RDWN Differential pressure switch for variable static pressure Main Features Excellent repeatability Dead band adjustment for regulation Fix dead band for control and alarm Static pressure max. 20 bar No influence of the static pressure on the setpoint Applications Power generation safety equipment Pressurized chambers control Liquid level control Technical Data Pressure range 10 ... 200 mbar to 0 ... 2000 mbar Temperature Process : Ambient : Storage : -15 ... +150°C -25 ... +55°C -40 ... +70°C Repeatability ± 1% F.S. @ constant pressure cycle CE conformity Low Voltage Directive LVD 2006/95/EC Pressure Equipment Directive PED 97/23/EC IP 66 (EN 60529) Protection rating Electrical connection Electrical function Terminal block with plastic cable gland : - cable Ø 7 to 10.5 mm Adjustment 2 external adjustment screws on top of the case for set point and dead band. The adjustment is not influenced by changes of the static pressure. See ordering code details in page 5 Process Connection Stainless steel 1.4404 (316L) Sensing element Scale Housing Flanges : Stainless steel 1.4404 (316L) Diaphragm : Viton® Internal. Accuracy on reading ± 5% F.S. Case Zamak blue painted Captive stainless steel screws Zamak black Mounting Wall mounting braket Ground connection Via internal terminal block Code SETP Oxygen application Code 0765 Mounting on 2" pipe Code 0407 Stainless steel tag plate and wire Code 9941 Lead seal of the adjustment screws Code 8990 Mobile plug for stainless steel connector (Souriau) Code 2249 Electrical connection : stainless steel connector (Souriau) Code 2298 2015-04-17 Customer specific set point adjustment Design and specifications subject to change without notice Options www.baumer.com Data sheet A32.40 Page 1 / 5 RDWN Differential pressure switch for variable static pressure Principle ∆P A flexible sensing element actuates a microswitch by means of a lever. The set point is adjusted by means of a compressible spring installed in opposition. NC NC NC C C C NO NO NO Set point and reset point must be between 10% and 90% of the selected scale. Standard factory adjustment Setpoint at 50% of the scale on falling pressure Customer speciffic factory adjustment (option SETP) The following specifications have to be given with the order: • Setpoint value • Adjustment on falling or raising pressure • Dead band value when using an adjustable dead band switch NC C NC NC C C NO NO NO Electrical connections 2 SPDT 1 SPDT NC Blue COM Red NO White NC Blue COM Red NO Yellow / green NC COM NO White Blue Red White 2015-04-17 Design and specifications subject to change without notice Yellow / green www.baumer.com Data sheet A32.40 Page 2 / 5 RDWN Differential pressure switch for variable static pressure Micro switches characteristics Switch code Type 6 Vdc N (T) A (B) M (K) C (W) E (F) H D (V) J Tropicalized Standard Gold contact Hermetic Ultra sensitive Manual reset Ultra sensitive Hermetic Manual reset 10... 50 mA 5 mA ... 4 A 0.1... 8A 0.4... 10 A 0.4... 1A N/A 0.4... N/A 12 Vdc 0.1... 8A 0.4... 10 A 10... 50 mA 5 mA ... 4 A 0.4... 1A 0.4... 4A 24 Vdc 0.1... 8A 0.4... 6A 10... 50 mA 5 mA ... 4 A 0.4... 1A 0.1... 8A 0.4... 4A 0.1... 8A 30 Vdc 0.1... 8A 0.4... 6A 10... 10 mA 5 mA ... 3 A 0.4... 1A 0.1... 8A 0.4... 2A 0.1... 8A 48 Vdc 0.1... 8A 0.4... 6A 10... 50 mA 5 mA ... 3 A 0.1... 8A 0.1... 8A N/A N/A 4A N/A N/A 110 Vdc N/A 0.1... 0.5 A 10... 50 mA 5 mA ... 1 A N/A N/A N/A N/A 220 Vdc N/A 0.1... 0.25 A 10... 50 mA 5 mA ... 0.5 A N/A N/A N/A N/A 115 Vac 0.1... 10 A 0.4... 10 A 10... 50 mA 50 mA ... 3 A 10 A 0.1... 10 A N/A 0.1... 10 A 250 Vac 0.1... 5A 0.2... 10 A 10... 50 mA 50 mA ... 2.5 A 0.2 ... 10 A 0.1... 5A N/A 0.1... 5A 2000 V 1500 V 2000 V Dielectric rigidity between contacts and ground 2000 V 2000 V 0.4... 2000 V 1000 V 2000 V Adjustable ranges Scale mbar Max ΔP mbar Max P Static Micro-switch dead band 1) Adjustable dead band Code N (T*) A (B*) 10% bar M (K*) 90% Fixed dead band C(W*) 10% E(F*) 90% H 10% 90% 10% D (V*) J 90% mbar 10 ... 200 200 20 156 8 - 80 10.5 - 80 35 - 80 45 - 80 2.5 3.4 10 13 10 ... 400 400 20 157 15 - 150 20 - 150 40 - 150 50 - 150 4.5 6 18 24 10 ... 1000 1000 20 158 18 - 150 22 - 150 45 - 150 60 - 150 5 7 22 26.5 10 ... 700 700 20 161** 30 - 250 45 - 250 130 - 450 150 - 450 13 15 36 54 10 ... 1500 1500 20 162** 30 - 300 45 - 300 130 - 450 150 - 450 13 15 36 54 10 ... 2000 2000 20 163** 45 - 300 90 - 300 180 - 450 300 - 450 18 25 54 108 (*) For version with 2 microswitches lower values of the dead band must be multiplied x 1.5 (**) G1/4 female only The value of the dead band is depending on the value of the set point. This table contains the dead band values for set point adjustment at 10% and 90% of the selected scale. For adjustable dead band the lower value corresponds to the dead band spring totally released and the higher corresponds to the dead band spring fully tensed. For other set points the dead band value can be calculated by linear interpolation between the values at 10% and 90%. 2015-04-17 Design and specifications subject to change without notice 1) www.baumer.com Data sheet A32.40 Page 3 / 5 RDWN Differential pressure switch for variable static pressure Dimensions (mm) 125 76.5 = 144 139 = 58 130 5 64 100 45° Pressure range codes : 156-157-158 Weight : 6.6 kg Pressure range codes : 161-162-163 Weight : 7 kg 130 144 76,5 28,5 G 1/2 (M) LP HP HP 109 LP Ø100 2015-04-17 Design and specifications subject to change without notice 48 29,5 100 G 1/2 (M) 2 holes G 1/4 (F) Hex 24 Ø 148 www.baumer.com Data sheet A32.40 Page 4 / 5 RDWN Differential pressure switch for variable static pressure Ordering details RDWN RD WN Model Differential pressure switch for variable static pressure Approvals Standard version without ATEX approval Type of micro switches 1 SPDT standard changeover switch 2 SPDT standard changeover switch 1 SPDT hermetically changeover switch 2 SPDT hermetically changeover switch 1 SPDT ultra sensitive changeover switch 2 SPDT ultra sensitive changeover switch 1 SPDT hermetically, ultra sensitive changeover switch 2 SPDT hermetically, ultra sensitive changeover switch 1 SPDT gold contact changeover switch 2 SPDT gold contact changeover switch 1 SPDT tropicalized changeover switch 2 SPDT tropicalized changeover switch 1 SPDT changeover switch, manual reset, opening on raising pressure 1 SPDT changeover switch, manual reset, opening on falling pressure Pneumatic changeover contact, NO Pneumatic changeover contact, NC Type Standard Process connection G 1/4 female (only pressure ranges 161, 162, 163) G 1/2 male (standard) 1/2 NPT male 1/4 NPT female Pressure range (mbar) Pressure range (kPa) 10 ... 200 1 ... 20 10 ... 400 1 ... 40 10 ... 1000 1 ... 100 10 ... 700 1 ... 70 10 ... 1500 1 ... 150 10 ... 2000 1 ... 200 Options to be added behind the / (see example below) A – . xxx / RD WN Deadband Adjustable Adjustable Adjustable Adjustable Fix Fix Fix Fix Adjustable Adjustable Adjustable Adjustable Fix Fix – A B C W E F D V M K N T H J Z Y A H 3 6 8 . 156 157 158 161 162 163 Process connection G1/4 female Process connection G1/4 female Process connection G1/4 female Ordering example with options RD WN – A A 3 . 156 / 0407 _ 9941 Differential pressure switch for variable static pressure Without ATEX approval Design and specifications subject to change without notice 1 SPDT standard changeover switch Standard type Process connection G 1/2 male Pressure range 10 ... 200 mbar Option : Mounting on 2" pipe 2015-04-17 Option : Stainless steel tag plate and wire www.baumer.com Data sheet A32.40 Page 5 / 5