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Identify the terminal block and relay numbering for the DO signal as per Instrument wiring interconnection drawing and Electrical schematic wiring drawing. Inject 24V DC with current ranging from (50-100mA) to the Coil side of the DO signal.
3 Οκτ 2022 · Why is the IPR panel used? Interposing relay panels in industrial control are used to communicate the signals and status between the Automation system such as DCS & PLC and electrical modules in Machine control centre (MCC) such as motor control units, motors, pumps, lamps, and so on.
28 Οκτ 2014 · IRP houses Interposing Relays. The reason for using interposing relays are: 1) To electrically isolate two systems with different voltage levels (e.g., DCS @ 24V, MCC @ 220Vdc, or 230Vac 0r 110Vdc).
Interposing Relay is the auxiliary relay in plc which is used to isolate two different systems or devices because they have different voltage references.
The external ac connections of the directional over-current relays are shown in Figures 13, 14, and 15 (on page 28, page 29, and page 30). If no voltage polarizing source is to be connected to the IRD relay, short-circuit the voltage polarizing circuit at the termi-nals of the relay.
The type of considered relays inside the Interposing Relay Panels (IRP) panel shall be confirmed by the design Engineering Company, especially for checking on signals related to SIL-related loops (please see two types of different relays shown in Figure-6).
Interposing relays can be used to isolate control devices from dangerous load circuits. Interposing relays can ‘change’ a control (coil) voltage circuit into a higher or lower load voltage.
