial port is)

Custom-RJ45 Smart Signalling Cable for BackUPS CS Models

If you have a BackUPS CS, you are probably either using it with the USB cable that is supplied or with the

940-0128A supplied by APC, which permits running the UPS in dumb mode. By building your own cable,

you can now run the BackUPS CS models (and perhaps also the ES models) using smart signalling and

have all the same information that is available as running it in USB mode.

The jack in the UPS is actually a 10 pin RJ45. However, you can just as easily use a 8 pin RJ45

connector, which is more standard (ethernet TX, and ISDN connector). It is easy to construct the cable by

cutting off one end of a standard RJ45-8 ethernet cable and wiring the other end (three wires) into a

standard DB9F female serial port connector.

Below, you will find a diagram for the CUSTOM-RJ45 cable:

CUSTOM-RJ45 CABLE

Signal Computer UPS UPS

DB9F RJ45-8 RJ45-10

RxD 2 ---------------- 1 2 TxD Send

TxD 3 ---------------- 7 8 RxD Receive

GND 5 ---------------- 6 7 Ground

FG Shield ---------------- 3 4 Frame Ground

The RJ45-8 pins are: looking at the end of the connector:

8 7 6 5 4 3 2 1

___________________

| . . . . . . . . |

| |

-------------------

|____|

The RJ45-10 pins are: looking at the end of the connector:

10 9 8 7 6 5 4 3 2 1

_______________________

1 2 ... 72 73 74 75 76 77 78 79 80 81 82 ... 114 115

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APC SU1400XLT User Manual Page 77