PCI-M512 has been replaced by PCI-M512U.
PCI-M512U provides 512K bytes memory, 12 digital input channels, and 16 output channels. PCI-M512U consists of one 12-bit input port and one 16-bit output port. DB-16P can be used to connect the input ports (CN2) for isolation purposes, or use DB-16R to interface to the output ports (CN1) for relay control. PCI-M512U PCI card supports both 5V and 3.3V. PCI-M512U (Universal PCI version) is fully compatible with the PCI-M512 (PCI version).
Users can use the DB-16P to connect the input ports (CN2) for isolation purpose, or use DB-16R to interface to the output ports (CN1) for relay control. The PCI-M512U equips two Li-batteries to maintain content in the event of PC power loss. The two Li-batteries can continue supplying power to 512KB SRAM to retain the important data for 10 years; and the two-battery design is safe to maintain the data when replacing new batteries.
The PCI-M512U also provides 4 LED indicators to display the battery states. It is easy to know the status of the two Li-batteries is normal, low voltage or fault by the 4 LED indicators. The PCI-M512U is an ideal solution for system reliability.

- On-board 512K bytes SRAM for PCI-M512/PCI-M512U
- Two Li-batteries, BT1 & BT2, for battery-backup the data of SRAM
- Two indicators, low-battery & bad-battery, for battery BT1
- Another two indicators, low-battery & bad-battery, for battery BT2
- 16-bit general purpose TTL-compatible D/O or relay (with daughter board DB-16R or DB-24PR)
- 12-bit general propose TTL-compatible D/I or isolated input (with daughter board DB-16P)
- Universal PCI card, supports both 5V and 3.3V PCI bus
- All inputs are TTL compatible
- Logic high voltage: 2.4V ( Min. )
- Logic low voltage: 0.8V ( Max. )
- All outputs are TTL compatible
- Sink current: 24mA ( Max. )
- Source current: 15mA ( Max. )