Details Two 4-wire circuit connections to Eclipse HX Impedance matching Transformer isolation Level adjustments between systems Supports external relay activation and call-sense circuitry Eclipse HX Configuration Software (EHX) Item Code FOR-22 Technical Specifications Audio Frequency Response: 20Hz -15 kHz, +0/-3dB Audio Input Level: 0dBv nominal Input Impedance: >10KΩ, transformer balanced Audio Output Level Nominal: 0 dBv, -15 dBv, or -55 dBv, jumper selectable Maximum: +20 dBv Output Impedance: 150Ω nominal, transformer balanced Call Signal Input: 4 - 50V DC Relay: SPDT, 24V DC @ 1 Amp Power Power Requirements: 150mA max from PSU-101 power supply Environmental Operating Temperature: 32° - 104°F (0°C - 40°C) Storage Temperature: -67° - 158°F (-55°C - 70°C) Humidity: 90% non-condensing Dimensions 5.06 x 1.38 x 9.16in (HxWxD) (129 x 35 x 233mm) Weight 12.5oz (0.32kg)