Cables

RS-232 Cables
For connecting the RMC75S, RMC75P or RMC100 to a computer or laptop with a DB9 serial port. For USB to RS-232 adapters, see this topic.

Allied Electronics
Null Modem Cable DB9 (F)/DB9 (F), 6 feet
http://www.alliedelec.com/search/productdetail.aspx?SKU=7960003

Newark
http://www.newark.com/spc-technology/spc19917/computer-cable-null-modem-6ft-gray/dp/83K3665