4‑channel proximitor I/O rear module with internal intrinsic safety barriers, for 3500 machinery monitoring rack, for proximity probe signal interface, 4 channels transducer‑power‑24VDC, built‑in internal termination & safety barrier, rack back‑plane powered, hot‑swap rear slot installation, green field wiring terminals, dimension 241×24.4×163 mm, operating temperature‑30℃~+65℃, comply with API‑670, CE certified, match with 3500/40M monitor front card
