Keyence Code Reader Power Supply and Communication Units Specifications

This document provides specifications, dimensions, and connection details for Keyence code reader power supply and communication units, including models N-R2, N-R4, N-UB, N-L20, BL-U1, BL-U2, N-42, and N-48. It covers interface types (RS-232C, RS-422A, RS-485, USB-COM, Ethernet), power ratings, environmental resistance, terminal block inputs/outputs, and mounting hole dimensions for these units.