Indication of important instructions and information...............5 Signs and symbols............................5 Service and Support............................5 Training courses and seminars........................6 Delivery conditions............................6 Inspection, transport and storage......................6 Warranty and liability.............................6 Disposal of Bender devices..........................7 1.10 Safety..................................7 Function..........................8 Intended use..............................8 Product description............................8 Device features..............................8 Functional description...........................
Page 4
Table of contents Settings..........................23 Set alarm for insulation fault........................23 Set measuring speed........................... 23 Parameter setting of the insulation fault location................24 Deactivate device............................25 Resetting alarm messages......................... 25 Parameterisation with the “iso1685 Set” software................25 Device communication....................26 RS-485 interface............................. 26 BMS protocol..............................28 8.2.1 Set BMS addresses............................
Temperature range Recycling RoHS directives Service and Support Information and contact details about customer service, repair service or field service for Bender devices are available on the following website: Fast assistance | Bender GmbH & Co. KG. isoPV1685P_D00007_09_M_XXEN / 07/2024...
Regular face-to-face or online seminars for customers and other interested parties: www.bender.de > know-how > seminars. Delivery conditions The conditions of sale and delivery set out by Bender GmbH & Co. KG apply. These can be obtained in printed or electronic format. The following applies to software products: "Software clause in respect of the licensing of standard software as part of deliveries,...
ISOMETER® isoPV1685P Disposal of Bender devices Abide by the national regulations and laws governing the disposal of this device. For more information on the disposal of Bender devices, refer to www.bender.de > service & support. 1.10 Safety If the device is used outside the Federal Republic of Germany, the applicable local standards and regulations must be complied with.
• SD card with data logger and history memory for alarms • Digital input • Separate relays for insulation fault 1, insulation fault 2 and device error Interfaces • RS-485 interface for data exchange with other Bender devices • BMS bus via RS-485 interface isoPV1685P_D00007_09_M_XXEN / 07/2024...
ISOMETER® isoPV1685P Functional description Insulation monitoring is carried out using an active measuring pulse which is superimposed onto the IT system to earth via the integrated coupling. If the insulation resistance between a PV system and earth falls below the set prewarning response value R , the LED ALARM 1 lights up and relay K1 switches.
Function 2.4.2 Insulation monitoring For insulation monitoring, a pulsating AC measuring voltage is superimposed onto the IT system. The measurement pulse consists of positive and negative rectangular pulses of equal amplitude. The period depends on the system leakage capacitance in each case and the insulation resistance of the PV system to be monitored.
ISOMETER® isoPV1685P ADVICE Insulation resistance measurement and mains coupling During the insulation fault location process, the measurement of the insulation resistance is deactivated and the coupling is disconnected from the mains. If during the insulation fault location the locating current falls below the value measurable by the EDS, the insulation fault location is terminated by the ISOMETER ®...
Function Automatic self test All supply voltages are continuously monitored. The following tests are continuously carried out in the background: • E-KE connection • Temperature monitoring of the coupling • Reverse polarity of mains with DC coupling • Measuring voltage generator A self test is automatically run at 24-hour intervals.
Device overview Terminals Figure 3-1: Terminals from below Figure 3-2: Terminals from above View from below I2+, I2− Digital input: Without function I1+, I1− Digital input: Start insulation fault location in manual mode CAN1 / CAN2 without function RS485 Term. off / on RS-485 termination A, B, S RS-485 bus connection (A,B)
ISOMETER® isoPV1685P Display and operating elements ON (green) Power ON indicator: Flashes with a pulse duty factor of approx. 80 %. Device error: Lights continuously when the device stops functioning (device stopped). Software update: Flashes approx. three times faster during the firmware update than in the standard mode, update time <...
Page 16
Device overview Operating elements in the service lid Operating elements Function DIP switch (SS8103) • BMS address setting: A4…A0 • Leakage capacitance setting: 6 • Measurement speed setting: 7 Button (ST6101) Alarm reset Memory card slot Memory for log files and history memory (µSD card) isoPV1685P_D00007_09_M_XXEN / 07/2024...
ISOMETER® isoPV1685P Mounting Mount the device using four M5 screws. Refer also to the dimension diagram where the drilling holes are illustrated. Mount the device so that the control panel can be read during operation and the mains connection is (L1/+, L2/–) positioned at the top. Figure 4-1: Dimensions in mm CAUTION Damage due to unprofessional installation!
Connection Connection Connection requirements DANGER Risk of fatal injury due to electric shock! Touching live parts of the system carries the risk of: • Risk of electrocution due to electric shock • Damage to the electrical installation • Destruction of the device Before installing the device and before working on its connections, make sure that the installation has been de-energised.
ISOMETER® isoPV1685P Wiring diagram Connection to a DC-System Connection of an insulation fault location device (EDS) to the ISOMETER ® isoPV1685P CAUTION Malfunctions due to excessive locating current on sensitive system parts! The locating current flowing between the IT system and earth can cause controller faults in sensitive parts of the system, such as the PLC or relay.
Page 20
Connection Step-by-step connection of the ISOMETER ® Connect the device according to the wiring diagram. Proceed as follows: Connect terminals E and KE to earth (PE) Connect terminals A and B to the BMS bus Connect terminal S to the bus conductor shield (only at one end of the conductor) Connect terminals I1+, I1–...
ISOMETER® isoPV1685P Settings Set alarm for insulation fault You can set the limit values for prewarning (Alarm 1) and main alarm (Alarm 2) of the ISOMETER ® via a BMS gateway or BMS terminal programme. The activation or deactivation of the two alarm levels R and R be seen in the following graphic: An alarm becomes inactive when it has exceeded the hysteresis of the set trigger value.
Settings Parameter setting of the insulation fault location CAUTION Malfunctions due to excessive locating current Excessive locating current may cause malfunctions on sensitive system parts like PLC or relay. Ensure that the level of the locating current is compatible with the system to be monitored. Set the value of the locating current required for insulation fault location to 1...50 mA.
Bender provides this software free of charge and without warranty. By using the software, you agree to use the software at your own risk. Bender does not assume any warranty for possible software errors or defects and does not guarantee that the software will work error-free and reliably. Furthermore, Bender is not liable for any direct or indirect damage resulting from the use of the software.
Device communication Device communication RS-485 interface The RS-485 interface, galvanically isolated from the device electronics, serves as a physical transmission medium for the BMS protocol. When an ISOMETER® or other bus-capable devices are interconnected via the BMS bus in a network, the BMS bus must be terminated at both ends with a 120 resistor.
Page 27
Shielded cable, core diameter 0.8 mm (e.g. J-Y(St)Y 2x0.8), shield connected to earth (PE) on one end. The max number of bus nodes is restricted to 32 devices. If more devices are to be connected, Bender recommends the use of a DI1 repeater.
Device communication BMS protocol BMS protocol This protocol is an essential part of the Bender measuring device interface (BMS bus protocol). Data transmission generally makes use of ASCII characters. Interface data are: • Baud rate: 9600 baud • Transmission: 1 start bit, 7 data bits, 1 parity bit, 1 stop bit (1, 7, E, 1) •...
ISOMETER® isoPV1685P The BMS address can be changed using DIP switch SS8103. Factory setting = 2 DIP switch SS8103 Switch position BMS addr. Up = OFF (0) Down = ON (1) 8.2.2 Messages via the BMS bus Messages are transmitted to a maximum of 12 BMS channels. All alarm, operating and error messages are described below.
Device communication Operating messages Alarm Channel Meaning Insulation resistance Current insulation resistance R (if R > (R + Hysteresis)) Insulation resistance Current insulation resistance R (if R > (R + Hysteresis)) Leakage capacitance Leakage capacitance C in nF, F Mains voltage Current system voltage U Partial voltage U+/PE Current partial voltage terminal L1/+ to earth...
The error can also be reset by means of the acknowledgement command via the BMS bus. Firmware update via BMS bus The firmware is updated via the BMS bus with the 'BMS Update Manager', which is available from Bender. isoPV1685P_D00007_09_M_XXEN / 07/2024...
Technical data Technical data Diagrams System leakage capacitance The determination of the leakage capacitance depends on the size of the insulation resistance. Examples – minimum measurable leakage capacitance at R = 50 k : 35 µF – minimum measurable leakage capacitance at R = 5 k : 210 µF Response time ADVICE...
Technical data Permissible extraneous DC voltage U ≤ DC 1500 V Permissible system leakage capacitance C ≤ 2000 F Response values for insulation monitoring Response value R (Alarm 1) 200 … 1 M Response value R (Alarm 2) 200 … 1 M Upper limit of the measuring range when set to C = 2000 F 50 k...
Page 35
ISOMETER® isoPV1685P Device address, BMS bus adjustable (DIP switch) 2…33 Switching elements Switching elements 3 changeover contacts Insulation fault alarm 1 Insulation fault alarm 2 Device error Operating principle K1, K2 N/C operation, N/O operation Operating principle K3 N/C operation, cannot be changed Contact data acc.
Page 36
Technical data Environment/EMC IEC 61326-2-4 Ed. 1.0 Ambient temperature during operation −40…+ 70 °C Ambient temperature transport −40…+ 80 °C Ambient temperature long-term storage −25…+ 80 °C Relative humidity 10…100 % Classification of climatic conditions acc. to IEC 60721: Stationary use (IEC 60721-3-3) 3K23 Transport (IEC 60721-3-2) 2K11...
ISOMETER® isoPV1685P Standards and approvals The ISOMETER® isoPV1685P was developed in compliance with the following standards: • DIN EN 60664-1 (VDE 0110-1) • DIN EN 61557-8 (VDE 0413-8) • IEC 60730-1 • IEC 61326-2-4 • IEC 61557-8 • IEC 61557-9 •...
Need help?
Do you have a question about the ISOMETER isoPV1685P and is the answer not in the manual?
Questions and answers