The SPLC12/24 monitors and/or writes to 12/24 Modbus registers in a PLC or other Modbus device in addition to primary and battery power.

The SPLC is an ideal device for alarm notification from PLC, a simple local user-interface for the PLC register values and a remote access device allowing modification of coils and holding registers in the PLC.

• Communicates via Modbus RTU protocol
• Reads and writes coils and holding registers.
• Provides alarm notification on:
  • change of digital (coil) state
  • analog value (holding) reaching a low and/or high setpoint
  • loss of primary power to the SPLC - automatically switches to internal backup battery
  • backup battery voltage is low
  • loss of communication with any of the PLC or Modbus device registers
• Provides simple to use interface to view all monitored registers in the PLC or Modbus device.
• RS-232 interface for communication to a single Modbus Slave device
• Add RS-232 to RS-485 converter to communicate to multiple Modbus Slaves devices.
• Coils and Holding registers can be modified by remote call in, allowing a user to modify their control capabilites in the PLC or Modbus device.
• Calls up to 8 phones/pagers when an alarm occurs.
• Can be programmed locally or remotely via a phone call into the unit.
• Includes UL power supply, backup battery, phone cord and manual.
• SPLC is panel or flush mountable, making it easy to integrate into a control panel.
• NEMA4X optional for outdoor or corrosive environments.