Allen-Bradley 1420-V1, User Manual, Page: 68 / 90

68 Rockwell Automation Publication 1420-UM001E-EN-P - March 2016
Appendix B Technical Specifications
Data (bidirectional)
Dynamic (reading only) System and phase variables: see the Modbus register tables in Appendix A
Static (reading and writing only) All configuration parameters; see the Modbus register tables in Appendix A
Data format One start bit, eight data bit, no/even/odd parity, 1 stop bit
Communication rate Selectable: 9.6, 19.2, 38.4, 115.2 Kbps
Note With the rotary switch (on the back of the basic unit) in lock position, modification of programming parameters and reset
command with serial communication are not allowed. In this case, just the data reading is allowed
Insulation See Table 44 Isolation Between Inputs and Outputs (1 minute)
Table 38 - Serial RS-485/RS-232 Communication Specifications (485 option)
Attribute Value
Table 39 - Energy Meters
Attribute Value
Meters
Total 4 (9+1 digit)
Partial 4 (9+1 digit)
Pulse output Connectable to total and/or partial meters
Energy meter recording Storage of total and partial energy meters. Energy meter storage format (EEPROM)
Min. -9,999,999,999.9 kWh/kVARh
Max. 9,999,999,999.9 kWh/kVARh
Energy meters
Total energy meters +kWh, +kVARh, -kWh, -kVARh
Partial energy meters +kWh, +kVARh, -kWh, -kVARh
Table 40 - Display, Status Indicators, and Commands
Attribute Value
Display refresh time
≤
100 ms
Display Four Rows of display each with a max of four digits,
1 Row of display with a max of 10 digits
Type LCD, single color backlight
Digit dimensions Four digits: h 9.5 mm; 10 digits: h 6.0 mm
Instantaneous variables read-out Four digits
Energy variables read-out Imported Total/Partial: 9+1 digit or 10 digits;
Exported Total/Partial: 9+1 digit or 10 digits (with ‘-’ sign)
Run hours counter 8+2 digits (99,999,999 hours and 59 minutes max)
Overload status EEEE indication when the value being measured is exceeding the ‘Continuous inputs overload’ (max measurement
capacity)
Max and min indication Max instantaneous variables: 9999; energies: 999,999,999.9 or 9,999,999,999
Min instantaneous variables: 0.000; energies 0.0
Front Position Status Indicators
Virtual alarms Four red status indicators available in case of virtual alarm (AL1-AL2- AL3-AL4).
The real alarm is just the activation of the proper static or relay output if the proper module is available
Energy consumption Red status indicator (only kWh)