Electrical and Cable Specifications
The current JS-20 scanners have two connectors: an LTW Industrial Sealed Ethernet, and a Switchcraft EN-3 8 conductor circular sealed connector. The 8 conductor EN-3 connector is used to supply power as well as encoder and synchronization signals to the JS-20 scanner.
The encoder inputs are RS-422 5-V differential signals. They support encoder rates up to a maximum of 100,000 pulses per second.
The Start Scan input signal can be driven by either RS-422 5V differntial, 5V push pull, or open collector outputs. The Start Scan signal is edge triggered, and by default triggers on a falling edge. The
StartScanTriggerOnHigh parameter reverses this, and causes the scanners to trigger on a rising edge.
JS-20 scanners are generally connected with our standard 8 wire cable. Alpha 2643C or an equivalent cable is suggested.
Table 2. Alpha 2643C / EN-3 / 8-Wire Diagram
|Wire Color||EN-3 Pin||Function|