Fixing Dangling Trace Issue
Run the full DRC now and fix any remaining issues.
Thought for 4 sec
I’ll run the full DRC, fix any remaining layout issues that show up, and re-check until the board is clean or I hit a blocking issue.
Worked for 1 min 7 sec
Full DRC is clean. I checked airwires, dangling traces, floating/overlapping copper, missing footprints, invalid layers, overlapping fills/traces, under-connected vias, protected intrusions, and related layout checks; no warnings or errors were reported on the verification pass.
Open items:
- None found in DRC.
- No fixes were needed.
Suggested next steps:
- Visually inspect the board one more time around J2/J7/J6.
- Regenerate manufacturing exports if you want updated files after the reroute.
- Order a small prototype batch before committing to larger quantities.
Inspect and export
Regenerate exports
Check connector labels
Review BOM sourcing
Create test plan
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Project Specification
Overview
Design a simple 12 V wiring/interface PCB that connects a SECO-LARM ENFORCER E-931-S35RRQ retro-reflective photoelectric sensor to a 12 V DC battery supply, a SECO-LARM E-941SA-80Q electromagnetic lock, a manual RF remote release path, and a selectable photoeye bypass path.
Known device wiring
- E-931-S35RRQ power: Brown/Blue, 12–240 VDC or 24–240 VAC, polarity not important per manufacturer manual.
- E-931-S35RRQ relay contacts: White = COM, Gray = NC, Black = NO.
- E-941SA-80Q lock: 12–24 VDC electromagnetic lock, approximately 60 mA at 12 VDC per current manufacturer product data.
- Fuse selection: 1 A fuse installed in F1.
- RF manual release target: SECO-LARM SK-910RD2 or equivalent 12 V-compatible RF relay receiver with at least 500 ft / 150 m rated range.
- Photoeye bypass: external maintained SPST switch across the photoeye NC contact.
Implemented schematic
Table
| Designator | Function | Field wiring |
|---|---|---|
| J1 | Battery input | L1 = Battery +12 V, L2 = Battery 0 V/GND |
| F1 | 1 A input fuse holder | Series fuse between battery + and fused board rail |
| J2 | SECO-LARM E-931-S35RRQ terminal | 1 = Brown power, 2 = Blue power, 3 = White relay COM, 4 = Gray relay NC, 5 = Black relay NO unused |
| J7 | Photoeye bypass switch terminal | L1 = fused +12 V/photoeye COM side, L2 = RF COM/photoeye NC side; external SPST switch open = photoeye active, closed = photoeye bypassed |
| J6 | RF receiver relay contact terminal | 1 = relay COM from photoeye NC/bypass node, 2 = relay NC to lock +, 3 = relay NO unused |
| J5 | RF receiver power terminal | L1 = fused +12 V to RF receiver, L2 = GND to RF receiver |
| J3 | SECO-LARM E-941SA-80Q lock output | L1 = lock +12 V, L2 = lock 0 V/GND |
| D1 | Maglock flyback diode | Cathode to switched +12 V, anode to GND |
Electrical behavior
- Battery +12 V enters J1 and passes through F1 to FUSED_12V.
- FUSED_12V powers the photoeye brown wire, feeds the photoeye relay COM white wire, powers the external RF receiver through J5, and feeds J7 L1.
- With J7 bypass switch open, the photoeye NC gray wire must be closed for power to reach J6 pin 1.
- With J7 bypass switch closed, FUSED_12V is connected directly to J6 pin 1, so the photoeye contact is bypassed and no longer affects the lock state.
- The RF receiver NC contact remains in series after the photoeye/bypass node: J6 pin 1 COM to J6 pin 2 NC to J3 L1.
- Pressing the RF remote should energize the receiver relay and open its NC contact, interrupting lock power for manual release even when the photoeye is bypassed.
- The lock negative returns to J3 L2/GND.
- The photoeye black NO wire and RF receiver relay NO contact are intentionally unused.
Modes
Table
| J7 bypass switch | Photoeye beam break | RF remote press | Maglock result |
|---|---|---|---|
| Open | No | No | Energized/locked |
| Open | Yes | No | Released |
| Open | No | Yes | Released |
| Closed | Any | No | Energized/locked |
| Closed | Any | Yes | Released |
Constraints and limits
- The E-941SA-80Q load is approximately 60 mA at 12 VDC, far below the E-931-S35RRQ relay rating of 2 A at 30 VDC.
- F1 is specified as 1 A, which is below the 2 A relay-contact ceiling and provides margin for wiring/installation variation.
- Keep D1 installed across the lock output for inductive kick suppression.
- Configure the RF receiver for momentary/timed relay activation suitable for door release, not a permanent latched unlock unless intentionally desired.
- RF range depends on antenna placement, enclosure material, and line of sight; use the manufacturer antenna/extended antenna if the installation must reliably meet 150 m.
Open assumptions
- Nominal system voltage is 12 VDC.
- Current design uses the latest product data current value of approximately 60 mA at 12 VDC; verify against the exact lock label/manual during installation.
- RF receiver model is assumed to be SECO-LARM SK-910RD2 or equivalent with dry Form-C relay output and 10–24 VAC/VDC power input.
Overview
Known device wiring
Implemented schematic
Electrical behavior
Modes
Constraints and limits
Open assumptions
