Item Type: Fiber Optic Converter_x000D_ Material: ABS_x000D_ Model: YN4542-A+YN4542-B (used in pairs)_x000D_ Interface: Compatible with EIA/TIA RS-485 standard_x000D_ Optical Interface: RS-485 pluggable terminal block, twisted pair_x000D_ Optical Fiber: pluggable SC interface, single mode single fiber_x000D_ Power Supply: 5.5mm inner positive and outer negative, standard power socket_x000D_ Interface Protection: RS-485 600W surge protection, 250V withstand voltage protection_x000D_ Nodes Number: RS485 maximum 32_x000D_ Terminal Resistance: RS485 external connection as required_x000D_ Baud Rate: 1.2k, 2.4k, 4.8k, 9.6k, 19.2k, 38.4k, 57.6k, 115.2k self-identification_x000D_ Data Bits: 8, N, 1_x000D_ Optical Fiber Parameters: _x000D_ A End T1310R1550_x000D_ B End T1550R1310_x000D_ Transmission Distance: Optical fiber approx. 20km / 65617ft_x000D_ RS485 approx. 1200m / 3937ft at 19.2kbps_x000D_ Power Consumption: 1W DC5V_x000D_ Status Indication: Real-time display of on-board transceiver indicator_x000D_ Working Temperature: -20~65_x000D_ Working Humidity: 25%~85% (non-condensing)