Surge protection for fieldbus transmitters

MTL claims the TP32 provides fieldbus installed transmitters a level of surge protection far in excess of the transmitter manufacturer transient protection devices, and it does it without additional wiring, conduit modifications, or other extras.

By Control Engineering Staff November 14, 2002

Hampton, NH – MTL claims the TP32 provides fieldbus installed transmitters a level of surge protection far in excess of the transmitter manufacturer transient protection devices, and it does it without additional wiring, conduit modifications, or other extras.

The TP32 is encased in an ANSI stainless steel housing and consists of solid state electronics and a gas-filled discharge tube capable of diverting 10kA impulses. Parallel connection allows interference-free passing of FOUNDATION fieldbus H1 communication protocols while ensuring transmitter electronics are never exposed to damaging electrical transients.

The TP32 has approvals for both intrinsically safe and explosion proof operation in all gas groups and apparatus temperature classifications to T6. Where transmitters are used in circuits suitable for Division 1, Zone 1 installations, the TP32 can be added without adversely affecting the level of safety. The TP32 has FM, CSA, and CENELEC approvals for use in hazardous locations and it meets IEC 61158-2:2000 and ANSI/ISA-50.02-2 1992 standards for 31.25 kbit/s systems as used in FOUNDATION fieldbus.

www.mtl-inst.com

MTL