Skip to main contentSkip to navigationSkip to footerIndicator Panel. 8 channels, 110V DC/AC. The M4600 provides flush mounted LED based indication with 6, 8 or 20 channels. Each channel can be used to indicate the state of one potential free contact. The indicator units are available with either negative or positive reference. An insert paper label provides the opportunity to print a description or instruction right next to the related channel LED. The indicator units are available for both DC of AC supply. Input signals can be +24 VDC, +48 VDC or +110 VDC. by Littelfuse | Gross Automation