AMX AXC-INP8 - Manual (Page 5)

Product Information
1 AXC-INP8 Eight Switch/Opto-Logic Voltage Input Card
Product Information
The AXC-INP8 Switch Opto Voltage Input Card provides eight inputs that can respond to switch
closures or voltage level (high/low) changes. Input signals may originate from tape transports, limit
switches, foot mats, or the AMX PCS Power Current Sensor. Each input may be set for either
switch closure (SW) or voltage operation (VO), allowing a combination of either application on the
same AXC-INP8 card.
Inputs set to the switch mode share the same Axcess system ground. When an input is set to voltage
mode, it is opto-isolated from the system, and can accept AC or either polarity DC signals.
Specifications
Power requirement Input impedance of 6.8 k Ω only requires 0.6 mA at 5 V
Power • Opto-isolated AC
• Either polarity DC voltage level input (can be from logic devices TTL, CMOS,
etc.)
LEDs:
CR1
CR2
Indicates the switch or contact for Input 1 is closed when JP1 is in the SW posi-
tion; when JP1 is in the VO position, CR1 indicates a high voltage is present
(3.5 - 28 VDC or 2.5 - 24 VAC).
Operates the same for Input 2 - 8
Jumpers JP1 - JP8
VO position
SW position
Input is set to accept voltage change (0 - 1.5 VDC or 0 - 1 VAC low, 3.5 - 28
VDC or 2.5 - 24 VAC high).
Input is set to accept a switch or contact closure change (no isolation is avail-
able in this mode).