Borer Data Systems will shortly be launching the LIM v4 (Legacy Interface Module) door controller. The LIM v4 has been redesigned and is set to replace the LIM v3. The LIM v4 supports most manufacture's card reader heads and has an interface for Wiegand, barcode, magnetic stripe / clock & data and one wire.

Changes include: The PCB profile has been reduced to that of the LIM v2 (82mm x –62mm), without sacrificing any functionality. The power supply has been redesigned reducing the power required, resulting in the LIM v4 drawing less power than the already frugal 50mA power consumption of the LIM v3. The two existing relays have been replaced with two efficient Omron relays. The Omron relays can switch greater currents, 5 Amp @ 35V DC, instead of the existing 3 Amp 35v DC of the LIM v3. The relays also draw less current when operated. The relay units have 100 volt lock spike suppression circuit protection, compared to the 50 volt available on the LIM v3. Cable termination is made easy thanks to the inclusion of the low profile plug in male and female connectors. The memory has been increased from 2Mb (LIM v3) to 4Mb (16000 cardholder / transaction events), with the option of 16Mb memory capacity (64000 cardholder / transaction events) Borer’s proprietary dual database technology included - in the event of a ncomplete download, corrupt data or a network failure during download to the controller, the LIM v4 will revert to using the “last known good database”. This safeguards the LIM v4 from working with a corrupt database or reverting to a default “let all cardholders in” mode. A 3x4 or 4x4 numeric PIN pad connection has been included – enabling specialist keypads, such as the Storm series, to be connected directly to the LIM v4, without the need to use a Wiegand or RS232 interface connection. This both simplifies and reduces the cost of connecting a PIN pad. Includes a LCD interface – LCD display can be added for bespoke applications.