Renard64
Revision XA board (first revision)
Schematic
Layout
BOM
PCB 1 TBA Renard 64-Port PCB Resistors 3 299-27K-RC 27K Resistor, 1/4 W, Axial (RS485 pull) R5,R8,R14 2 299-1K-RC 1K Resistor, 1/4 W, Axial (RS485 series) R4,R7 1 660-MF1/4DCT52R1200F 120 Resistor, 1/4 W, Axial R6 1 299-330-RC 330 Resistor, 1/4 W, Axial (for LED) R19 2 71-CCF60-15K-E3 15K Resistor, 3/4 W, MF Resistor R1,R2 Capacitors 8 80-C322C104K5R 0.1 uF Radial-lead Ceramic Capacitor C3-C10 1 647-UVR1C470MDD 47 uF, 16V Radial-Lead Elect. Cap C2 Diodes 1 78-1N5229B 4.3v 0.5w Zener D4 (left) 1 78-1N5239B 9.1v 0.5w Zener D4 (right) 1 604-WP7104GT T1 Green LED D5 Connectors 2 571-5202514 AMP Modular Jacks, Right Angle J3, J4 16 538-95003-2881 Molex Modular Jacks, Vertical PCB mount J5-16, J18-21 2 571-6404542 AMP Polarized Header (2-Pin, Straight Post) J1,J17 8 575-199314 14 Pin Low Profile IC Socket U7-U14 ICs 1 782-H11AA1 Optoisolator U6 2 511-ST485BN RS485 Connectors U4,U5 8 579-PIC16F688-I/P PIC16F688, unprogrammed, DIP14, Industrial Temp U7-14 Oscillator 1 520-TCH1843-X Oscillator, 18.432 MHz, 5V, 8-DIP U3 Optional (if per/port LEDs are desired) 64 859-LTL403G LEDs, Rectangular, Green 8 71-CSC08A01-680 Resistor Network, 680 Ohm R10-13, R20-23 8 299-680-RC Resistor, 680 Ohm, 1/4W R15-18, R24-27 Optional (if unfiltered power is brought in through J4, see note below) 1 625-1N5819-E3 50v 1A Schottkey Diode D1 1 511-L4940V Regulator, LDO, 5V, 1.5A U1 1 140-XRL16V1000-RC 1000 uF, 16V Radial-Lead Elect. Cap C1
The on-board regulator should only be used if measures are taken to keep the current consumption down (omitting the on-board LEDs, and using the non-PWM firmware). If the LEDs are used and the PWM firmware is installed, the current consumption if the board is about 1A, and so the regulator will dissipate too much power (the small value of C1 precludes decreasing the input voltage).
Revision History
7/21/2007 BOM copied from picdimmer forum, on-board regulator made optional 7/21/2007 Value of regulator parts (diode, regulator, cap) changed. 7/21/2007 Value of LED current limit resistors changed. 7/22/2007 Changed p/n of TYCO/Amp vert. mount connector to ROHS, added note about physical size problem with them. 7/24/2007 Deleted TYCO/Amp vert. mount jacks, they don't fit. Use the Molex Jacks instead. 7/24/2007 Changed value of C2, to agree with datasheet for regulator even at low temperatures.
Errata for Rev XA PCB -
1) The trace between J4 and D1 is too small, and needs to be beefed up if the board is configured to draw more than 1/2A through J4. 2) There are two diodes labelled D4. 3) The holes for D1 are too small. 4) The silkscreen reference designator for C3 (above U10) is missing.