Item Type: Fiber Optic ConverterMaterial: ABSModel: YN4542-A+YN4542-B (used in pairs)Interface: Compatible with EIA/TIA RS-485 standardOptical Interface: RS-485 pluggable terminal block, twisted pairOptical Fiber: pluggable SC interface, single mode single fiberPower Supply: 5.5mm inner positive and outer negative, standard power socketInterface Protection: RS-485 600W surge protection, 250V withstand voltage protectionNodes Number: RS485 maximum 32Terminal Resistance: RS485 external connection as requiredBaud Rate: 1.2k, 2.4k, 4.8k, 9.6k, 19.2k, 38.4k, 57.6k, 115.2k self-identificationData Bits: 8, N, 1Optical Fiber Parameters: A End T1310R1550B End T1550R1310Transmission Distance: Optical fiber approx. 20km / 65617ftRS485 approx. 1200m / 3937ft at 19.2kbpsPower Consumption: 1W DC5VStatus Indication: Real-time display of on-board transceiver indicatorWorking Temperature: -20~65Working Humidity: 25%~85% (non-condensing)