SGE985 Limit Switch
Description
The SGE985 Limit Switch serves as end position signaling of actuators and can be mounted to stroke actuators as well as to rotary actuators. It is constructed with inductive sensors or micro switches and signalizes exceeding or declining of two adjustable positions.
FEATURES
- Inductive limit switch according to DIN 19 234 rsp. NAMUR or three-wire system
- Variable switching functions
- Precise switching points through adjustable transmission
- The switches can be set precisely, even with very small strokes – independently one of the other
- Designed for stroke valves
- Specially suitable for small strokes by using a movement amplification mechanism
- Robust design; low vibration effect in all directions
- Mounting according to DIN IEC 534 part 6 (NAMUR)
- Rotation adapter for angles up to 120 °
- Explosion protection: II 2 G Ex ib/ia IIB/IIC T4/T6 according to ATEX, class I, zone 0 or 1, groups IIC, IIB, IIA class I, division 1, groups A, B, C, D, acc. to CSA; Explosion protection according to CU TR
- EMC in accordance with international standards and laws (CE)
TECHNICAL DATA
Input
| Stroke | up to 100 mm with standard attachment kit for diaphragm actuators; for larger stroke please consult us |
| Rotary angle | up to 120 °with attachment kit for rotary actuators |
Output Inductive Limit Switch, two-wire system Code S, T
| Output | 2 inductive proximity sensors acc. to DIN 19 234 resp. NAMUR for connection to a switching amplifier with intrinsically safe control circuit 1) 2) 3) Code S . . Sensors SJ3.5-N from Pepperl+Fuchs Code T . . Sensors SJ3.5-SN from Pepperl+Fuchs Code T + ECEP EP0094 . . Sensors SJ3.5-S1N from Pepperl+Fuchs |
Current consumption
| Vane clear | > 3 mA |
| Vane interposed | < 1 mA |
For control circuit with the following electrical values
| Supply voltage | DC 8 V, Ri approx. 1 kΩ |
| Residual ripple | < 5 % |
| internal inductance | 160 µH |
| internal capacitance | 20 nF |
| Perm. line resistance | < 100 Ω |
| Switching differential | < 1 % |
Output Inductive limit switch, three-wire system Code U
| Output | 2 inductive proximity sensors, three-wire system, contact, PNP 2) 4), LED indication Code T . . Sensors SB3.5-E2 from Pepperl+Fuchs |
| Supply voltage US | DC 10 to 30 V |
| Residual ripples | ± 10 %, US = 30 V |
| Switching frequency | 2 kHz |
| Constant current | 100 mA |
| Switching differential | < 1 % |
Output Limit switch assy. with micro switches Code V
| Output | 2 micro switches |
| Code V | Switch V4NT7UL from Saia Burgess |
Connected load, alternating current
| Switching capacity | max. 250 VA |
| Switching voltage | max. 50 V |
| Switching current with | |
| Ohmic resistance | max. 5 A |
| inductive resistance | max. 2 A |
| Bulb, metal filament | max. 0.5 A |
Connected load, direct current
| Switching voltage | Ohmic load | Inductive load |
| max. 30 V max. 50 V | max. 5 A max. 1 A | max. 3 A max. 1 A |
| Switching differential | < 2.5 % |
Response characteristic
| Gain | continuously adjustable from 1:1 to approx. 7:1 |
| Switching point repeatrability | < 0.2 % |
Ambient conditions
Temperature
| Code S | –25 to 85 °C / –13 to 185 °F |
| Code T | –40 to 85 °C / –40 to 185 °F |
| Code T with EAC Cert | –60 to 85 °C / –76 to 185 °F |
| Code U | –25 to 70 °C / –13 to 158 °F |
| Code V | –40 to 85 °C / –40 to 185 °F |
| Relative humidity | up to 100 % |
| Transport and storage Temperature | –40 to 85 °C / –40 to 185 °F |
| with EAC Cert | –60 to 85 °C / –76 to 185 °F |
| Protection class | IP 65 |
The device can be operated at a class D1 location according to DIN IEC 654, part 1
MountingFor attaching to diaphragm actuators acc. to DIN IEC 534-6 (NAMUR) and to rotary actuators acc. to VDI/VDE 3845
| Mounting orientation | any |
Electric connection
| Line entry | 1 cable gland M20x1.5 (others with Adapter AD-...) |
| Cable diameter | 6 to 12 mm (0.24 to 0.47 in) |
| Screw terminals | Screw terminals for wires up to 2.5 mm2 (AWG 14) |
Materials
| Housing and cover | Aluminium (Alloy No. 230) finished with DD varnish |
| Control vanes | Aluminium |
| Setting mechanism | Fiber glass reinforced polyamide |
| Transmission shaft | 1.4571 |
| Mounting bracket | 1.4301 |
Weight
| SGE985 | approx. 0.6 kg (1.3 lbs) |
SAFETY REGULATIONS
ATEX Explosion protection
| Inductive proximity sensor | Type SJ 3,5-N resp. Type SJ 3,5-SN (security version) |
| Type of protection | II 2 G Ex ib/ia IIB/IIC T4/T6 |
| Certificate of conformity | PTB 02 ATEX 2153 (Option Limit switch) |
For operation in certified intrinsically safe circuits with the following maximum values:
| Umax | 16 V |
| Imax | 25 mA |
| Pmax | 64 mW |
| Internal inductance | 100 µH |
| Internal capacitance | 30 nF |
The certificate of conformity refers to the inductive sensor installed. Mounting conforms to the stipulations of the certificate and the mounting conditions.
CSA Explosion protection
Class I, zone 0 or 1, groups IIC, IIB, IIA
Class I, division 1, groups A, B, C, D, acc. to CSA
CE Marking
Electromagnetic compatibility 2004/108/EC
| Low voltage regulations | w/o Ex: 73/23/EWG fulfilled (with Ex: not applicable) |
Electromagnetic compatibility EMC
| Operating conditions | Industrial environment |
Immunity according to
| NAMUR recommendation NE21 | fulfilled |
| EN 61 326 | fulfilled |
| EN 61 000-6-2 | fulfilled |
Emission according to
| EN 55 011, Group 1, Class A | fulfilled |
| EN 61 000-6-2 | fulfilled |
Safety requirements
| Safety | Safety class III |
| as per DIN EN 61010-1 (DIN IEC 61010-1) (VDE 0411 part 1) Overvoltage category | 1 |
| Infernal fuses | None |
| External fuses | Limitation of power supplies for fire protection has to be observed due to EN 61010-1 9.3. ff. |
SWITCHING FUNCTIONS
The switching functions may be freely selected and set. The control vanes may be adjusted as desired in order to reach the wanted switching behavior. The illustration here shows the four basic settings and adjacent the respective switch behavior (gray = immersed vane).
The examples are based on the following setting: Mounting left = feedback level right; transmission is selected so that at stroke x from 0 to 100 % the guidance shaft travels through a rotary angle of 180°. Illustrated in resting position x = 0%
2-wire technique: If control vane is immersed the initiator power circuit becomes high-ohmic
3-wire technique: If control vane is immersed the contact is closed against plus.
Micro switch: Contact opens during passing of the control vanes.
MODEL CODES SGE985
MODEL CODES ACCESSORIES
Dimensions
Attachment kit for diaphragm actuators
Attachment kit for rotary actuators
Typical Application
Download Datasheet PSS_EVE0201_A-en_SGE985_LimitSwitch.pdf If you require further information on this product or would like a quotation, please contact dp-flow on: email:
sales +44(0)1865 600245