RS485 bus gateway. Bidirectional. Standby loss of only 0.3 watts. Series installation device for mounting on DIN-EN 60715 TH35 mounting rail. 1 division unit = 18mm wide, 58mm deep. Connection to the Eltako RS485 bus. Cross-wiring bus and power supply with jumper. Operation in conjunction with FAM14 or FTS14KS. The hold terminal is connected to the FAM14 or FTS14KS. Up to 16 RS485 sensors BUTH65D/12VDC, BBH65/12VDC and BTR65H/12VDC can be connected to the RSA/RSB terminals. The 4-wire bus is used for data transfer and power supply with a 12V DC switching power supply. The connection is made e.g. with the usual telephone cable (J-Y (ST) Y 2x2x0.8mm2). The total permissible cable length is 1000m. The second 120Ohm terminating resistor supplied with the BGW14 must also be connected to the RSA/RSB terminals on the furthest sensor. With up to 8 BGW14, data from up to 128 sensors can be fed into the RS485 bus. The operating mode rotary switch BA is set according to the operating instructions