Field reference
The tables we look up on site, in one place and readable on a phone.
- Wiegand and OSDP reader wiring referenceConductor counts, common Wiegand color conventions, OSDP RS-485 wiring, cable runs and the differences that matter when you replace a reader.
- PoE power classes: IEEE 802.3af, at and btEvery PoE class with the power the switch budgets and the power the device receives, by IEEE standard and pair count.
- Low-voltage wire resistance and voltage drop by gaugeDC resistance of 8 to 22 AWG copper and twisted-pair cable, with the voltage lost per 100 feet of run at common lock and reader currents.