Rockwell Land · Innovation

RS485 AMR Design & BOQ Calculator

Encode the building once — get channel plan, cable computation, repeater assessment, and costed BOQ.

1 · Building & Floors

Building name

Quick fill: floors

Meters / floor

skip labels 4 & 13 prepend LG + G

#	Floor label	Meters	Gateway

List every physical level bottom → top, even levels with 0 meters (the riser still passes through them). Tick where the gateway sits (usually the lowest floor / LG).

2 · Design Variables

Floor-to-floor (m)

Horizontal per floor (m)

Max meters / channel

Cable slack (%)

This cap is the design authority per RS485 segment — set 32 if the meters are full unit-load (⅛-load transceivers allow far more). Floors above the cap get a split-or-repeater choice in the channel plan.

Spool size (m)

RS485 segment limit (m)

Repeater savings threshold (%)

Repeaters are recommended only when they cut the total by at least this much.

Meter-to-meter (m)

Pairs per cable

Daisy-chain jumpers between meters. RS485 uses one pair, so a 4-pair cable is cut into 4 jumpers per cable meter — the hop length is divided by the pair count. Leave 0 to treat jumpers as covered by slack.

3 · Unit Prices (₱)

Gateway variants (ETH to RS485)

COM ports	Price ₱

The calculator always buys the cheapest mix that covers every channel — add a variant here (e.g. 16-port) when a supplier offers one.

Raspberry Pi head-end

Power supply

Repeater set (w/ PSU)

Cable spool

Ethernet switch

Quoted only when the design needs more than one gateway.

Terminals ₱ / meter dev.

Conduit ₱ / cable m

Override terminals ₱ (blank = auto)

Override conduit ₱ (blank = auto)

Saved Buildings

Profiles are stored in this browser (localStorage).

Recommended Design

Design option

The BOQ, totals, and Excel export follow this choice.

Encode floors to see results.

Channel Plan

Cable Computation

Bill of Quantities

Materials only — installation by in-house team. Prices are VAT-exclusive canvass prices.