Desc: APC UPS cables
File: apc.txt
Date: 12 February 2010
Auth: Arjen de Korte <adkorte-guest@alioth.debian.org

http://lists.alioth.debian.org/pipermail/nut-upsuser/2005-August/000118.html

Note that APC UPS serial cable part numbers follow a numbering scheme
where the "940-" prefix identifies them as cables.

       940-1000        straight through cable
       940-0103        null modem cable
       940-0020        Basic Signaling Cable (OB and kill power)
       940-0023        Simple Signaling Cable (OB only)
       940-LL24        Smart Signaling Cable
       940-0095        PnP Cable (see Apcupsd manual for diagram)
       940-0119        Simple Signaling Cable (OB and kill power)
       940-0127        RJ45-10P10C to USB Cable
       940-0128        Simple Signaling Cable for Back-UPS CS

"LL" represents the length:

       00      six feet
       NN      NN feet

The suffix letter represents a minor revision in physical design, or a
change of OEM, _not_ a change of wiring or pin-out, and all cables
differing only in this suffix letter are electrically interchangeable.
Note though the following quote from the APC Discussion Forums:  "At one
point there were a small number of revision D cables [940-0024D] that
had some shielding issues from the manufacturer that could maybe cause
[...] [spontaneous] self-tests)."


+-----------------------------------------------------------------+
|                                                                 |
|  Black APC 940-0024C Smart Signalling UPS Cable Wiring Diagram  |
|  This information is verified and tested to be 100% correct.    |
|                                                                 |
+-----------------------------------------------------------------+
|                                                                 |
|       DB9M(UPS)            2m Cable          DB9F(Computer)     |
|       ---------            --------          --------------     |
|                                                                 |
|         (SHELL)<---------+----//----+----------------<(SHELL)   |
|                          |          |                           |
|                          -          -                           |
|                         | |        | |                          |
|       CHASSIS 9<--------------//---------------------<5 SG      |
|                         | |        | |                          |
|           TXD 2<--------------//---------------------<2 RXD     |
|                         | |        | |                          |
|           RXD 1<--------------//---------------------<3 TXD     |
|                         | |        | |                          |
|                          -          -             +--<1 DCD     |
|                                                   |             |
|                                                   +--<4 DTR     |
|    NOTES:                                                       |
|    Cable type is shielded 28AWG.                  +--<7 RTS     |
|    The DB shells are connected                    |             |
|    to each other via the shield.                  +--<8 CTS     |
|                                                                 |
+-----------------------------------------------------------------+
|                                                                 |
|    Operation:     The UPS communicates with the Computer via    |
|    ordinary RS-232 serial protocol at 2400-8N1 with software    |
|    flow control. Jumpered pins in the DB9F connector are for    |
|    automatic or PNP cable identification by UPS software.       |
|                                                                 |
+-----------------------------------------------------------------+
|                                                                 |
|                           Male (pins)        Female (holes)     |
|   DB9 RS-232  PC                                                |
|   type connector          1         5         5         1       |
|  ----------------       _______________     _______________     |
|  Pinout numbering       \  . . . . .  /     \  o o o o o  /     |
|  looking into the        \  . . . .  /       \  o o o o  /      |
|  end of the cable         -----------         -----------       |
|                             6     9             9     6         |
|                                                                 |
|  NOTE: Solder a wire to the metal shell for use as a FRAME-GND  |
|                                                                 |
+-----------------------------------------------------------------+



+-----------------------------------------------------------------+
|                                                                 |
|  Gray APC 940-0020B Simple Signalling UPS Cable Wiring Diagram  |
|  This information is verified and tested to be 100% correct.    |
|                                                                 |
+-----------------------------------------------------------------+
|                                                                 |
|      DB9M(UPS)          2m Cable             DB9F(Computer)     |
|      ---------          --------             --------------     |
|                                                                 |
|        (SHELL)<-------+----//----+-------------------<(SHELL)   |
|                       |          |                              |
|      CHASSIS 9<--+    -          -                              |
|                  |   | |        | |                             |
|       COMMON 4<--+---------//------------------------<5 SG      |
|                      | |        | |                             |
|   POWER-FAIL 2<------------//------------------------<8 CTS     |
|                      | |        | |                             |
|     SHUTDOWN 1<------------//------------------------<4 DTR     |
|                      | |        | |                             |
|  BATTERY-LOW 5<------------//--------47K--+--47K--+--<7 RTS     |
|                      | |        | |       |       |             |
|                       -          -        |    E  |             |
|    NOTES:                                 |B  |<--+             |
|    RTS must be held at +V SPACE.          +---|                 |
|    TXD must be held at -V MARK.       2N3906  |---+--<1 DCD     |
|    All resistors are 5% 1/8W CF.               C  |             |
|    Cable type is shielded 28AWG.                 4K7            |
|    The DB shells are connected                    |             |
|    to each other via the shield.                  +--<3 TXD     |
|                                                                 |
+-----------------------------------------------------------------+
|                                                                 |
|    Operation:   The UPS communicates with the Computer via      |
|    the RS-232 handshaking lines only, and does not use any      |
|    serial protocol. Upon power fail, the UPS forces CTS to      |
|    -V MARK. When the battery is low, the UPS forces DCD to      |
|    +V SPACE via the transistor. When the Computer forces a      |
|    +V SPACE on DTR, the UPS will shut down and turn off.        |
|    Presence of the cable can be sensed by signaling on TXD      |
|    while monitoring DCD.                                        |
|                                                                 |
+-----------------------------------------------------------------+
|                                                                 |
|                           Male (pins)        Female (holes)     |
|   DB9 RS-232  PC                                                |
|   type connector          1         5         5         1       |
|  ----------------       _______________     _______________     |
|  Pinout numbering       \  . . . . .  /     \  o o o o o  /     |
|  looking into the        \  . . . .  /       \  o o o o  /      |
|  end of the cable         -----------         -----------       |
|                             6     9             9     6         |
|                                                                 |
|  NOTE: Solder a wire to the metal shell for use as a FRAME-GND  |
|                                                                 |
+-----------------------------------------------------------------+



+-----------------------------------------------------------------+
|                                                                 |
|  Gray APC 940-0095A Smart Signalling UPS Cable Wiring Diagram   |
|  This information is verified and tested to be 100% correct.    |
|                                                                 |
+-----------------------------------------------------------------+
|                                                                 |
|      DB9M(UPS)          2m Cable              DB9F(Computer)    |
|      ---------          --------              --------------    |
|                                                                 |
|        (SHELL)<-------+----//----+--------------------<(SHELL)  |
|                       |          |                              |
|      CHASSIS 9<--+    -          -                              |
|                  |   | |        | |                             |
|       COMMON 4<--+---------//-------------------------<5 SG     |
|                      | |        | |                             |
|  BATTERY-LOW 5<------------//--------47K--+--47K--+---<4 DTR    |
|                      | |        | |       |       |             |
|                                           |       +---<6 DSR    |
|                      | |        | |       |    E  |             |
|   NOTES:                                  |B  |<--+---<8 CTS    |
|   DTR must be held at +V SPACE. | |       +---|                 |
|   TXD must be held at -V MARK.         2N3906 |---+---<1 DCD    |
|   All resistors are 5% 1/8W CF. | |            C  |             |
|   Cable type is shielded 28AWG.                  4K7            |
|   The DB shells are connected   | |               |             |
|   to each other via the shield.        +----4K7---+---<3 TXD    |
|                      | |        | |    |                        |
|                                        |                        |
|                      | |        | |    |   1N4148               |
|     SHUTDOWN 1<------------//----------+----|<|-------<7 RTS    |
|                      | |        | |        K   A                |
|   POWER-FAIL 2<------------//---------------------+---<2 RXD    |
|                      | |        | |               |             |
|                       -          -                +---<9 RI     |
|                                                                 |
+-----------------------------------------------------------------+
|                                                                 |
|    Operation:   The UPS can communicate with the Computer       |
|    solely via the RS-232 handshaking lines, or via RS-232       |
|    serial protocol at 2400-8N1 with software flow control.      |
|    Upon power fail, the UPS forces RI to -V MARK. When the      |
|    battery is low, the UPS forces DCD to +V SPACE via the       |
|    transistor. When the Computer forces a +V SPACE on RTS,      |
|    the UPS will shut down and turn off. Jumpered pins in        |
|    the DB9F connector allow for automatic automatic or PNP      |
|    cable identification by UPS software.                        |
|                                                                 |
+-----------------------------------------------------------------+
|                                                                 |
|                           Male (pins)        Female (holes)     |
|   DB9 RS-232  PC                                                |
|   type connector          1         5         5         1       |
|  ----------------       _______________     _______________     |
|  Pinout numbering       \  . . . . .  /     \  o o o o o  /     |
|  looking into the        \  . . . .  /       \  o o o o  /      |
|  end of the cable         -----------         -----------       |
|                             6     9             9     6         |
|                                                                 |
|  NOTE: Solder a wire to the metal shell for use as a FRAME-GND  |
|                                                                 |
+-----------------------------------------------------------------+



+-----------------------------------------------------------------+
|                                                                 |
|  APC 940-1000 Straight Through cable                            |
|  Universal APC serial extension cable for use in conjunction    |
|  with an APC UPS cable. This cable is verified to work.         |
|                                                                 |
+-----------------------------------------------------------------+
|                                                                 |
|  DB9M to UPS cable     Shielded Cable       DB9F to Computer    |
|  -----------------     --- 28AWG ----       ----------------    |
|                                                                 |
|    (SHELL)<----+-------------//-------------+----<(SHELL)       |
|                |                            |                   |
|                -                            -                   |
|               | |                          | |                  |
|          1<------------------//------------------<1 DCD         |
|               | |                          | |                  |
|          2<------------------//------------------<2 RXD         |
|               | |                          | |                  |
|          3<------------------//------------------<3 TXD         |
|               | |                          | |                  |
|          4<------------------//------------------<4 DTR         |
|               | |                          | |                  |
|          5<------------------//------------------<5 SG          |
|               | |                          | |                  |
|          6<------------------//------------------<6 DSR         |
|               | |                          | |                  |
|          7<------------------//------------------<7 RTS         |
|               | |                          | |                  |
|          8<------------------//------------------<8 CTS         |
|               | |                          | |                  |
|          9<------------------//------------------<9 RI          |
|               | |                          | |                  |
|                -                            -                   |
| NOTE: The DB shells are connected to each other via the shield. |
|                                                                 |
+-----------------------------------------------------------------+
|                                                                 |
|                           Male (pins)        Female (holes)     |
|   DB9 RS-232  PC                                                |
|   type connector          1         5         5         1       |
|  ----------------       _______________     _______________     |
|  Pinout numbering       \  . . . . .  /     \  o o o o o  /     |
|  looking into the        \  . . . .  /       \  o o o o  /      |
|  end of the cable         -----------         -----------       |
|                             6     9             9     6         |
|                                                                 |
|  NOTE: Solder a wire to the metal shell for use as a FRAME-GND  |
|                                                                 |
+-----------------------------------------------------------------+