Many end devices, including Rockwell Automation® hardened I/O products, use a different pin numbering convention for 4-pin mini connections than that used on physical media products
Physical key to ensure proper connection alignment
Polyvinylchloride (PVC) jacket resists oil and chemicals
Can provide power through only one pair of the four available contacts, so the other available pair can be used for single channel E-stop
Both conventions have the same color code going to the same spot but they use a different pin numbering designation
Sized to fit inside 1-in. conduit
E-stop T-ports and shorting plugs are red for easy identification
Gold plated contacts
Ratcheting coupling nut resists vibration
Highly pliable polyvinylchloride (PVC) jacket material
Watertight connections (NEMA 4, 6P; IP 67)