User manual HONEYWELL S2 DATASHEET

[. . . ] 18 Pressure switches Mechanical pressure switches Mechanical pressure switches Te c h n i c a l f e a t u r e s / Advantages Diecast aluminium housing IP 54 or IP 65 version also available Wall mounting or directly on the pressure line Switching element (microswitch) Lead sealable setpoint adjustment Setting spindle locking element Terminal connection or plug connection to DIN 43 650 Form A Stainless steel sensor housing Stainless steel bellows with internal stop Pressure connection G 1/2" external G 1/4" internal Centring pin 26 Pressure switches Mechanical pressure switches Pressure switches General description Operating mode The pressure occurring in the sensor housing (1) acts on the measuring bellows (2). Changes in pressure lead to movements of the measuring bellows (2) which are transmitted via a thrust pin (4) to the connecting bridge (5). The connecting bridge is frictionlessly mounted on hardened points (6). When the pressure rises the connecting bridge (5) moves upwards and operates the microswitch (7). [. . . ] This is not possible with any other type series or with Ex versions. Technical data Standard equipment The standard equipment of every two-stage pressure switch includes a switching device with 2 microswitches, both single-pole switching. Switch I monitors the low pressure, switch II the higher pressure. The setting ranges indicated in the data sheets for the basic types apply to the two-stage pressure switches as well. It should be noted that the switching differentials of the individual microswitches may not be exactly the same due to component tolerances. Switching interval The switching interval of the two microswitches is the difference (in bar or mbar) between the switching points of the two microswitches. For example: When the pressure rises, a two-stage pressure switch turns on a warning light (e. g. 2. 8 bar), and if the pressure continues to rise (e. g. The switching interval is 3. 2­2. 8 = 0. 4 bar. For all versions the rule is: The switching interval remains constant over the whole setting range of the pressure switch. If the switching pressure setting is changed with the setting spindle, the switching interval does not change ­ the switching points are moved in parallel. Switching differential The switching differential, i. e. the hysteresis of the individual microswitches, corresponds to the values of the relevant basic design referred to in the Product Summary. In the case of twostage pressure switches, the switching differential of the individual microswitches is not adjustable. Versions Two-stage pressure switches are available in three different versions, each identified by a ZF number. The versions differ in terms of their connection schemes and electrical connection types (terminal or plug connection). The applicable data sheet for the basic types contains the technical data for the two-stage pressure switches. This includes all limits of use, temperature, maximum pressure, mounting position, type of protection, electrical data etc. The principal dimensions are the same as for single-stage pressure switches, with similar pressure ranges and design features. Additional Switching interElectrical function val between the connection two microswitches ZF 307 Factory setting according to customerspecifications Connection diagram Ordering information required Terminal connection 2 x single pole (All terminals of both switching. microswitches are accessible (6 terminals) 1. Switching points I and II, with direction of action in each case (rising or falling pressure). Example: DCM 16-307 Switching point I: 10 bar falling Switching point II: 12 bar falling or switching interval only. ZF 217 Adjustable via adjustment knobs I and II according to "Switching intervals" table Plug connection according to DIN 43 650 (3-pole + ground conductor) Function-appropriate internal wiring according to "Switching functions" table Example selection according to "Switching schemes" table, page 42. 1. Switching scheme Example: DCM 16-217/B 4 Since all values are adjustable within the specified limits, no further data is required. Pressure switches Mechanical pressure switches 41 S2 type series (selection) ZF 217 pressure switches with two microswitches and switching intervals S w i t c h i n g i n t e r v a l s o f t w o - s t a g e p re s s u re s w i t c h e s (ZF 217, ZF 307) Type series S2 ZF 217 ZF 307 Type higher pressure lower pressure min. [. . . ] If the differential pressure continues to rise (to >1. 2 bar), the circuit opens via 4­6 of the second microswitch, the relay drops out and the system shuts down. 36 Pressure switches Mechanical pressure switches DNS type series Pressure switch with stainless steel sensor system, with optional plastic-coated housing Pressure switches of the DNS series are suitable for monitoring and controlling pressures in chemical plants, process engineering and any situation where the pressure of aggressive liquids and gases must be monitored. All components of the sensor system are made from high-quality stainless steel (1. 4571) and welded using the latest methods without filler metals. The pressure sensor is hermetically encapsulated and contains no sealing materials. DNS 3-201 DNS 6-351 Technical data Pressure connection External thread G 1/2 (pressure gauge connection) according to DIN 16 288 and internal thread G 1/4 according to ISO 228 Part 1. Switching device Robust housing (200) made of seawater-resistant diecast aluminium GD Al Si 12. [. . . ]