The terminal blocks, listed below, fit all Pyromation series 31, 34, 49, 63, 91 and 800 series connection heads. The terminal blocks are provided with a steatite ceramic base, brass terminal pieces, and stainless steel screws. These terminal blocks are not rated for high voltage use, but can be used in temperature sensor or low voltage Class 2 circuits. Series 341 and 342 terminal blocks accept up to an #8 gauge wire, and the series 343 accepts up to a #12 gauge wire.

The DIN Style terminal blocks are 42 mm and 50 mm in diameter. The terminal blocks are supplied with a ceramic base. They can be provided in 2-, 3-, 4-, 6-, or 8-terminal configurations.