RDE4 - RDE8 Differential pressure switch, explosion proof Main Features Excellent repeatability Dead band adjustment for regulation Fix dead band for control and alarm Explosion proof Hazardous areas 1, 2, 21, 22 Applications Power generation safety equipment Pressurized chambers control Liquid level control Technical Data Pressure range -2.5 ... 2.5 mbar to 2.5 ... 30 bar Mounting 3 back lugs for wall mounting Temperature Pressure range codes 110 to 157 Medium: -15 ... + 150 °C Ambient: -20 ... + 55 °C Storage: -40 ... + 70 °C Pressure range codes 211 to 258 Medium: -50 ... + 200 °C Ambient: -20 ... + 55 °C Storage: -40 ... + 70 °C ± 1% F.S. / constant pressure cycle Ground connection Via internal terminal block Electrical connection Terminal block with metallic cable gland for Ø 7 to 12 mm standard Electrical function See ordering code details on page 5 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 6231X (Type RA80) EN 60079-0: 2012 (internal conformity analysis) EN 60079-1:2007 EN 60079-31: 2009 Marking 0081 II 2 G D Ex d IIC T6 or T5 Gb Ex t IIIC IIC T80 °C or T95 °C Db IP6X CE conformity Protection rating Low Voltage Directive LVD 2006/95/EC ATEX Directive 94/9/EC IP 66 (EN 60529) Process Connection Stainless steel 1.4404 (316L) Sensing element Pressure range codes 110 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 Housing Pressure range codes 257 and 258 Piston:Nickel plated steel Internal. Accuracy on reading ± 5% F.S. ATEX T° ambient -20 °C to +60 °C (T6 or T80 °C) or -20 °C to +70 °C (T5 or T95 °C) Design and specifications subject to change without notice Repeatability Type RA80, explosion proof, flameproof Alumunium epoxy painted. Captive stainless steel screws Options Code SETP Oxygen application Code 0765 Lead seal of the adjustment screws Code 8990 Mounting on 2" pipe Code 0407 Stainless steel tag plate and wire Code 9941 2015-11-13 Customer specific set point adjustment www.baumer.com Data sheet A32.22 Page 1 / 5 RDE4 - RDE8 Differential pressure switch, explosion proof 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 C C NC C NO NO NO HP > LP 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 NO NC NC C C 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 (as needed) when using an adjustable dead band switch Electrical connections 2 SPDT 1 SPDT NC COM NO Blue Red White NC Blue COM Red NO White NC Blue COM Red NO White Yellow / green Hazardous areas : 1, 2, 21, 22 -20 °C ≤ Ta ≤ +70 °C Dust IP6x Gases T° surface Class Ta = 60 °C 80 °C T6 Ta = 70 °C 95 °C T5 Important: Maximum power dissipation in the case must not exceed 5 W 2015-11-13 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 Yellow / green www.baumer.com Data sheet A32.22 Page 2 / 5 RDE4 - RDE8 Differential pressure switch, explosion proof Micro switches characteristics Switch code A (B) Type M (K) Standard 6 Vdc Gold contact 10... 50 mA C (W) E (F) D (V) Hermetic Ultra sensitive Ultra sensitive Hermetic 0.4... 10 A 5 mA ... 4 A 0.4... 1A 0.4... 4A 12 Vdc 0.4... 10 A 10... 50 mA 5 mA ... 4 A 0.4... 1A 0.4... 4A 24 Vdc 0.4... 6A 10... 50 mA 5 mA ... 4 A 0.4... 1A 0.4... 4A 0.4... 1A 0.4... 30 Vdc 0.4... 6A 10... 10 mA 5 mA ... 3 A 48 Vdc 0.4... 6A 10... 50 mA 5 mA ... 3 A N/A N/A 110 Vdc 0.1... 0.5 A 10... 50 mA 5 mA ... 1 A N/A N/A 220 Vdc 0.1... 0.25 A 10... 50 mA 5 mA ... 0.5 A 115 Vac 0.4... 10 A 10... 50 mA 50 mA ... 3 A 250 Vac 0.2... 10 A 10... 10 mA Dielectric rigidity between contacts and ground 2000 V 2000 V N/A 0.4... 2A N/A 10 A N/A 50 mA ... 2.5 A 0.2 ... 10 A N/A 1500 V 2000 V 1000 V Adjustable ranges Scale mbar Micro-switch dead band (1) Adjustable dead band Code A (B*) M (K*) Fixed dead band C(W*) E(F*) 10% 90% 10% 90% 10% D (V*) 90% 10% 90% mbar bar 5 0.15 110 N/A N/A N/A N/A 0.45 0.6 N/A N/A 0.15 111 1.8 - 15 2.4 - 15 6.7 - 15 6.7 - 15 0.45 0.6 2.25 3 -2.5 ... 2.5 2 ... 10 Max P Static 10 mbar 2 ... 50 50 0.15 121 2.6 - 45 3.3 - 45 7.5 - 45 7.5 - 45 0.6 0.75 3 4.5 2 ... 100 100 0.15 131 2.6 - 60 3.7 - 60 8.2 - 60 15 - 60 0.75 1.05 3 4.5 19.5 10 ... 200 200 1 156 12 - 120 15.5 - 120 37 - 120 60 - 120 3.75 5.1 15 10 ... 400 400 1 157 22 - 225 30 - 225 45 - 225 67 - 225 6.75 9 27 Code bar mbar bar 36 bar 0.05... 0.5 0.5 7 211 0.13 - 0.45 0.15 - 0.45 0.22 - 0.6 0.3 - 0.6 37.5 45 0.17 0.18 0.05... 1 1 7 221 0.13 - 0.45 0.15 - 0.45 0.22 - 0.75 0.33 - 0.75 37.5 45 0.17 0.18 0.15... 0.5 0.5 30 214 0.22 - 0.75 0.27 - 0.75 N/A N/A 82.5 90 0.26 0.33 0.36 0.15... 1 1 30 224 0.22 - 0.9 0.3 - 0.9 N/A N/A 82.5 90 0.26 0.15... 4 4 30 234 0.22 - 2.2 0.37 - 2.2 0.97 - 3 1.2 - 3 82.5 97.5 0.26 0.4 235 1 - 3.7 1.6 - 3.7 1.12 - 3.7 1.6 - 3.7 105 150 1.26 2.03 4 4 30 0.8... 10 0.8... 10 30 245 1 - 3.7 1.6 - 3.7 1.12 - 3.7 1.6 - 3.7 105 150 1.26 2.03 1.5... 10 10 65 246 1.8 - 7.5 3.7 - 7.5 3.7 - 9 5.2 - 9 270 360 2.18 4.5 1.5... 20 20 65 256 1.8 - 7.5 3.7 - 7.5 3.7 - 9 5.2 - 9 270 360 2.18 4.5 2.5... 20 20 220 257 3.7 - 20 5.2 - 20 9 - 20 10 - 20 1200 1500 4.5 6.3 2.5... 30 30 220 258 4.5 - 30 6 - 30 9 - 30 10 - 30 1275 1500 5.4 7.2 (*) 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%. 2015-11-13 (1) Design and specifications subject to change without notice Max ΔP www.baumer.com Data sheet A32.22 Page 3 / 5 RDE4 - RDE8 Differential pressure switch, explosion proof Dimensions (mm) Set point adjustment Differential adjustment 56 (3x) Ø 9 on Ø 222 86 20 Ø 194 12 0° Weight: 4.4 kg 120° 116 RA 139 EE x d II C T 0° 6 12 Cable gland not mounted 121 Pressure range codes: 156 - 157 Weight: 1 kg Pressure range codes: 110 - 111 - 121 - 131 Weight: 1.8 kg LP 80 78 LP Hex 24 HP 70 46.5 G 1/2(M) Ø 220 Pressure range codes: 211 - 221 Weight: 1.6 kg 136 G 1/2(M) Ø 146 56 HP HP 86 Pressure range codes: 214 - 224 - 234 - 235 - 245 - 246 - 256 - 257 - 258 Weight: 1.2 kg Design and specifications subject to change without notice Hex 24 LP 89 70 HP LP Ø 65 27 70 G 1/2(M) 2015-11-13 G 1/2(M) www.baumer.com Data sheet A32.22 Page 4 / 5 RDE4 - RDE8 Differential pressure switch, explosion proof Ordering details RDE4 - RDE8 RD E Model Differential pressure switch Approvals Explosion proof Sensing element Diaphragm (Viton®, range 110 to 157) Bellow (stainless steel, range 211 to 258) 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 Process connection G 1/2 male (standard) 1/2 NPT male 1/4 NPT female . – xxx / RD E – 4 8 Deadband Adjustable Adjustable Adjustable Adjustable Fix Fix Fix Fix Adjustable Adjustable A B C W E F D V M K 3 6 8 . Pressure range (mbar) Pressure range (kPa) -2.5 ... 2.5 -0.25 ... 0.25 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) 110 111 121 131 156 157 211 221 214 224 234 235 245 246 256 257 258 / RD E – 4 C 3 . 111 / 0407 _ 9941 Differential pressure switch With ATEX approval Explosion proof Diaphragm Viton® 1 SPDT hermetically changeover switch Process connection G 1/2 male Pressure range 2 ... 10 mbar Option: Mounting on 2" pipe 2015-11-13 Option: Stainless steel tag plate and wire Design and specifications subject to change without notice Ordering example with options www.baumer.com Data sheet A32.22 Page 5 / 5