The ABB 2TLA020001R1000 JSHD2C type E is a JSHD Series safety enabling switch with a 3-position operator and IP65 ingress protection. In a pulp and paper mill that means it survives the steam and the chemicals on the wet end — the IP65 seal keeps liquor and washdown water out of the contacts. The three-position function (off / enable / off) is standard for teach pendants and manual intervention stations where the operator must hold the switch to keep the machine running; release or push-through both drop the safety chain.
What the IP65 rating means on the line
On a paper machine that covers the press section mist, the broke pulper splash, and the occasional hose-down during felt changes. Mount it on the machine frame or the pendant station — the 3-position action is positive-break, so the safety circuit sees a clean open when the operator lets go.