When a process facility needed to add local displays to their Safety Instrumented System (SIS) loops, voltage consumption was the critical specification workers there had to scrutinize.
After considering multiple loop displays, the process engineers learned the Moore Industries SLD SIL 3 Capable Functional Safety Programmable Loop Display only consumes a maximum of 2.3Vdc, which is much more tolerant of line voltage drops than other loop displays.
In addition, the SLD’s dual conduit ports could facilitate input and output wiring when adding displays to loops, where most other loop displays only include one conduit connection port and therefore would require an additional junction box.
With the advantage of a lower loop voltage consumption and two cable entries/ports, the SLD decreased the installation cost and increased the voltage available for the safety level transmitter in the loop.
The following are some of the key attributes for users to consider:
- SIL 3 Capable Display
- Low 2.3Vdc Power Requirement
- 2-port field mount housing
- Loop Maintenance Diode Option
Low voltage SIL 3 capable indicator for level monitoring.
Source: Moore Industries