GRUNDFOS MAGNA Relay Module

Installation and Operating Instructions

The relay module is an expansion module for the GRUNDFOS MAGNA pumps 25-60, 25-100, 32-60, 32-100, 40-100, 50-100. Note: The relay module cannot be used for the MAGNA D 40-100 (twin pump).

The relay module can be used for remote control and monitoring. The pump can be switched on/off via an external relay and provide fault, ready, and operation signals. These functions can be utilized via an external control system, e.g., a Building Management System (BMS).

The relay module offers the following functions:

• External ON/OFF, see Section 4.
• Fault, Ready, and Operation signals via reporting relay, see Section 5.

2. Connection

Electrical connection and required protection must be carried out by a qualified electrician in accordance with local regulations of the utility company or VDE. The relay module is wirelessly supplied with voltage via the pump. To ensure correct function, follow the instructions in Section 3.2 Module Mounting. Connect the module as shown in Figure 1.

Notes:

• All cables must be heat-resistant up to at least +85°C.
• All cables must be connected in accordance with EN 60204-1.
• The conductors to be connected to the outputs NC, NO, C and the input ON/OFF must be kept separate from each other.

Figure 1: Connection Terminals

Figure 1 shows the connection terminals. The 'Extern EIN/AUS' connection uses terminals 7 and 8. The 'Melderelais' connection uses terminals 1, 2, and 3, labeled NC, NO, and C respectively. See connection example on page 16.

3. Mounting

3.1 Cable Connection

Figure 2 illustrates the cable connection to the module, showing how cables are routed through the module's housing and connected to the terminals.

3.2 Module Mounting

1. Locate the two hooks on the module.
2. Carefully place the module onto the terminal box and press down until the hooks engage with the terminal box.
3. Check that the module sits flush against the terminal box.
4. Verify that the module's hooks are latched into the terminal box.
5. Secure the module with the provided screw.
6. The module is now correctly mounted.

4. External ON/OFF

The relay module has a digital input for an external contact. The pump can be switched on or off via this input. When switched on, the pump operates at the setpoint configured on the control panel or via the R100 remote control.

Note: If the external contact is used, the connection between terminals 7 and 8 must be replaced by the external connection.

Function Diagram: Input for ON/OFF

5. Reporting Relay

The function of the reporting relay can be selected using the R100. Possible functions include:

• Fault
• Ready
• Operation

5.1 Fault Signal

The reporting relay is activated in the following situations:

• Pump blocked
• Internal fault
• Undervoltage

Refer to Section 5.4 Function Diagram. When the fault is no longer present, the reporting relay is deactivated. The cause of the fault is stored in the alarm log. The last five faults can be retrieved using the R100.

Note: In case of a fault, the red indicator light on the control panel illuminates.

Refer to the Installation and Operating Manual for GRUNDFOS MAGNA 25-60, 25-100, 32-60, 32-100, 40-100(D), 50-100.

5.2 Ready Signal

The reporting relay is active when the pump is running or ready. Refer to Section 5.4 Function Diagram.

5.3 Operation Signal

The reporting relay is active as long as the pump is running. If the pump is switched off via the control panel, the R100, or due to a fault, the reporting relay is deactivated and sends a signal to, for example, a BMS.

Refer to Section 5.4 Function Diagram.

5.4 Function Diagram

5.5 Priority of Settings

External control commands restrict the setting options on the control panel and with the R100. On the control panel or with the R100, the pump can always be set to operation MAX curve or STOP. If two or more functions are activated simultaneously, the pump will operate according to the function with the highest priority.

The priority of settings for different operating modes is shown in the table:

Example: If the pump is switched to STOP via an external signal, the pump can only be set to MAX curve on the control panel or with the R100.

6. Troubleshooting Overview

[!] Before starting any work on the module, the supply voltage must be switched off. Ensure that it cannot be accidentally switched back on.

6.1 Module Check

Procedure:

1. Remove the module cover.
2. Check the indicator lights. If the pump is switched on and the module is correctly mounted, the left indicator light must blink and the right indicator light must be constantly lit.
3. Mount the module cover.

7. Technical Data

Technical changes reserved.