Important Notes Usage for the intended purpose Use level electrode type NRG 16-41, NRG 17-41 or NRG 19-41 only in conjunction with control equipment NRS 1-41 or NRS 1-40.1 as high-water level limiter (high-level alarm). Use level electrode type NRG 16-41.1, NRG 17-41.1 or NRG 19-41.1 only in conjunction with control equipment NRS 1-40.1 as high-water level limiter (high-level alarm).
The NRG 1...-41 is to be used in conjunction with the switching controller NRS 1-41 or NRS 1-40.2, the NRG 16-41.1 is designed for use with switching controller NRS 1-40.1. The level data are transferred from the electrode NRG 1...-41 and NRG 1...-41.1 to the control equip-...
Control terminal and display unit Functions: Parameterization and visual display (LCD) Data exchange: CAN bus to DIN ISO 11898 using CANopen protocol. Design NRG 16-41, NRG 16-41.1, NRG 17-41, NRG 17-41.1, NRG 19-41, NRG 19-41.1: Screwed ¾", EN ISO 228-1. Fig. 2, Fig. 3...
Design / Functional Elements – continued – Electrode rod Bore Spring Electrode tip S. S. joint ring D 27 x 32 mm to DIN 7603 (made of 1.4301), bright annealed Seating surface Electrode thread Screws M 4 M 12 sensor plug, 5 poles, A-coded, M 12 sensor socket, 5 poles, A-coded Cover LED green “Program running”, LED red “CAN bus communication”...
Installation – continued – Flange PN 40, DN 50, DIN 2527 Flange PN 40, DN 100, DIN 2527 For the approval of the boiler standpipe with connecting flange the relevant regulations must be considered. Vent hole (Provide vent hole as close to the boiler wall as possible) High water level (HW) Electrode rod d = 8 mm Protection tube DN 80...
Electrical Connection Aligning terminal box . Fig. 13 1. Unscrew screws and remove cover 2. Loosen nut with 19 mm spanner. Do not remove it! Fig. 14 The electrode terminal box can now be turned through +/– 180°. 3. Turn electrode terminal box into desired position (+/– 180°). 4.
Electrical Connection – continued – Wiring diagram for the sensor plug-in connections 120 Ω 120 Ω Fig. 14 Fig. 15 Fig. 16 RES 1 RES 2 Terminating resistor 120 Ω, RES 1 or RES 2 CAN bus line, twisted pair control cable Pin 1: Screen Pin 2: Power supply 24 V DC+ (red) Pin 3: Power supply 24 V DC–...
Electrical Connection – continued – CAN bus wiring diagram URB 2 NRS, NRR, LRR, NRG, LRG, TRS, URB 1 EF, URZ RES 1 RES 2 Fig. 17 Attention Wire equipment in series. Star-type wiring is not permitted! The Bus line must run separately from signal and mains lines. Link screens of control cables such that electrical continuity is ensured and connect them once to the central earthing point (CEP).
The four-core bus cable serves as power supply and data highway for high-speed data exchange. The CAN address (Node ID) can be set between 1 and 123. The equipment is configured at our works and ready for service with other GESTRA system components without having to set the node ID.
Basic Settings – continued – Factory set default values The level electrode features the following factory set default values: Baud rate: 250 kB/s Node ID: NRG 1...-41: 007, NRG 1...-41.1: 004 Assigning / changing node ID If several systems of the same kind are to communicate in one CAN bus network, be sure to assign one node ID for each individual system component (e.
Commissioning Procedure Check wiring Make sure that the level electrode NRG 1...-41, NRG 1...-41.1 is properly connected to the switching controller NRS 1-41, NRS 1-40.1, NRS 1-40.2 according to the wiring diagram. Fig. 13, 14 Apply mains voltage Apply power to switching controller NRS 1-41, NRS 1-40.1, NRS 1-40.2. Operation High-water level limiter (Max alarm) Used in combination with switching controller NRS 1-41, NRS 1-40.1, NRS 1-40.2 in (pressurized)
Malfunctions Fault finding list for troubleshooting Equipment fails to work – Indication of a malfunction Fault: In spite of correct wiring and commissioning of the equipment an interference signal is indicated. Remedy: The interference signal is caused by H. F. interferences coming from the installati- on.
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