Cáp Điều Khiển UPS OEM APC with PowerChute Smart Signaling Serial Cable BLACK 940-0024C Serial 9Pin Extension Male to Female RS232 DB9 9 Pin M-F Length 1.8M

Cáp điều khiển UPS OEM APC with PowerChute Smart Signaling Serial Cable (BLACK) 940-0024C (Serial 9Pin Extension) Male to Female RS232 DB9 9 Pin M-F Length 1.8M

SKU  OEM  940-0024C

APC Part# 940-0024C, # 940-0024B, # 940-0024D or 940-1524(black cable). Compatible with most APC UPSs that have a DB9 serial port. Should work with APC PowerChute or Apcupsd(UPS Server for Linux)
Should be compatible with:

Back-UPS Pro    BP650, BP650S, BP650SC, BP420, BP420S, BP420SC, BP280S (also compatible with  940-0095B cable)
Smart-UPS 3G    SU420NET, SU620NET, SU700NET, SU1000NET, SU1400NET, SU2200NET, SU3000NET, SU2200XLNET, SU2200XLTNET, SU3000TNET, SU5000T, SU1400RMXL3U, SU2200RM3U, SU2200RMXL3U, SU2200RMXLNET, SU2200RMXLTNET, SU3000RM3U, SU3000RMNET, SU3000RMT3U, SU3000RMXL3U, SU5000, SU5000RMT5U
Smart-UPS 3.5G    SU700RM2U, SU1000RM2U, SU1400RM2U
Smart-UPS 3.6G(Serial)    SUA1000, SUA1500, SUA750XL, SUA1000XL
Smart-UPS 4.0G(Serial)    SUA2200, SUA2200RM2U, SUA3000, SUA3000RM2U, SUA3000RMT2U
Smart-UPS SC    SC420, SC620
Matrix    MX3000, MX5000, MX3000XR, MX5000XR

APC Part# 940-0024A, 940-0024B, 940-0024C, 940-0024D, 940-1524  cable scheme
According to APC forum, letter suffix is related to (change of?) manufacturer or revision, not wiring, and cables are electrically interchangable.

'Simple scheme' diagram further below looks correct for 940-0024 & A,B,C or D revisions and 940-1524 which is 15' long cable; and matches what viewed on a third-party site.

Simple scheme (APC 940-1524D cable)

At the PC end: pins 1,4 (DCD, DTR) shorted; pins 7,8 (RTS, CTS) shorted.
DB-9 shells are also connected.