RDY4 - RDY8 Differential pressure switch with intrinsic safety Main Features Excellent repeatability Dead band adjustment for regulation Fix dead band for control and alarm Intrinsic safety Hazardous area 0, 1, 2 Applications Power generation safety equipment Pressurized chambers control Liquid level control Technical Data Pressure range 2 ... 10 mbar to 2.5 ... 30 bar Case Black Zamak Temperature Pressure range codes 111 to 157 Medium : -15 ... +150°C Ambient : -25 ... + 55°C Storage : -40 ... + 70°C Mounting Wall mounting braket Ground connection Via internal terminal block Electrical connection Electrical function Terminal block with plastic cable gland for Ø 7 to 10.5 mm Adjustment 2 external adjustment screws for set point and dead band. When set point adjustment is required it is necessary to know the static pressure, as it has an influence on the set point. Type examination certificate LCIE 03 ATEX 6123X EN 60079-0: 2012 (internal conformity analysis) EN 60079-11: 2012 Marking 0081 IM1 Ex ia I Ma II 1 G Ex ia IIC T6 or T5 Ga Electrical data Umax = 28 Vdc Imax = 120 mA Pmax = 0.84 W CE conformity Protection rating Low Voltage Directive LVD 2006/95/EC Pressure Equipment Directive PED 97/23/EC ATEX Directive 94/9/EC IP 66 (EN 60529) Process connection Stainless steel 1.4404 (316L) Sensing element Pressure range codes 111 to 157 Flanges :Stainless steel 1.4404 (316L) Diaphragm :Viton® Pressure range codes 211 to 256 Bellow :Stainless steel 1.4404 or 1.4432 (316L) Scale Cover Pressure range codes 257 and 258 Piston :Nickel plated steel Internal. Accuracy on reading ± 5% FS Zamak blue painted Captive stainless steel screws ATEX See ordering code details on page 5 Ci = Negligible ; Li = Negligible Customer specific set point adjustment Code SETP Oxygen application Code 0765 Mounting on 2" pipe Code 0407 Electrical connection: stainless steel connector (Souriau) Code 2298 Mobile plug for stainless steel connector (Souriau) Code 2249 Stainless steel tag plate and wire Code 9941 Lead seal of the adjustment screws Code 8990 www.baumer.com 2015-04-23 Options Design and specifications subject to change without notice Repeatability Pressure range codes 211 to 256 Medium : -50 ... +200°C Ambient : -25 ... + 55°C Storage : -40 ... + 70°C ± 1% F.S. @ constant pressure cycle Data sheet A32.21 Page 1 / 5 RDY4 - RDY8 Differential pressure switch with intrinsic safety Principle ∆P A flexible sensing element actuates a microswitch by means of a piston. The set point is adjusted by means of a compressible spring installed in opposition. NC NC NC C C C NO NO HP < LP NO HP > LP 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 NC C NC NC C C NO NO NO Customer speciffic factory adjustment (option SETP) The following specifications have to be given with the order: • Setpoint value • Adjustment on falling or raising pressure. • Static pressure • Dead band value when using an adjustable dead band switch Electrical connections 2 SPDT 1 SPDT NC Blue COM Red NO White NC Blue COM Red NO White NC Blue COM Red Yellow / green NO White Yellow / green Certified safety barrier NO C Non hazardous area NO or NC NC + Rc 1 Supply – Screen For max. ambient temperature refer to technical data on page 1. The installation must be made in an intrinsically safe circuit whose certified electrical safety parameters do not exceed any of the values Umax, Imax and Pmax given in the electrical data on page 1. 2015-04-23 All necessary measures must be taken by the user, to avoid the calorific transfer from the fluid to the apparatus head increasing the head's temperature to such that it reaches the self-ignition temperature of the gas in which it is used. Design and specifications subject to change without notice Hazardous area Zone 0, 1, 2 www.baumer.com Data sheet A32.21 Page 2 / 5 RDY4 - RDY8 Differential pressure switch with intrinsic safety Micro switches characteristics Switch code N (T) M (K) C (W) S Type Tropicalized Gold contact Hermetic Ultrasensitive Gold contact 6 Vdc 0.1 ... 0.12 A 10 ... 50 mA 5 ... 120 mA 10 ... 50 mA 12 Vdc N/A 10 ... 50 mA 5 ... 66 mA 10 ... 50 mA 24 Vdc N/A 10 ... 33 mA 5 ... 33 mA 10 ... 33 mA 30 Vdc N/A N/A N/A N/A 48 Vdc N/A N/A N/A N/A 110 Vdc N/A N/A N/A N/A 220 Vdc N/A N/A N/A N/A 115 Vac N/A N/A N/A N/A 250 Vac Dielectric rigidity between contacts and ground N/A N/A N/A N/A 2000 V 2000 V 1500 V 2000 V Adjustable ranges Scale mbar 2 ... 10 Max P Static Micro-switch dead band 1) Adjustable dead band Code N (T*) M (K*) Fixed dead band C(W*) 10% 90% 10% S 90% 10% 90% mbar bar 10 0.15 111 1.2 - 10 1.6 - 10 4.5 - 10 4.5 - 10 0.7 1.2 121 1.7 - 30 2.2 - 30 5 - 30 5.5 - 30 0.9 1.4 mbar 2 ... 50 50 0.15 2 ... 100 100 0.15 131 1.7 - 40 2.5 - 40 5.5 - 40 10 - 40 1.2 2 10 ... 200 200 1 156 8 - 80 10.5 - 80 25 - 80 40 - 80 5.8 9.5 400 1 157 15 - 150 20 - 150 30 - 150 45 - 150 10.5 17 0.06 0.09 10 ... 400 Code bar 0.05... 0.5 0.5 7 211 bar 0.09 - 0.3 0.1 - 0.3 0.15 - 0.4 0.2 - 0.4 0.05... 1 1 7 221 0.09 - 0.3 0.1 - 0.3 0.15 - 0.4 0.22 - 0.4 0.06 0.09 0.15... 0.5 0.5 30 214 0.14 - 0.5 0.18 - 0.5 N/A N/A 0.12 0.18 0.15... 1 1 30 224 0.2 - 0.6 0.25 - 0.6 N/A N/A 0.12 0.18 0.15... 4 4 30 234 0.21 - 1.5 0.27 - 1.5 0.65 - 2 0.8 - 2 0.12 0.18 0.8... 4 4 30 235 0.7 - 2.5 1.1 - 2.5 0.75 - 2.5 1.1 - 2.5 0.16 0.28 0.8... 10 10 30 245 0.7 - 2.5 1.1 - 2.5 0.75 - 2.5 1.1 - 2.5 0.16 0.28 1.5... 10 10 65 246 1.2 - 5 2.5 - 5 2.5 - 6 3.5 - 6 0.42 0.68 1.5... 20 20 65 256 1.2 - 5 2.5 - 5 2.5 - 6 3.5 - 6 0.42 0.68 2.5... 20 20 220 257 2.5 - 20 3.5 - 20 6 - 20 7 - 20 1.85 2.8 2.5... 30 30 220 258 3 - 30 4 - 20 6 - 20 7 - 20 1.95 2.8 (*) For version with 2 microswitches lower values of the dead band must be multiplied x 1.5 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%. 2015-04-23 1) Design and specifications subject to change without notice Max ΔP www.baumer.com Data sheet A32.21 Page 3 / 5 RDY4 - RDY8 Differential pressure switch with intrinsic safety Dimensions (mm) 125 76.5 = 144 139 = 58 130 5 64 100 45° Pressure range codes : 111 - 121 - 131 Weight : 3 kg Pressure range codes : 156 - 157 Weight : 2.8 kg 76.5 76.5 28.5 28.5 1/2 NPT(M) LP 80 78 LP HP Hex 24 HP 1/2 NPT(M) 46.5 70 Pressure range codes : 211 - 221 Weight : 3 kg 130 76.5 76.5 144 144 130 Pressure range codes : 214 - 224 - 234 - 235 - 245 - 246 - 256 - 257 - 258 Weight : 3 kg 28.5 124 28.5 60 124 LP 136 89 HP 60 HP LP 70 Ø 65 27 70 G 1/2(M) 2015-04-23 G 1/2(M) Design and specifications subject to change without notice Hex 24 www.baumer.com Data sheet A32.21 Page 4 / 5 RDY4 - RDY8 Differential pressure switch with intrinsic safety Ordering details RDY4 - RDY8 RD Model Differential pressure switch Approvals ATEX intrinsic safety Y . – xxx / RD Y Sensing element Diaphragm (Viton®, range 111 to 157) Bellow (stainless steel, range 211 to 256) or Piston (nickel plated steel, range 257 and 258) Type of micro switches Deadband 1 SPDT hermetically changeover switch Adjustable 2 SPDT hermetically changeover switch Adjustable 1 SPDT gold contact changeover switch Adjustable 2 SPDT gold contact changeover switch Adjustable 1 SPDT tropicalized changeover switch Adjustable 2 SPDT tropicalized changeover switch Adjustable 1 SPDT ultrasensitive gold contact changeover switch Fix Process connection G 1/2 male (standard) 1/2 NPT male 1/4 NPT female – 4 8 C W M K N T S 3 6 8 Pressure range (mbar) Pressure range (kPa) 2 ... 10 0.2 ... 1 2 ... 50 0.2 ... 5 2 ... 100 0.2 ... 10 10 ... 200 1 ... 20 10 ... 400 1 ... 40 Pressure range (bar) Pressure range (kPa) 0.05 ... 0.5 5 ... 50 0.05 ... 1 5 ... 100 0.15 ... 0.5 15 ... 50 0.15 ... 1 15 ... 100 0.15 ... 4 15 ... 400 0.8 ... 4 80 ... 400 0.8 ... 10 80 ... 1000 1.5 ... 10 150 ... 1000 1.5 ... 20 150 ... 2000 2.5 ... 20 250 ... 2000 2.5 ... 30 250 ... 3000 Options to be added behind the / (see example below) . 111 121 131 156 157 211 221 214 224 234 235 245 246 256 257 258 / Ordering example with options RD Y – 4 C 3 . 111 / 0407 _ 9941 Differential pressure switch With ATEX approval intrinsic safety Design and specifications subject to change without notice Diaphragm Viton® 1 SPDT hermetically changeover switch Process connection G 1/2 male Pressure range 2 ... 10 mbar Option : Mounting on 2" pipe 2015-04-23 Option : Stainless steel tag plate and wire www.baumer.com Data sheet A32.21 Page 5 / 5