External Test/Reset Button (T/R); 2.3.10 Fault Memory; 2.3.11 History Memory His; 2.3.12 Digital Interface - Bender ISOMETER isoES425 Manual

2.3.9

External test/reset button (T/R)

Functions
• Reset = press the external button < 1.5 s
• Reset + self test = press the external button > 1.5 s
• Stop measuring function = press and hold the external button
When the measuring function is stopped, the display shows "StP".
Stop mode can also be triggered via an interface command, and in this case it can only be reset via the
interface.
Only one ISOMETER® may be controlled via an external test/reset button.
A galvanic parallel connection of several test or reset inputs for testing multiple insulation monitoring devices
is not allowed.

2.3.10 Fault memory

Disabled (OFF)
The LEDs and relays signal the fault as long as it is detected.
Enabled (ON)
The LEDs and relays signal the fault until a reset is performed or the supply voltage U

2.3.11 History memory HiS

The history memory saves exclusively the measured values for the first fault. The history memory must first be
cleared before new measured values can be saved.
The values checked in the table in section "Displaying measured values", page 21 can be saved.

2.3.12 Digital interface

The ISOMETER® uses the serial hardware interface RS-485 with the following protocols:
• BMS
The BMS protocol is an essential component of the Bender measuring device interface (BMS bus protocol).
Data transmission generally makes use of ASCII characters.
• IsoData
The ISOMETER® sends an ASCII data string with a cycle of approximately 1 second. Communication with
the ISOMETER® in this mode is not possible, and no additional sender may be connected via the RS-485 bus
cable. The ASCII data string for the ISOMETER® is described in chapter 5.2.
The IsoData protocol can be terminated by sending the command "Adr3" during a transmission pause
of the ISOMETER®.
The parameter address, baud rate and parity for the interface protocols are configured in the "out" menu.
isoES425_D00214_01_M_XXEN/10.2023
ISOMETER® isoES425
is disconnected.
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