SLLU379 March 2024 THVD4421
| Resistor ID | Function | Package | Comment | Installed? |
|---|---|---|---|---|
| R1 | 0 Ohm resistor | 0603 | J1 to U1:L1 | Yes |
| R2 | Pull up resistor | 0603 | U1:L1 | No |
| R3 | Pull down resistor | 0603 | U1:L1 | No |
| R4 | 0 Ohm resistor | 0603 | J2 to U1:L2 | Yes |
| R5 | Pull up resistor | 0603 | U1:L2 | No |
| R6 | Pull down resistor | 0603 | U1:L2 | No |
| R7 | 0 Ohm resistor | 0603 | J3 to U1:L3 | Yes |
| R8 | Pull up resistor | 0603 | U1:L3 | No |
| R9 | Pull down resistor | 0603 | U1:L3 | No |
| R10 | 0 Ohm resistor | 0603 | J4 to U1:L4 | Yes |
| R11 | Pull up resistor | 0603 | U1:L4 | No |
| R12 | Pull down resistor | 0603 | U1:L4 | No |
| R13 | Common mode load R2 | 0603 | U1:R2 – 1 Unit Load = 12K | No |
| R14 | Common mode load R3 | 0603 | U1:R3 – 1 Unit Load = 12K | No |
| R15 | Earth to GND resistor | 0603 | N/A | No |
| R16 | Earth to GND resistor | 0603 | N/A | No |
| R17 | Common mode load R1 | 0603 | U1:R1 – 1 Unit Load = 12K | No |
| R18 | Common mode load R4 | 0603 | U1:R4 – 1 Unit Load = 12K | No |
| R19 | LED current limiting resistor | 0603 | Limits current to D1 | Yes |
| R20 | R3 to R4 RS-485 termination | 0805 | 120 Ohm termination resistor pad | No |
| R21 | LED current limiting resistor | 0603 | Limits current to D2 | Yes |
| R22 | R1 to R2 RS-485 termination | 0805 | 120 Ohm termination resistor pad | No |