The DTK-TSS1 includes a DTK-120SRD for AC power surge protection with remote monitoring, and a 5-position hardwired base to add loop circuit protection. Installed in a NEMA 1 steel enclosure. Protects 120VAC power with dry contacts for remote monitoring of surge protection status. Hard-wired base for 2MHLP/2MHLPB modules to protect up to 10 SLC, NAC, IDC and PIV circuit pairs (2MHLP modules sold separately). Space for expansion, protect up to 8 additional data/signal pairs by adding a DTK-4MB Base.