NXC-I/O10 Input/Output Control Card

Setting the Switch/Voltage Mode Jumpers

The NXC-I/O10 responds to switch closures or voltage-level (high/low) changes. Compatible I/O devices include the Power Control Sensor (PCS), tape transports and limit switches. The inputs are set for SW mode (closure) or VO mode as described below.

SW (switch) Mode setting (default)

(Jumper pins 2 and 3)

VO (voltage) Mode setting

(Jumper pins 1 and 2)

Senses switch or relay contact closures or provides a logic-level output. The 3-pin jumpers for each input should be set to SW before wiring inputs to the Card. An "On" condition is triggered by contact closures or a logic low of 0 to 1.5 VDC. An "Off" condition is triggered by a logic high of 2.5 to 5 VDC; set the associated I/O to switch mode. When used for an output, each I/O port acts as a switch to ground (GND), and is rated at 200 mA @ 12 VDC.

Senses high- and low-voltage states commonly from AC or DC signals. This mode provides opto-isolation. The 3-pin jumpers for each input should be set to VO (voltage mode) before wiring inputs to the Card. An "On" condition is triggered by DC levels from 2.5 to 28 VDC (+ or -), or AC levels from 2.5 to 24 VAC. An "Off" condition is triggered by DC levels from 0 to 1.5 VDC (+ or -) or AC levels from 0 to 1.5 VAC.

In switch mode, the A terminals are connected to the NetLinx Controller's ground. Sources that require isolation from the Controller's ground should use voltage mode, and provide switched DC power for sensing as required.

Setting the Voltage Clamp Jumper (+12V or Open)

Set the V- Clamp jumper (J31) to +12 V (default) to clamp any voltage connected to I/O ports 1-10 to 12 V. Set to Open for connections that will draw more than 12 V. Remember, the +12 V and OPEN settings are only enabled when the I/O ports are set to SW mode. The V-Clamp jumper settings are described below.

+12 V mode setting (default) Use the default setting for all loads that require less than 12 V.

Open mode setting

When this jumper is set to Open, and an I/O port is used as an

 

output, the I/O port is rated at 85 mA @ 28 VDC.

When this jumper is Open, it is the technician's responsibility to clamp the external source relay anytime the voltage exceeds 12 V. The source relay should always be clamped if the voltage exceeds 12 V. Contact the relay manufacturer to determine the size of the diode in the source relay.

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AMX NXM Series Setting the Switch/Voltage Mode Jumpers, Setting the Voltage Clamp Jumper +12V or Open, Open mode setting

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