ELMB2 is an analog/digital I/O module with CANbus interface. They are used in various CERN installations in control and monitoring of equipment. The ELMB2 is radiation qualified.
The ELMB2 is a pin-compatible version to the original ELMB. The ELMB2 is a fully backward compatible solution which preserves the existing infrastructure and has improved radiation tolerance as a result of the substitution of the most vulnerable components by more tolerant types.
AVR RISC architecture ATMEL Atmega128
128 Kbytes of on-chip flash memory,
4 Kbytes of SRAM,
4 Kbytes of EEPROM,
In-System Programming via CAN bus
Full CAN controller interface with PCA82C250
6 bit CAN identifier and 4 baud rates supported
3-wire SPI interface
Real Time Counter with a separate 32 kHz crystal
8-channel 10-bit ADC I/O lines available
Separate regulator for the CAN bus transceiver and optocouplers
Regulator for the microcontrollers
Voltage converter 3.3V to 5.4V
Optional Delta-sigma ADC CRYSTAL CS5523 with 64 channel multiplexer
6 bipolar or unipolar input ranges from 25mV to 5V
100 pA input current on 25mV, 55mV and 100mV
10nA on 1V, 2.5V and 5V ranges
8 conversion rates from 2 Hz to 100Hz
64 channel multiplexer
+5V and -5V on board power regulators
The size of the printed circuit board is 50x67mm.
The board is equipped with two connectors with 100 pins.