The IB1004 + SB1004 include the following blocks:
A/D converter (8 channels, 24 bits, based on the 24-bit AD7712 converter).
D/A converter (4 channels, 14 bits, with separate voltage and current outputs, based on the 14-bit AD7836 converter).
Two low-current mechanical relays (both normally-opened and normally-closed terminals are provided).
RS232/485 port (RX/TX signals for the RS232, TX/RX+ and TX/RX- for the RS485).
Control lines for 8 LEDs on the LB1001 board.