Allen-Bradley 1746-OG16 SLC 500 16-Channel 5V DC TTL Output Module By wayne No Comments on Allen-Bradley 1746-OG16 SLC 500 16-Channel 5V DC TTL Output Module 3 Min Read Buy the Allen-Bradley 1746-OG16 SLC 500 digital DC output module. It features sixteen TTL outputs with a 5V DC voltage range for industrial control systems.