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DDC Control System

Assembly

The direct-digital controller and sensor set that runs the unit: duct-pressure fan control, discharge-temperature coil sequencing, economizer logic, and BACnet integration. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

DDC Control System parts and their functions

8 top-level parts · 219 parts in total · full bill of materials below
DDC Control System parts diagram: 1 DDC controller board, 2 duct temperature sensor, 3 humidity sensor, 4 pressure sensor, 5 coil valve & actuator, 6 relay, 7 wire bundle, 8 connector. 219 parts in 8 top-level items.
DDC Control System parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.
#PartQtyWhat it does
1 DDC Controller Board 6 parts 1× Programmable controller
2 Duct Temperature Sensor 4× MA, DA, RA, OA temps
3 Humidity Sensor 2× RA and OA humidity
4 Pressure Sensor 2× Duct static, building static
5 Coil Valve & Actuator 2× Coil control valves
6 Relay 4× Electromechanical switch in which a small coil current closes or opens contacts rated for a much larger load, isolating control circuits from what they switch.
7 Wire Bundle 2× Group of insulated conductors cut to length, terminated, and bound together to carry power and signals between the assemblies of a machine.
8 Connector 10× Mating plug-and-socket pair that joins two lengths of wiring or a cable to a board so a circuit can be assembled, serviced, and separated without soldering.

3D model

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Build & assembly graph

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Bill of materials for DDC Control System

8 top-level lines · 14 rows shown · 219 parts total · indented to 3 levels
# Item / sub-assembly Part no. Qty/assy Ext. qty Parts Type
1 DDC Controller Board 6 parts air-handling-unit-ddc-board 1× 1 193 assembly
1.1 Bare PCB pcb-bare 1× 1 · part
1.2 Microcontroller mcu 1× 1 · part
1.3 SMD Passive (R/C/L) smd-passives 180× 180 · part
1.4 Relay relay 2× 2 · part
1.5 Connector connector 8× 8 · part
1.6 Power Supply power-supply 1× 1 · part
2 Duct Temperature Sensor air-handling-unit-temp-sensor 4× 4 · part
3 Humidity Sensor air-handling-unit-humidity-sensor 2× 2 · part
4 Pressure Sensor pressure-sensor 2× 2 · part
5 Coil Valve & Actuator air-handling-unit-valve-actuator 2× 2 · part
6 Relay relay 4× 4 · part
7 Wire Bundle wire-bundle 2× 2 · part
8 Connector connector 10× 10 · part

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Where the DDC control system is used

1 product across 1 domain contain it, directly or inside a sub-assembly

Used in 1 assembly

Air Handling Unit

Sourcing: possible vendors

Browse the supplier directory → Prices, MOQ, and lead times are algorithmic estimates, not quotes, and not claims about these companies. Company mappings are curated by keyword; est. price band $0.50–$100. How estimates work
VendorHQSpecialtyMOQLead time
🇨🇳Foxconn
foxconn.com ↗ 		Shenzhen, CN Electronics contract mfg 1,000 pcs 6–10 wks
🇸🇬Flex (Singapore)
flex.com ↗ 		Singapore Electronics contract mfg 1,000 pcs 6–10 wks
🇮🇳Dixon Technologies
dixoninfo.com ↗ 		Noida, IN Electronics contract mfg 1,000 pcs 6–10 wks
🇨🇳BYD Electronics
bydelectronic.com ↗ 		Shenzhen, CN Electronics contract mfg 1,000 pcs 6–10 wks
🇸🇬Venture Corp
venture.com.sg ↗ 		Singapore Electronics contract mfg 1,000 pcs 6–10 wks