Surgex SX-20NE-RT-AR User Manual download pdf (Page 8)

SX-20NE-RT-AR User Manual

Page 7

IV. Remote Control Connections

(continued)

b) Contact Closure/Latching Switch: The unit will power up when the contacts are closed,

and power down when the contacts are open. Connect the two wires from the contacts

or switch to Pin 1 (Contact Closure) and Pin 2 (Contact Closure).

Output control requires a combination of Axess Ready (AR) control via IP and Remote Turn-

On/Off (RT) control via hard-wired connection. The following table will detail the LED and output

states during various operating conditions.

Control State

Output State

Axess

Control

Input

Axess

LED

Remote

LED

Out

put

Off

Any

Off

External LED Connections

The SX-20NE-RT-AR product is able to drive external LEDs or other signaling devices through

its 12V DC LED outputs, which can provide up to 10mA of current each. External LEDs

connected to the Power LED pins (5 and 6) will be illuminated when AC power is applied to the

unit, and external LEDs connected to the Remote LED pins (7 and 8) will be On when the unit’s

AC output is On, and Off when the output is Off. When connecting LEDs to either output, a

series resistor is required. For example, many LEDs work well with 10mA of current, so a 1KΩ

resistor is usually a good choice. If more than one LED is required, then use a separate series

resistor for each LED. For example, two external LEDs, each with a 2kΩ series resistor, could

be powered from one unit at 5mA each.

Connect each LED anode to “LED +” through a resistor, and the cathodes to “LED -”.

Auxiliary Relay Contacts

The auxiliary relay contacts, Pins 9 & 10, provide a way to cascade units or to provide

confirmation feedback to a central controller. When the output is On, the aux relay contacts are

closed. There is a ½ second delay before the aux relay closes, which allows time for the SurgeX

Inrush Current Elimination (ICE™) circuit to operate. This short delay in combination with the

SurgeX ICE™ makes it unnecessary to sequence the power to several large loads (such as

amplifiers) because of inrush current. SurgeX SX-20NE-RT-AR products, when cascaded, can

turn on a bank of large amplifiers with no inrush current, and therefore no risk of tripping a circuit

breaker.

To cascade two or more SX-20NE-RT-AR products, connect the aux relay contacts of one unit

to the contact closure input of the next unit. To provide confirmation feedback, connect the aux

relay contacts to an input on the central controller. The relay contacts are rated for 1 amp at 30

V DC.

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Surgex SX-20NE-RT-AR User Manual Page 8

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