Siemens ESM - Manual (Page 26)

Introduction
Industrial Ethernet OSM/ESM
22 C79000-Z8976-C068-10
Properties of the OSM TP22
Electrical ports 2 x 10/100 Mbps
autonegotiation/autocrossover ports
with TP connectors (RJ-45 jacks)
Optical ports 2 x 100 Mbps FO ports (full duplex)
BFOC female connectors
Maximum distance between two OSMs 3000 m (multimode graded-index fiber)
Maximum ring span with 50 OSMs 150 km
Digital Inputs 4 x DC 24V