Open Access v4 Specs and Ratings: Difference between revisions
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*LCD: 2x8 .100 | *LCD: 2x8 .100 | ||
<B>Relays</B> | <B>Relays</B> | ||
*4x1FormC Relays, rated to 5A at 30VDC | *4x1FormC Relays, rated to 5A at 30VDC or AC. | ||
**Pinout: NO-Common-NC | **Pinout: NO-Common-NC | ||
<B>Alarm Inputs</B> | <B>Alarm Inputs</B> | ||
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*Has a 10K pull-up resistor to +5V | *Has a 10K pull-up resistor to +5V | ||
*Pinout: 1. Input 2 Ground | *Pinout: 1. Input 2 Ground | ||
*Usable sampling range: 0-4. | *Usable sampling range: 0-4.1VDC. The protection and pull-up circuit form a 10K/2.2K divider. | ||
*Additional "Tamper" zone, which is a digital input, same configuration | *Additional "Tamper" zone, which is a digital input, same configuration | ||
<B>RFID Inputs</B> | <B>RFID Inputs</B> | ||
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<B>Further Details</B> | <B>Further Details</B> | ||
[[File:Open_Access_v4_schematic.pdf]] | *[[File:Open_Access_v4_schematic.pdf]] | ||
*[[EM4100 Reader pinouts]] | *[[EM4100 Reader pinouts]] | ||
Latest revision as of 14:43, 11 May 2014
Electrical Specs and Ratings
Power
- 11-14VDC input, 1.5A self-resetting fuse
- 5V, 2A (absolute max) PSU on-board.
- 2x200ma 12V accessory power ports (fused)
- 2x200ma 12V RFID reader supplies (fused)
- 5V power available on RPi and LCD expantion ports (unfused)
Connectors
- Power: 5.00mm Phoenix screw terminal
- Alarm, RS485, Relays: 3.50mm Phoenix screw terminal
- Jumpers: .100
- ICSP: 2x3 .100
- RPi: 2x3 .100
- LCD: 2x8 .100
Relays
- 4x1FormC Relays, rated to 5A at 30VDC or AC.
- Pinout: NO-Common-NC
Alarm Inputs
- Support analog input via Analog 0..3 pins
- Uses a 2.2K current-limited resistor, TVS diode for protection
- Has a 10K pull-up resistor to +5V
- Pinout: 1. Input 2 Ground
- Usable sampling range: 0-4.1VDC. The protection and pull-up circuit form a 10K/2.2K divider.
- Additional "Tamper" zone, which is a digital input, same configuration
RFID Inputs
- Standard Wiegand26 inputs (GND, +12V, D0, D1, LED, Buzzer)
- Same 2.2K/10K protection as Alarm inputs
- D0,D1 pins are interrupt-driven (uses PCATTACH library for additional interrupt support)
- 2.2K current-limited on LED/buzzer outputs
CPU
- Atmega328P at 16.00Mhz
- Comes pre-loaded with Arduino Bootloader
- Compatible with "Duemillenova" Arduino
- Uses FTDI FT232L USB chip and mini-USB
- Includes ICSP header (6-pin) and reset switch
RS485
- On-board hardwre RS485 chip (TI SN65HVD)
- Connected to D6 (EN), D7 (RX), D8 (TX).
- Use with SoftwareSerial library for interactive readers, chaining boards together in a bus
Real-time clock
- DS1307 RTC with CR-2032 backup battery
- 5 year+ battery life
Further Details