Power terminals for 24 V DC power - PR-23 - PR-23-AC - PR-23-AP - PR-23-GC - PR-23-GP - PR-23-M - PR-23-RP - PR-23-SD - PR-23-W

PR-23 Series User Guide

Document code
IM-EN-PR23
Revision
H
Language
English
Product
PR-23
PR-23-AC
PR-23-AP
PR-23-GC
PR-23-GP
PR-23-M
PR-23-RP
PR-23-SD
PR-23-W
Document type
User guide

The DC power is connected to a terminal stripe marked POWER in the lower right-hand corner of the motherboard. The 3 terminals are marked 31/+, 32/− and 33/(protective earth). The power terminal is directly connected to the exposed metal parts of the indicating transmitter DTR. Fuse voltage should be min. 48 V DC, max. size 4 A and fuse speed fast. Ensure that the protective fuse in the building system complies with local requirements.

The 24 V DC power to this terminal stripe must be supplied from a secondary circuit which is double or reinforced insulated from the mains supply within the limits for a limited-energy circuit (maximum 200 VA/U) according to IEC 61010-1.