![]() A Monthly Newsletter Focusing on Important Issues for the Automatic Door Industry | |||
| Monthly Newsletter - Issue 4 | November 2005 | ||
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Multiple Sensors, One Input Circuit N/O inputs (Parallel), N/C inputs (Series) By Jim Sargeant, Optex Technologies, Inc. | ||
![]() Jim Sargent When multiple sensors are connected into one input on an automatic door control box you must know if the input circuit requires a normally open (N/O) input or normally closed (N/C) input. When a control box requires a N/O input, commonly seen for activation, multiple sensors must be connected in parallel to the control box. When the input requires a N/C input, commonly seen on breakout circuits and some safety circuits, multiple sensors must be connected in series. Think of it as configuring the sensors and control box as what is referred to in Boolean Logic as an OR-GATE. The symbol below illustrates a two input OR-gate. If you have an input on input 1 OR input 2, OR both, you get an output. ![]() For example: input 1 is an interior motion sensor and input 2 is an exterior motion sensor and the output is door activation. If the interior sensor OR exterior sensor OR both sensors detect motion, you get door activation. Simple, right? Here is how the parallel and/or series connections are used to achieve the OR-Gate function. ![]() N/O INPUT --- PARALLEL CONNECTION The diagram below illustrates a door control with a N/O activation circuit. If a piece of wire were connected across activation to common (creating continuity) the door would activate open. ![]() When a motion sensor is connected to the input and the sensor detects motion, a N/O relay inside the sensor closes contact and connects the door controls activation input to common. This results in activating the door open. ![]() When connecting two or more motion sensors to the control (such as an Interior and an Exterior sensor or two-way traffic) the sensors must be connected in parallel as shown in the diagram below. This results in activation if the interior OR exterior, OR both, sensors detect motion. ![]() When incorrectly connecting the sensors in series (as illustrated below) both sensors must be in detection to achieve continuity between the control box activation and common inputs. This means both interior AND exterior sensors must be in detection to activate the door (NOT GOOD). We do not want an AND-Gate. We want an OR-Gate. ![]() N/C INPUT --- SERIES CONNECTION In this example the illustration below shows a breakout circuit on a simultaneous pair of swing doors. This door control has one input for breakout and it requires a normally closed (N/C) circuit. With no continuity between breakout and common the door operation is stopped. If no breakout switches are connected, a jumper wire is required from breakout to common for the door to operate. ![]() A breakout switch can be considered a sensor. It senses when a door panel is in the breakout position. A pair of swing doors that breakout the opposite direction of normal operation has two breakout switches (one per door panel). When the door panels are in the breakout position the N/C contact of the breakout switch is open. The two breakout switches must be connected in series (as illustrated below). When connected in series if B/O switch 1 OR B/O switch 2, OR both, are open the control will stop door operation. ![]() When incorrectly connecting the switches in Parallel, and only one door panel is in the breakout position (only one switch open, B/O switch 1) continuity between the breakout and common input is sustained through the other switch (B/O switch 2). This would allow the door to continue operating even though one panel is in the breakout position. This means switch 1 AND switch 2 would have to be open to stop door operation (NOT GOOD). We do not want an AND-Gate. We want on OR-gate. ![]() In review, multiple sensors or switches must be connected in Parallel for N/O inputs and Series for N/C inputs. When working on a two way traffic door, if the door does not open unless both motion sensors are activated, check to see if they are wired in series. When working on doors with multiple breakout switches, check each panel individually for proper operation. If the door continues to operate when only one panel is in breakout, check to see if the switches are wired in parallel. For further information or clarification regarding this issue, contact Jim Sargent at Optex Technologies Incorporated (800) 877-6656 Ext: 330). CORRECTION:
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| Creating the Delighted Customer By Bill Byrne | |||
We shouldn't confuse customer service with service effectiveness. In other words, our customer style can be terrific, but we may still flunk the effectiveness test if we're not offering the substance needed to meet needs or expectations. Winning and keeping customers requires we provide value that propels the customer's life forward. That's good cause to elevate our thinking from providing mere customer service to the next higher level, customer satisfaction. At this level, the customer relationship focuses on the perspective of the customer, not the provider. Here are the series of thoughts that lead to delighting the customer.
Focus on the customer
Share a piece of pertinent information or just check to be sure all is going as planned. Practice the sales-stutter - one call to sell, then one to satisfy, then another to sell. A non-selling contact is important to the healthy of a delighted customer relationship. The most important customer is the existing customer. We become so charged up opening new accounts we too often forget to serve delightfully those most important to us. It doesn't pay to build a business on the backs of your existing, loyal customers. Make your deals available to all customers - not just new ones.
Attitudes and actions Pretend you're going to lose every customer. Imagine the positive energy put into customer delight when we assume we are at risk of losing every customer after every sale. That assumption will motivate us to delight our customers.
Promises are made to be kept.
Don't advertise - Surprise.
Be Genuine. Plan their satisfaction
Customer delight begins during the sale.
Plan your style.
Anticipate customer needs. Creating customer delight
Creating delight is unconditional.
Customer delight requires a good product or service.
Customer delight requires not only the right intent, but the right words.
Growth Creates Growth.
Delightful satisfaction requires flexibility Adapted from Habits of Wealty, by Bill Byrne (The Berkley Publishing Group, New York). Mr. Byrne is the founder and president of several successful corporations in the food service, personal development and publishing industries. He is also a noted speaker and authority on the topic of futuristic leadership. | |||
| Optex Assists Professional Automatic Door Distributors By Offering a Trade-In Program For Non-Ansi Compliant Sensor Systems A new program offered by Optex Technologies Inc. allows Professional Door Distributors to trade in older, single technology, motion only sensors for the purchase of new i-One Sensors which comply with the new ANSI standard. | |||
![]() Optex Technologies Inc. is now offering qualified Automatic Door Distributors the ability to trade in old, single technology motion only detectors and receive an in house credit for the purchase of ANSI Compliant i-One Sensors. Send Optex any old, motion only sensor in any condition and receive a $30 credit towards the purchase of the i-One Motion and Presence Sensor for Sliding Doors with the ability to provide Jamb to Jamb Presence. The i-Sensor is the industries first single technology motion and presence detector with the ability to provide Jamb to Jamb safety. Limited time offer. For more information, contact the Optex Technologies Sales Department at (800) 877-6656. ![]() | |||
| Introductory ProSwingPremier Promotion | |||
ProSwingPremier Header Mounted Swing Door Safety Sensor Key Features and Benefits of ProSwingPremier for Distributor:
![]() Special Introductory Offer: Purchase (2) ProSwingPremier Sensors at the regular price, and get (2) OA-202CBL sensors free of charge (a $240.00 value). Limitation:
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