1827 IBM Serial UPS Conversion Cable

The #1827 is an IBM iSeries System Port/UPS Conversion Cable. The 1827 cable has 9 pin D-shell receptacle connectors on both ends. It converts an integrated system (serial) port to a UPS attach port. The 1827 cable is 0.14m (5.5 inches) long. The 1827 is a service processor communications port to uninterruptible power supply cable for the following IBM iSeries & Power System Models: 8203, 8204, 8234, 9117, 9405, 9406, 9407, 9408, 9409. Uninterruptible power supply communications is supported through a designated service processor communications port through the 1827 cable.

The service processor communications port supports two modes: RS-232 service processor communications port mode and uninterruptible power supply mode. Only one mode is supported at a time. The service processor will detect the presence of an uninterruptible power supply attached through service processor communications port through the 1827 cable when the server is started and set the control hardware to condition the signals for the uninterruptible power supply. The mode cannot be changed unless the system is started again.

Note: Serial ports are useless for AIX systems when an Hardware Management Console (HMC) is connected. However, the AIX platform connection to the UPS is managed by the FSP, and independent of the HMC being attached. No matter if an HMC is connected, the designated serial port for UPS attach will setup correctly in feature code 1827 is connected before power is applied to the server (UPS attach is detected on FSP IPL). The serial ports are not standard EIA-232 ports, therefore the UPS must be attached through the 1827 cable and a relay contact interface (such as IBM type 9910, feature code 2939) via the UPS to use the IBM platform managed solution.
To use a standard UPS manufacturer serial interface and UPS monitoring application for the AIX operating system, an asynchronous adapter (such as 2943 and 5723) must be installed and configured in AIX. The IBM i operating system only supports the IBM platform managed solution.

For the 9194, the 1827 convertor cable is not needed. Plug the System i uninterruptible power supply communications cable provided by the uninterruptible power supply supplier into the J14 port.

Both ends of the cable have a female 9-pin D-shell connector. The following figure shows the serial to uninterruptible power supply converter cable end (designated B) that plugs into the service processor communications port on the 9406-520, 9406-550, and the 9406-570. It has external threads that mate with the cable retention on the service processor communications port. The other end of the cable (designated A) plugs into the uninterruptible power supply vendor-supplied cable for System i communications. It has threads that mate with the cable external threads on the uninterruptible power supply.