Logic GND1 is COMPUTE_0V; field FGND is SAFETY_0V. SUB pins require separate floating copper and no connection. Device isolation is not system safety approval.
BOUNDARY1
GALVANIC DOMAIN BOUNDARY - ZERO SAFETY CREDIT
The ISO1212 barriers separate these schematic domains. Cable, PCB, enclosure, PE, parasitic capacitance and fault paths determine the real system boundary.
CDEC1,CDEC2
100 nF 50 V X7R; Murata GRM21BR71H104KA01L
Place at UOBS1 within TI guidance; received capacitance and layout remain open.,Place at UOBS2 within TI guidance; received capacitance and layout remain open.
CFI1-CFI4
10 nF 50 V X7R; TDK CGA3E2X7R1H103K080AA
TYPE-3 INPUT FILTER; 10 nF nominal is not credited until bias/tolerance/temperature and installed EMC evidence exist.
H1EXT?
Existing IDEC HW1P-1FQD-A-24V load outside this board
Catalog screen is 7 mA DC, but exact received current and Y32 low-voltage brightness are not accepted.
JFIELD1
Phoenix MKDS field terminal candidates: 1751264 plus 1751248
Four positive status nets plus one field return and one deliberate no-connect. Position numbering is project-defined and not a harness release.
JLOGIC1
Phoenix MKDS compute terminal candidates: 1751264 plus 1751248
No Raspberry Pi GPIO or header pin is selected. Exact mating cable/contact system and external 3V3-load acceptance remain open.
K1AUX?,K2AUX?
Existing Schneider LC1D25BD NO auxiliary 13-14
Minimum signalling application: 5 mA and 17 V. This NO contact is diagnostic only.,Same application boundary as K1AUX.
RPD1-RPD4
10.0 kohm 1% 0.125 W 0805; Panasonic ERJ6ENF1002V
FAIL-LOW PULLDOWN; exact component identity inherited from the controlled watchdog receiver network. No fabrication or connection release.
RSN1-RSN4
562 ohm 1% 0.125 W 0805; Panasonic ERJ6ENF5620V
CURRENT LIMIT; exact component identity inherited from the controlled watchdog receiver network. No fabrication or connection release.