ODAS-RELAY-16
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Contents
Features
- 16-channels of relays
- SPST
- Normally Open Relays
- 1 FORM A
- Individual Relay Channel Drivers
- I2C bus
- Up to 400 KHz
- MCP23017 I2C Expander
- Extensive Library Support
- Three I2C address jumpers allow up to 8 cards
- D-Sub DC-37 Male connector
- Two pins for contact pair
- 3.3V or 5V I2C operation
- Power via I2C connector or dedicated power connector
- Relay Power Connector
- 12V - 5mm terminal block
- 24LC024 ODAS Personality EEPROM
- pid = 9
- ODAS Form Factor
- 95x95mm
Headers
H1 - I2C Termination
Install to terminate I2C on this card Open to terminate I2C elsewhere in the I2C chain
H2 - EEWE - EEPROM Write Enable
Install to allow writes to EEPROM Remove to prevent writes to EEPROM
H3 - I2C Base Address Select Jumpers
Three jumper positions Address A0-A2
Connectors
J1 - Logic Power
3.3V or 5V logic power
- GND
- VCC (Logic)
- GND
- VCC (Logic)
- GND
J2 - Relay Power
- +V(Relay) - 12V
- GND
- J3 - I2C Daisy-Chain Connector
- SCL
- SDA
- VCC
- GND
J4 - Card Detect/Interrupt
- GND
- INTA
- INTB
- CARD PRESENT - active low
P1 - DC-37 Relay Contact Pairs
Pin Conn Pin Conn 19 R1-C 37 R1-NO 18 R2-C 36 R2-NO 17 R3-C 35 R3-NO 16 R4-C 34 R4-NO 15 R5-C 33 R5-NO 14 R6-C 32 R6-NO 13 R7-C 31 R7-NO 12 R8-C 30 R8-NO 11 R9-C 29 R9-NO 10 R10-C 28 R10-NO 9 R11-C 27 R11-NO 8 R12-C 26 R12-NO 7 R13-C 25 R13-NO 6 R14-C 24 R14-NO 5 R15-C 23 R15-NO 4 R16-C 22 R15-NO 3 N/C 21 N/C 2 N/C 20 GND 1 GND C = Relay common connection NO = Normally Open relay contact N/C = No Connection
Drivers
Driver is any MCP23017 driver.
Arduino Driver
Uses Adafruit driver Adafruit_MCP23017 Example code at ODAS-RELAY-16 Example Code. Raspberry Pi Driver Uses Adafruit Raspberry Pi driver Driver Alternate library Wiring Pi
Raspberry Pi Pico
MMBASIC
- SWLEDX8-01.bas - Read 8x switches, write 8x LEDs
- MMBASIC Example Code - Bounce a bit across the 16-bits (not for use with SWLEDX8 card)
Layout
ODAS-RELAY-16-X2-Dimensioned.PNG
Parts List / Assembly Sheet
Changes in Rev X2 PWB
Narrower footprint for K1-K16 relay parts Changed relays to to 4x4 array Issues with Rev X1 PWB Pad spacing on relays is too wide Part is narrower than a normal 8 pin DIP
Rev X1 Layout
ODAS-RELAY-16-X1-Dimensioned.PNG
