2N Helios IP Audio Kit Installation Manual page 42

Button/Keypad Interface
Button count: Up to 16 separate buttons in 4x4 matrix
Button function: User programmable
Matrix outputs: 4 (ROW1–4 terminals) Uout < 0.1 V (L), Uout > 3.2 V (H), up to 8
mA
Matrix inputs: 4 (COL1–4 terminals) Uin < 1.15 (L), Uin > 2.15 V, max. Uin = 5 V
LED Control Outputs
Output count: 3 (LED1±, LED2± and LED3± terminals)
Output function: User programmable
Output current: Typ. 20 mA
Output voltage: Up to 12 V
Digital Outputs
Output count: 2 (OUT1± and OUT2± terminals)
Output function: User programmable
Output type: Power output with short-circuit protection
Output voltage
PoE power supply: 10 V DC
External power supply: Power supply voltage minus 2 V, maximum 11 V DC
Output current: Up to 600 mA
Digital Inputs
Input count: 2 (IN1± and IN2± terminals)
Input function: User programmable
Input type: Galvanically isolated inputs (opto-couplers)
Characteristics: Uin < 1.1 V (L), Uin > 3 V (H), max. Uin = 32 V
Relay Output
Output count: 1 (NC, NO, COM terminals)
Output function: User programmable
Limits (DC): Up to 30 V DC / 1 A
Limits (AC): Up to 125 V AC / 0.3 A
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