WP 13626
FR 38668
HAM2&3 SEI System Wiring D1101576

J. Warner reported issues with the HAM2 CPS signals after doing in-rack measurements, alog 91892. The HAM ISI interface chassis connects to the CPS field box with a 3W3 power cable and DB25 cable. After some troubleshooting, we found the DB25 field connections to the field CPS boxes were incorrect, but the power cables were connected correctly. To correct for the wrong field connections, the DB25 cables were swapped in the CER (HAM ISI Interface chassis slots U42 & U41) during installation.

After testing, Jim connected the DB25 cables in the order one would expect. This caused Corner 1&3 and Corner 2 to be swapped, leaving the corner 3 signals unconnected. To avoid further confusion, the field cabling and rack cabling were corrected. Cables for both power and DB25 now follow the HAM2&3 SEI System Wiring D1101576.