Annex L (informative) — Row budget

A planning worksheet for one row. The requirements behind it are ENC-001 (width and clear depth), PWR-001 and PWR-002 (the currents every power entry and outlet publishes, 6.1), BUS-012 (a bus board's per-header limit), SUP-001 (supply ripple), and the installation sum ASM-001. EIS does not require an enclosure to publish this table; a schema and a validator come with it.

A row is budgeted per power domain (6.1): the bus, PWR-DC12, PWR-A6, and PWR-A15, each where a source of that domain feeds modules in the row. Each domain's sources are listed with their totals (+12 V, −12 V; +5 V optional on the bus; 12 V: one +V and −V pair on PWR-DC12; +6 V, −6 V on PWR-A6; +15 V, −15 V on PWR-A15), and each module with its draw in each domain it uses.

Per-row table

Field Source
Row id / name Maker
Width (HP) ENC-001
Clear depth behind panel (mm) ENC-001
Video reference distribution none or VID-75 (a coaxial tree)

Sources, one per line, per domain

Field Source
Domain one of 6.1
Source bus board, supply, power converter, or a product with PWR-DC12 outlets
Total per rail (A), on each rail of the domain PWR-002
Outlets and the limit at each (A): bus board headers at most 2 A per rail PWR-002, BUS-012
Ripple and noise, mV p-p (a supply) SUP-001

Modules

Field Source
HP and depth PANEL-003
Draw per domain and rail (A) PWR-001

For each domain and rail, the modules' sum stays within every source of that domain, and each module's draw within one outlet's limit (ASM-001). When a module publishes no −12 V current, 9.1 recommends planning it at 50 % of its +12 V current.

EIS · A row's current budget on the bus: the example row 'performance' +12 V 0.58 A of modules, 3.42 A left bus board and supply 4 A −12 V 0.37 A of modules, 2.12 A left bus board and supply 2.5 A +5 V 0.00 A of modules, 2.00 A left bus board and supply 2 A Audio I/O: +12 V 0.12 A, −12 V 0.08 A Mixer: +12 V 0.18 A, −12 V 0.12 A VCO: +12 V 0.09 A, −12 V 0.05 A VCF/VCA: +12 V 0.08 A, −12 V 0.06 A Envelope/LFO: +12 V 0.06 A, −12 V 0.04 A MIDI utility (Type A): +12 V 0.05 A, −12 V not published A module goes into a row only while each rail's sum stays within the bus board's totals, its per-header limit, and the supply's rating (ASM-001). The dashed segment plans a module that publishes no −12 V figure at 50 % of its +12 V draw, as EIS recommends.

Machine-readable example

data/examples/row_budget_two_row.yaml describes an example two-row instrument. Check it with:

python tools/row_budget.py --check data/examples/row_budget_two_row.yaml

Schema: data/row_budget.schema.json.