Monitoring Devices

The KD420 is a Modbus sensor interface which allows a 4-20mA or voltage output sensor to appear as a Modbus RTU Slave on an RS485 multidrop bus.

The KDMON is a system monitoring device which can monitor DC voltage, 4-20mA  current, presence/absence of data on an RS485 or RS232 bus, specific byte strings on an RS485 or RS232 bus, bit patterns in the registers in an RS485 Modbus Slave device or the closure of an external relay contact. Alarms are notified by SMS, email, fax or a relay contact.