RS485 bus gateway. Bidirectional. Standby loss only 0.3 watts. Modular device for mounting on DIN-EN 60715 TH35 rail. 1 division unit = 18mm wide, 58mm deep. Connection to the Eltako RS485 bus. Cross-wiring of 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. Data is transmitted via the 4-wire bus and power is supplied with a 12V DC switching power supply. The connection is made using a standard telephone cable (JY (ST) Y 2x2x0.8mm2, for example). The permissible total cable length is 1000m. The second 120 Ohm terminating resistor included with the BGW14 must also be connected to the RSA/RSB terminals on the most distant sensor. With up to 8 BGW14s, data from up to 128 sensors can be fed into the RS485 bus. The setting of the operating mode rotary switch BA is carried out in accordance with the operating instructions.
