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DSD Wireless Push Buttons WPB-1942

6 Push Button Wireless System ($569)

Wireless Receiver Schematics

The wireless push button system or Wireless Pendant, consists of a hand-held wireless transmitter with push buttons, and a wired receiver. The receiver is wired to Digital Inputs of a controller such as a PLC. When one or more buttons are pushed on the transmitter, the receiver sends the corresponding inputs to the PLC using the digital inputs. The buttons on the transmitter are normally paired to be used with mutually exclusive functions such as Jog Forward and Jog Reverse, Jog Up and Jog Down etc. For this reason, an electronic interlock is built into the unit so that if both buttons in any pair are pushed, neither of those buttons are registered as inputs on the PLC.

A unique identifier is used in every pendant system so that any transmitter will work only and only with its intended receiver. Optionally, multiple transmitters with different functions can be used with a single receiver as a method of I/O expansion.

WIRELESS PUSH BUTTON BENEFITS

A wireless pendant is indispensable when the operator needs to control machinery from different physical locations, such as when aligning a coil of material during loading it to an Uncoiler, or closely inspecting the formation of products during manual line run in a Rollformer. A wireless system can also help in testing machine operation from a safe distance when necessary.

WHERE CAN IT BE USED?

It can be used in any situation where the operator needs to control machinery while having the flexibility of moving around on the floor.

General Specifications

Frequency : 433 MHz
Range : up to 300 ft (100 meter)
Transmitter battery life : 120 Hours continues use (Two AA batteries)
Transmitter dimensions (mm) : H140 x W81 x D33
Receiver dimensions (mm) : H150 x W86 x D25
Output types : Digital Output (Sourcing)
Receiver voltage : 24VDC (18-28 VDC)

There are two LEDs located on the transmitter, Transmit and Receive. Transmit LED will flash when a push button is pressed and transmitter sends a radio signal to the receiver. Receive LED will flash when the receiver receives the signal and sends an Acknowledge radio signal back to the transmitter. This feature can be used to test the range of the transmitter.

The wireless receiver includes a safety time-out function which prevents any outputs from latching on inadvertently (during loss of transmission, for example). If the receiver does not receive any transmission for more than 200 milliseconds, the receiver turns off all outputs.

The receiver includes a 1 Amp fuse for over current protection.

Each transmitter comes with a custom label (overlay) showing the functions of the buttons. When ordering a transmitter, the details of the label must be specified.