SSD Series – Riedon™ Digital Current Sensor with RS485/MODBUS Interface by Bourns

SSD Interface Manual (continued)

NOTE: No settings are saved until a save settings to EEPROM command is issued!

Power cycling will restore previous settings. See RESET command :1RS0F<cr>

Specifications are subject to change without notice.

Users should verify actual device performance in their specific applications.

The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.

GQ / SQ GET / SET VBUS OVER LIMIT

Used to configure the optional upper limit for bus voltage readings. Voltages above this value will cause an error that can be read with

the GET ERRORS command if errors aren’t automatically sent. A zero value disables this alert, non-zero values enable alert.

Value is an signed Int16 in Volts. Default VBUS OVER LIMIT: 0 (Disabled).

Example: Set the upper limit to 70 Volts

WRITE

READ

Send:

:1SQ70cr>

Send:

:1G4<cr>

Receive: (none)

Receive: 70<cr>

GU / SU GET / SET POWER OVER LIMIT

Used to configure the optional upper limit for power readings. Power above this value will cause an error that can be read with the

GET ERRORS command if errors aren’t automatically sent. A zero value disables this alert, non-zero values enable alert.

Value is an unsigned Int32 in Watts. Default POWER OVER LIMIT: 0 (Disabled).

Example: Set the upper limit to 22000 Watts

WRITE

READ

Send:

:1SU22000cr>

Send:

:1G5<cr>

Receive: (none)

Receive: 22000<cr>

GN / SN GET / SET SHUNT NANO-OHMS

Used to override the resistance of the SSD from the factory calibration. This is typically not necessary and the correct equipment is

essential to properly set it. Value can be reset back to factory defaults.

Value is an unsigned Int32 in nano-ohms.

Example: To set SHUNT NANO-OHMS to 300156 nano-ohms

WRITE

READ

Send:

:1SN300156cr>

Send:

:1GN<cr>

Receive: (none)

Receive: 330156<cr>

GH / SH GET / SET CURRENT ZERO OFFSET

Used to override the shunt zero offset current. Value can be reset back to factory defaults..

Value is a signed Int16 in mA.

Example: To set SHUNT OFFSET to +8 mA

WRITE

READ

Send:

:1SH8cr>

Send:

:1GH<cr>

Receive: (none)

Receive: 8<cr>