I/O Schedule Builder — Signal Type & Point Count

Tick the field instruments in your station, choose 4-20 mA or RS-485/Modbus for each, and get the live point count — AI / AO / DI / DO / Modbus nodes — the PLC module sizing with a 20 % spare, and the field-wiring pair estimate. This is the one-page deliverable you hand the panel builder. It closes out the Instrumentation & Control manual.

1Instrument list & signal type

Set the count and pick the signal for each device. Analysers can be analog (4-20 mA) or on the Modbus bus; actuators are hardwired. Models are the in-stock catalogue — nothing invented. Change any value and the schedule updates live.

Spare on I/O^[1] (10–30)%

Hazardous area (biogas)?^[2]

Results — I/O point tally

AI (analog in)

—

AO (analog out)

—

DI (discrete in)

—

DO (discrete out)

—

Modbus nodes

—

Point type	Raw	+spare	Module / rule	Cards	Capacity

Controller & wiring recommendation

Item	Value	Note

2The design chain — where each point comes from

Every AI point is a 4-20 mA loop. Its power, cable and IS-barrier budget were sized in Unit 1.

Every Modbus node is an RS-485 drop. Its length, unit load and surge protection (LW-10) live in Unit 2.

Every loop range sits in the %FS golden band. The use-based verdict (control vs compliance) was set in Unit 3.

The station's power is the UPS. VA and battery Ah for the hold-up time were sized in Unit 4.

This schedule is the deliverable. The point count + module list above is what the panel builder quotes and wires.

The full manual — Units 1 through 5 — is now complete. Each unit is an interactive tool plus a full calculation sheet.

Quote this panel at factory price

Every instrument above is quotable at the manufacturer's ex-works price — our margin comes solely from the export tax rebate (or a fixed service fee if you only need receiving, customs and rebate handled). The analysers, flowmeters, controllers and surge protectors are in stock; panels and I/O modules are sourced to your schedule.

Request a quote for this I/O list ← I&C Unit 4: UPS sizing

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Sources & parameter basis

[1]	I/O design practice — 10-20 % spare on PLC I/O cards; analog 8-ch, AO 4-ch, DI/DO 16-ch module sizing; 32-unit-load limit per RS-485 segment (Unit 2).
[2]	Hazardous-area (biogas/H₂S) wiring — intrinsically-safe (IS) barriers add a barrier drop per loop and 3-wire field runs; loop power budget in Unit 1.
[3]	Signal mapping — PH6000C pH+ORP = 2 AI (or 1 Modbus node); DO6000Y / MS6000SG / NT6000G / CON6000C = 1 AI (or 1 node); SE10A = 1 AI + 1 pulse DI (or 1 node); S3000L / S3000CG·CD = 1 AI.
[4]	Actuator mapping — pump 1 DO + 1 DI (fault); on/off valve 1 DO (modulating → 1 AO); dosing pump LM80C/TS600 1 DO + 1 AI (speed FB); CTL-IO-AIO 2 AI + 1 AO; UV skid 1 DI.
[5]	Jiuyuhub product data — PH6000C, DO6000Y, MS6000SG, NT6000G, CON6000C, SE10A, S3000L, S3000CG·CD, CTL-IO-AIO, LM80C/TS600, LW-10 (RS-485 surge) in stock.

Full derivation and worked example: IO-Schedule-Calculation-Sheet.md (Unit 5 of the I&C manual).

Questions about a duty, a specification, or transparent sourcing? Contact our application engineers →