When is the external power supply needed on the SC902 cable?
• The external power supply is needed on ports that use active RTS/CTS RS-422 handshaking such as the following: • All Square D NIMs • Square D SFI-510 SY/LINK RS-422 port • SPE4-1D and SPE4-2D Ports 1, 2, 3, or 4 • AIM4-1D, AIM4-2D, and AIM4-2M Ports 1, 2, 3, or 4 • UCM4-D and UCM4-M Ports 1, 2, 3, or 4 • RM14K • All EPE5 RS-485 ports • All MEB ports • Many SY/MAX ports provide 5VDC so the external power supply is not needed on the units that follow: • All Square D PLCs (Model 100 or greater) • Every SPE4 Port 0 • Every AIM4 Port 0 • SERI • CAM500 • IBSM • Which serial cable is used to replace a Square D ICM200? • The SC902 may be used to replace the ICM200 in most situations but there are a few differences: • The ICM200 is optically isolated while the SC902 is not isolated. For an optically isolated system use the DDC2I-5 and a DC1 cable. • The ICM200 provides 4-channel RS-232<>RS-422 conversion which means RTS and CTS are active. The SC902 is a 2-channel converter and RTS and CTS ar
