SEND Unit w/Internal Antenna, SafeLink Wireless Communication
The Enerpac SLS1 is a SEND unit with an internal antenna and SafeLink that provides wireless communication between the fixture-mounted SEND unit and the machine control interfaced RECEIVE unit. A pressure switch is used on the fixture to monitor the circuit pressure. If the pressure switch on the fixture goes open, the RECEIVE unit communicates the changed status to the machine control through either 24 VDC, Modbus RTU RS485 or Ethernet IP protocol, or Modbus TCP/IP. The machine control would interrupt the machining process. The SEND unit can also be used with limit switch-based position sensing clamps to verify clamped or unclamped status for robotically loaded systems.
SafeLink can provide a discrete 24VDC output signal for systems of up to four fixtures. Each SEND unit can provide up to three outputs to the RECEIVE unit. The RECEIVE unit has 6 terminal stations, which are assigned to SEND units in groups of 3. So each RECEIVE unit can be paired with 2 SEND units when using the 24VDC output. For extra capacity, and EXPANSION MODULE provides an additional terminal strip, adding two more sets of three-terminal stations. A fixture-mounted "SEND" unit uses radio communication to monitor pressure and/or clamp position.