MODEL ORS-300 ELECTRO-MAGNETIC SWITCHES DESCRIPTI0N The Model ORS-300 reed switch is available to augment the control capabilities of Orion’s extensive line of magnetic level indicators. Housed in an explosion proof stainless steel enclosure, the ORS-300 mounts to the outside of the MLI via clamps. This mounting style allows addition or repositioning of switches at any time, without disruption of the process. Each switch is designed for optimal repeatability and reliability. The magnetic field produced by the MLI float actuates the ORS-300 when the liquid level moves the float into the proximity of the reed switch. The switch is bi-stable, so it will not reset until the float’s magnetic field passes it in the opposite direction. Model ORS-300 For use in Installation Category II, Pollution Degree 2. If equipment is used in a manner not specified by the manufacturer, protection provided by the equipment may be impaired. S P E C I F I C AT I O N S Model Type Contacts Supply voltage Contact rating Maximum load Dead band Switch temperature range Enclosure rating Enclosure material Mounting AGENCY ORS-300E-001 Bi-stable, reed switch One SPDT 125 - 250 VAC/VDC 1.0 amps 25 Watts ±0.50" (13 mm) float travel -58° to +325° F (-50° to +163° C) NEMA 4X/7/9 316 stainless steel Clamp mount to MLI MODEL APPROVAL CATEGORY FM & CSA ORS-300E-001 Class I, Div. 1, Grps B, C, & D Class I, Div. 2, Grps A, B, C, & D Class II, Grps E, F, & G Class III, TYPE 4X CE ORS-300E-001 Installation Category II, Pollution Degree 2 Low Voltage Directives, 73/23/EEC & 93/68/EEC per Harmonized Standard EN 61010-1/1993 & Amendment No. 1 MOUNTING GEMINI 3.0 (76) REF. TO AT L A S OR CAUTION: If equipment is used in a manner not specified by the manufacturer, protection provided by the equipment may be impaired. With mounting clamps loosened, position ORS-300 reed switch on the MLI body so that the centerline of the stainless steel tube which houses the switch is at the desired switch point level. The switch should be oriented so that the green ground screw is closest to the top of the MLI. Tighten the clamps so that the switch is secured to the MLI. If required, place the insulation between the MLI body and the switch before tightening the clamps. MOUNTING TO AURORA Follow procedure for mounting to Atlas or Gemini, but ensure that the switch is positioned on the circumference of the Aurora body as close to the indicator as possible. FLOAT ABOVE SWITCH 8-32 Ground Screw 1 (RED) WIRING 3.00 (76.2) 0.84 (21.3) C (WHITE) The leads protruding from the potted end of the switch housing are color coded as follows: 3.00 (76.2) 2 (BLACK) FLOAT BELOW SWITCH 1 (RED) 1/2" MNPT 1.00 (25.4) White = Common Black = Normally Closed Red = Normally Open C (WHITE) 2 (BLACK) Note: For supply connections, use wire with a minimum rating of +167° F (+75° C) as required by the process conditions. Use a minimum of 14 AWG wire for power and ground field wires. Note: Housing must be grounded via protective ground screw in base of housing. CAUTION: In hazardous areas, do not power the unit until the conduit is sealed and the enclosure is screwed down securely. SWITCH FOR ATLAS O R S - 3 Electric bi-stable 1 amp SPDT reed switch in stainless steel clamp-mounted housing, NEMA 4X/7/9 ENCLOSURE 0 2 3 O R S 3 Standard enclosure Standard enclosure with cast aluminum junction box with terminal block (ORS-3 only) Standard enclosure with stainless steel junction box with terminal block (ORS-3 only) 0 E 0 0 1 A Magnetrol Company 6646 Complex Drive • Baton Rouge, Louisiana 70809 • 225-906-2343 • Fax 225-906-2344 • www.orioninstruments.com Copyright © 2003 Magnetrol International, Incorporated. All rights reserved. Printed in the USA. Magnetrol and Magnetrol logotype are registered trademarks of Magnetrol International. Performance specifications are effective with date of issue and are subject to change without notice. The brand and product names contained within this document are trademarks or registered trademarks of their respective holders. BULLETIN: ORS-300.1 EFFECTIVE: March 2004 SUPERSEDES: January 2003