Illustrative diagram library

Matched reference diagrams for each documented loop

When you generate a document, Loopdraft docks a matched illustrative diagram beside it. Every diagram is a schematic reference — clearly marked illustrative and not for construction — to confirm structure before a competent engineer produces the certified drawing.

01

Control loop diagram

Sensor → controller → actuator with setpoint, PID block and feedback path, plus a symbol legend.

SP / PV / COPID blockillustrative
Illustrative control loop diagram with sensor, controller, setpoint and actuator with feedback
02

P&ID snippet

ISA-style process and instrumentation fragment: vessel, transmitter, indicating controller and control valve.

ISA symbolstag tablenot certified
Illustrative P&ID snippet with a level tank, transmitter and control valve
03

I/O terminal wiring sketch

Terminal block layout grouping DI/DO/AI/AO points with tags, signal types and 4–20 mA notes.

DI · DO · AI · AO24 VDCillustrative
Illustrative terminal block wiring sketch with DI, DO, AI and AO points
04

Control panel general arrangement

Concept enclosure layout placing PLC, 24 VDC PSU, breakers, control relays and interface I/O relays.

PLC · PSUconcept layoutnot fabrication
Illustrative control panel general arrangement concept with PLC, PSU, breakers and relays
05

Duty / standby pump schematic

Two-pump set with hand-off-auto selector, low-level cutout and run-hours changeover, with legend and title block.

HOA selectorLSL cutoutrun-hours
Illustrative duty-standby pump schematic with hand-off-auto selector and low-level cutout
06

Conveyor start sequence

Three conveyor segments with motors, run-signal interlocks and a step table for cascade start.

3 segmentsrun interlocksstep table
Illustrative three-segment conveyor start-sequence diagram with motors and interlocks
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