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2.2.1. SCH motherboard diagram Motherboard diagram 4DI4DO4ALed Uhlan MB V1.1 plant automation  Motherboard diagram 4DI4DO4ALed Uhlan MB V1.1 Power supply of the plant automation Bill of Materials Qty
| Value | Device | Parts | Description | | 4 | | LED3MM | LED1, LED2, LED3, LED4 | 3mm red LED
| | 1 | | LED5MM | LED5 | 5mm green LED | | 9 | 1K | R-EU_0207/10 | R5, R8, R9, R10, R12, R13, R14, R16, R18 | Standard Resistance ¼ watt 5%
| | 1 | 1K2 | R-EU_0207/10 | R20 | ¼ watt resistor 1% * Depends on IC2, see documentation
| | 1 | 1N4004 | 1N4004 | D1 | 1A standard diode
| | 4 | 1uF | EUE2.5-5 CPOL- | C1, C4, C7, C9 | 1uF/25V electrolytic capacitor
| | 1 | 3K6 | R-EU_0207/10 | R19 | ¼ watt resistor 1% * Depends on IC2, see documentation | | 4 | 4N25M | 4N25M | OK1, OK2, OK3, OK4 | 4N25M Optocoupler or equivalent
| | 2 | 5A | FUSE2P | F1, F2 | PCB Fuse 5A fuse 5x20mm | | 4 | 5V1 | ZENER-DIODEDO35Z10 | D2, D3, D4, D5 | 0.4 W Zener diode 5.1V BZX79-B5V1 or similar | | 8 | 10K | R-EU_0207/10 | R1, R2, R3, R4, R6, R7, R11, R15 | Standard Resistance ¼ watt 5% * R1, R2, R3 and R6 depend on the supply voltage of the relay, see diagram
| | 1 | 100nF | C-EU050-025X075 | C8 | Miniature Condenser 100nF/100V MKT | | 1 | 100uF/63V | CPOL-EUE3.5-8 | C10 | 100uF/63V electrolytic capacitor
| | 1 | 100uH | L-USTJ2-U2 | L1 | Coil Inductor 100uH, 1A
| | 1 | 1000uF/16V | EUE5-10.5 CPOL- | C11 | 1000uF/16V electrolytic capacitor, preferably 105 ° C low esr
| | 1 | CPU | CPU-2 | MO1 | 2 female 9-way PCB connector x 1 rows step 2.54 mm for poles
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| Qty | Value | Device | Parts | Description | | 1 | D04PA-PAD | D04PA-PAD | $ 1 | Encapsulated PCB Heatsink TO220 * Only required if 5V relays are | | 8 | DI, Lan +24 V, Led_A, Led_B, Led_C, Led_D, 24V_In, 24V_Out | W237-102 | X6, X3, X10, X8, X9, X12, X13, X14 | Strip connection for 2-way PCB (PCB terminal blocks) | | 6 | DO1, DO2, DO3, DO4, Rs-485, DI | W237-103 | X2, X4, X5, X7, X1, X11 | Terminal strip 3-way PCB (PCB terminal blocks) | | 1 | F0, 22 | R-EU_0207/10 | R21 | Fuse resistance Ω ¼ watt 0.22 * View Documentation | | 4 | G5LE | G5LE | K1, K2, K3, K4 | PCB power relay 10A SPDT G5LE Omron type 5/12/24 / .. Vdc coil, or similar * For any supply voltage (relay = 5V), for the rest, the voltage of the relay must be equal to the power of home automation network | | 1 | Or LM2575T-5.0 LM2575TV-ADJ
| LM2575TV | IC2 | LM IC switching regulator 5V 1A or equivalent * Preferably LM2575TV-5.0 (R19 and R20 are canceled), see documentation
| | 4 | POWER_LED | POWER_LED_2 | MO2, MO3, MO4, MO5 | Drivers Current Regulator for LEDs, PowerLed | | 1 | UF4003 | UF4003 | D6 | Power diode ultrafast UF4003 or similar 1A | | 1 | ULN2803 | ULN2803A | IC1 | 500mA transistor array ULN2803A or equivalent 50V |
Terminal Blocks This version of the motherboard has been optimized to use various PCB terminal strips or terminal blocks 2.54 passing of various types. You can choose standard terminal blocks or pluggable terminal blocks as shown in the following figures. Blocks have to choose the type stackable connectors to join Rs-485/Lan DI and +24 to form a single body of contacts.  Standard terminal block  Angled terminal block plug Loading
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