We are sorry but this product (NV ICMI TC250-4-P-C1 TAPCON 2504-20mA DC ANALOG SIGNAL TAPPOSITION INPUT, PARALLEL (MIN.CIRC. REACTIVE CURRENT,MASTER/FOLLOWER) FEATURES INCLUDED,COMMUNICATIONS (DNP3.0, MODBUS,ETC) VIA RS232, RS485 CONN's ANDFIBER OPTIC "ST" CONNECTORS,03/04 FIRMWARE) is a restricted item.