Posted 3 Days Ago Job ID: 2110517 10 quotes received

Electrical Drafting - PLC upgrade

Fixed Price
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  Send before: September 13, 2025

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Engineering & Architecture Engineering (Mechanical / Chemical / Civil / Electrical)


Project Overview:We are replacing the existing PLC in an oil dispensing truck with a new Coolmay EX3G-8100H HMI/PLC controller (model EX3G-8100H 44MRT 10AD2DA-A4 A4-WP S(4T16R)), which includes:

  • 16 Digital Inputs (DI)

  • 16 Digital Outputs (DO)

  • 10 Analog Inputs (AI)

  • 2 Analog Outputs (AO)

  • Integrated touchscreen HMI

The new HMI/PLC will be mounted inside the truck near the door, replacing the existing PLC located inside the main control panel. The old PLC will be removed and replaced with a series of terminal blocks, which will interface the existing field devices to the new PLC via 6-pair cables running between the panel and the HMI/PLC.

Scope of Work

Produce a complete wiring diagram package based on the provided single-line diagram and photos of existing equipment. The final deliverables should include:

1. Termination Drawings

  • Digital Inputs (DI): All field sensors and switches connected to X00–X32.

  • Digital Outputs (DO):

    • Solenoid valves (Y00–Y32)

    • Pump run relays

  • Analog Inputs (AI): Flow meters (5 units), labeled AI-01 to AI-08.

  • Analog Outputs (AO): Any connected devices.

  • Power Supply Diagram: Including 24V DC power distribution and protection.

2. Cable & Connection Details

  • Show all connections from field devices → terminal blocks → PLC terminals.

  • Include 6-pair interconnection cables between panel and HMI/PLC.

3. Labeling Requirements

  • Digital Inputs: X00–X32

  • Digital Outputs: Y00–Y32

  • Analog Inputs: AI-01 to AI-08

  • Analog Outputs: AO-01 to AO-02

4. Drawing Format

  • Software: AutoCAD (DWG) or any package capable of producing DXF files.

  • Paper Size: A3 layout.

  • Deliverables:

    • Native DWG/DXF files

    • PDF copies of all drawings

Provided Information:

  • Single Line Diagram (SLD)

  • Photos of existing system and equipment

  • PLC model and I/O details

  • Field device list (from photos and notes)


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