What it is, what it does
The 6AG1503-3CB00-2AA0 is a Siemens SIPLUS NET OLM/G12 V4.0 — an optical link module for PROFIBUS networks, coated for demanding environments. It delivers two BFOC ports at 860 nm multimode, supporting redundant ring or daisy-chain topologies over glass fiber. Rated supply is 24 VDC (18.8–28.8 V), drawing 0.2 A max. The module handles PROFIBUS from 9.6 kbps up to 12 Mbps, plus PA subnetwork at 45.45 kbps. Operational ambient range is -25…+60°C horizontally mounted, with IP40 protection. Dimensions are 112 x 39.5 x 74.5 mm (H x W x D).
CE marked, complies with EN 61000-6-4 (emissions Class A) and EN 61000-6-6 (immunity). No additional compliance certificates listed in the spec base.
Depth of 74.5 mm. PROFIBUS interface uses a 9-pin Sub-D socket. Power and signaling use a 5-pole terminal block; the measuring device uses a separate 2-pole block. Verify polarity on the 24 VDC supply input.