PRS 9 Installation Instructions 810407-00 Cycling Timer PRS 9 A Siebe Group Product 1
Dimensions / Parts Drawings 128.5 169 30.01 (6TE) Fig. 1 A B C D E I H G J F MAX 70 C Fig. 2 MAX 95 % 2
Key A B C D E F G H I J Switch S1 TIME DELAY Switch S2 PROGRAM SELECTION Relay 2 ENERGIZED Relay 1 DE-ENERGIZED 32 way Euro card connector LED OPERATION Pushbutton TEST LED VALVE CLOSED LED VALVE OPEN Fixing screws 3
Contents Important Notes Page Safety note... 6 Warning...6 Explanatory Notes Scope of supply...7 System description... 7 Function...7 Design...7 Technical data...8 Installation Design c / d...9 Attention...9 Tools... 9 Wiring Design c / d...10 Wiring diagram...10 Key to wiring diagram...10 Attention...11 Note...11 Basic Adjustments Select opening mode of the valve...12 Table 1 Opening mode of the valve...12 Adjust time delay...12 Table 2 Time delay...12 Commissioning Warning...13 Check valve function...13 Check wiring...13 Apply mains voltage...13 Check test function...13 Check switching function...13 4
Contents continued Annex Page Warning...14 Fault finding list...14 Declaration of conformity...14 5
Important Notes Safety note Use the cycling timer PRS 9 only in combination with GESTRA level switches NRS 2-4. Installation must only be performed by qualified staff. Qualified staff are those persons who through adequate training in electrical engineering, the use and application of safety equipment in accordance with regulations concerning electrical safety systems, and first aid & accident prevention have achieved a recognised level of competence appropriate to the installation and commissioning of this critical safety device. Warning The terminal strip of the PRS 9 is live during operation. This presents the danger of electric shock. Cut off power supply before opening the equipment and before inserting or removing the 19" slide-in unit. 6
Explanatory Notes Scope of supply PRS 9, design c 1 Cycling timer type PRS 9 2 Guide rails 1 32pole screw-type connector 1 Installation instructions PRS 9, design d 1 Cycling timer type PRS 9 1 Installation instructions System description The PRS 9 is an analogue/digital cycling timer. In combination with up to four level switches type NRS 2-4 / NRS 2-5 and a position-controlled limit switch the cycling timer can, as part of a controlled draining system in a power station, control drain valves as a function of time. Function Signals coming to the inputs of the level switches and the position-controlled limit switch will be processed electronically, with the time delay adjusted in the equipment being taken into account. Dependent on the adjustment the drain valve will be controlled in one or two steps with a time delay. Design Design c 19" slide-in unit with guide rails and 32pole screw-type connector for installation in 19" magazine acc. to DIN 41494, part 5. Design d 19" spare slide-in unit 7
Technical data Supply voltage 24 V DC Power consumption 4 VA Input Three control inputs (volt-free relay contacts) Control voltage 12 V DC Output 2 volt-free relay contacts Max. contact rating with a switching voltage of 24 V, 115 V and 230 V AC: 4 A resistive, 0.75 A inductive at cos ϕ 0.5. Max. contact rating with a switching voltage of 24 V DC: 4 A. Service life of the relays: 30 x 10 6 switching cycles. Indicators and adjustors 1 green LED OPERATION, 1 red LED VALVE OPEN, 1 red LED VALVE CLOSED 1 pushbutton TEST (simulating alarm signalled by P1) 1 switch (on the circuit board) for program selection 1 switch (on the circuit board) for time delay setting Protection IP 10 to DIN 40050 Admissible ambient temperature 0 C to +70 C Case 19" slide-in unit with front panel to DIN 41494 part 5 and rear 32 way Euro card connector to DIN 41612 for installation onto 19" magazine. Front panel: Aluminium Wiring via 32 pole screw-type connector at the back of the 19" magazine, max. conductor size 1.5 mm 2 Weight approx. 0.6 kg 8
Installation Design c / d 1. Install the guide rails and the screw-type connector in the 19" magazine. 2. Introduce the 19" slide-in unit onto the guide rails until it hits the stop. 3. Tighten the fixing screws J. Tools Attention To provide sufficient ventilation, ensure a minimum spacing of 20 mm between adjacent units. Screwdriver for slotted screws, size 5, completely insulated according to VDE 0680. 9
Wiring Design c / d Wiring is effected via the 32 pole screw-type connector. Wiring diagram PRS 9 4 5 Fig. 3 1 2 3 Key to wiring diagram 1 2 3 4 5 P2 Level switch NRS 2-4 or NRS 2-5 (24 V DC) from corresponding level electrode 2 Position-controlled limit switch of the drain valve P1 Level switch NRS 2-4 or NRS 2-5 (24 V DC) from level electrode 1 Rel 2 for opening the drain valve Rel 1 for closing the drain valve 10
Attention Fuse supply cable with T 2.5 ma. When switching off inductive loads, voltage spikes are produced that may impair the operation of control and measuring systems. Inductive loads should be provided with commercial arc suppressor RC combinations, e. g. 0.1 µf/100 Ω. Note Connect only volt-free relay contacts to the control inputs. The cycling timer PRS 9 supplies a 12 V DC control voltage. 11
Basic Adjustments Select opening mode of the valve Use switch S2 B for selecting the opening mode, see table 1. Table 1 Opening mode of the valve Switch position Opening mode of the valve 1 Two-step opening of the valve 2 One-step opening of the valve Adjust time delay Use switch S1 A for setting the time delay, see table 2. Table 2 Time delay Switch position Time delay 1 5 sec. 2 7.5 sec. 3 10 sec. 4 15 sec. 5 22.5 sec. 6 30 sec. 12
Commissioning Warning The terminal strip of the PRS 9 is live during operation. This presents the danger of electric shock. Cut off power supply before undertaking any work at the equipment and before inserting or removing the 19" slide-in unit. Check valve function 1. Drive drain valve manually into the mid-position. 2. Apply mains voltage for about 10 sec. P1 and P2 must not give a signal and check whether the valve moves into the closed position. Check wiring 1. Check whether the 19" slide-in unit has been properly introduced into the magazine. 2. Check whether the equipment has been wired in conformity with the mains voltage. Apply mains voltage 1. Switch on the mains voltage and check the equipment for power supply. The LED F functions as visual check. Check test function 1. Push button G and check whether the valve is opening. 2. Press and hold down button G until the valve has reached the position of the limit switch and the actuator has been switched off. 3. Release button G and check whether the valve returns to the closed position after the preset time delay has elapsed. Check switching function To check the switching functions raise or lower the water level until the switchpoints are reached or simulate the corresponding signals by disconnecting the control inputs of P1 3 and P2 1, Fig. 3 1. P1 and P2 are not giving signals: Check whether LED H is illuminated, REL1 D is energized and the valve is closing. 2. P1 or P2 is giving a signal: Check whether the LED I is illuminated, REL2 C is energized and the valve is opening. 3. P2 or if the valve is controlled only by P1 P1 is not giving a signal or the valve is in the intermediate position, no LED illuminated: Check whether the LED H lights up after the time delay, REL 1 D is energized and the valve is closing. 13
Annex Warning The terminal strip of the PRS 9 is live during operation. This presents the danger of electric shock. Cut off power supply before opening the equipment and before inserting or removing the 19" slide-in unit. Fault finding list The LED F is not illuminated after applying the mains voltage Fault: The mains voltage has not been switched on. Remedy: Switch on the mains voltage. Check the 19" slide-in unit for correct installation. No or incorrect functions Fault: The internal circuitry is defective. Remedy: Replace the cycling timer. Declaration of conformity We hereby declare that the equipment PRS 9 conforms to the following European guidelines: LV guideline 73/23/EWG version 93/68/EWG EMC guideline 89/336/EWG version 93/68/EWG which are based on the following harmonised standards: LV standard EN 60947-5-1: 1991 EMC standard EN 50 081-2, EN 50 082-2 This declaration is no longer valid if modifications are made to the equipment without consultation with us. Bremen, 28th April 1997 GESTRA GmbH Dr. Anno Krautwald Dr. Christian Politt 14
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