Monitors important data
Get alerts via text message.
Saelig Co. Inc.’s KDMON system monitoring device checks various industrial equipment’s electrical signals of industrial equipment. This includes data such as analogue voltages between -30 to +30 V, analogue currents from 4 to 20 mA, the presence or absence of data on an RS485 bus, the contents of registers in an RS485 MODBUS Slave device, or a relay contact closure. The device then relays signals by SMS text message, e-mail or fax.
It also acts as a protocol-independent communications monitor to trigger an alarm upon a specific byte sequence, or a lack of bus activity. This function works on two-wire RS485 or a 4-wire RS485 or RS422 system.
Users are able to configure a range of alarm conditions and notification via a serial configuration port (RS232 or USB via converter cable) using the supplied Windows-based configuration program and an external modem. Modem type depends on the notification required. SMS transmission requires an external GSM modem (industrial or data-capable GSM, or a satellite phone) that supports the GSM/Hayes command set.
SMS features triggering of simulated alarms, resetting alarms, and setting KDMON real time clock or SMS to an e-mail gateway for system testing.
Transducer current is passed through a 47 ohm resistor and the voltage drop across it is measured using a 12-bit A-D converter. KDMON provides an unregulated -20 V output and relay output is a normally-open isolated contact that closes when an alarm occurs, opening after a programmed time or when the alarm is cleared.
The monitoring devices require a 7-35 VDC, 300 mA power supply and operate in temperatures between -20 to 50 degrees C. It clips to a standard 35-mm DIN rail and is housed in a 1.2 x 4.5 x 3.8-in. case.
Saelig is a supplier of test and measurement and control products based in Fairport, NY.