Summary of Contents for Nexstar AD 4305
- Page 1 AD 4305 RS-485 MULTIPLEXER Installation and Operation 5452 Betsy Ross Drive Santa Clara, CA 95054-1184 (408) 727-5170 FAX (408) 727-6707 P/N 66109923001 Rev. A...
- Page 2 © 1996 Westinghouse Security Electronics. All rights reserved. DigiReader™, QuadraKey™, DuraKey™, NexKey™ and NexStar™ are trademarks of Westinghouse Security Electronics. Printed in the United States of America.
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Page 3: Limited Warranty
LIMITED WARRANTY Westinghouse Security Electronics (WSE) warrants to the original user the equipment manufactured by WSE as described herein to be free from defects in material and workmanship for a period of one year from the date of purchase by such user or fifteen (15) months from the date of shipment from the factory, whichever is sooner (command key / magnetic stripe card warranties differ, see below), provided: WSE has been notified within such period by return of any alleged defective... - Page 4 US Government Printing Office, Washington DC 20402, stock number: 004- 000-00345-4. UL-294 Notice The NexStar RS-485 Multiplexer is UL-294 listed and may be used in a UL-294 listed access control system. All system components must be UL-294 listed and installed according to manufacturers' instructions to comply with UL-requirements.
- Page 5 IMPORTANT WARNING Do not connect the NexStar without having carefully read this guide. If this is the first time you have installed this type of device, have another person check the connections before turning on the power. The warranty is void if you damage any component because of an error in wiring a connection. Follow these basic procedures and precautions to avoid damage to the components (local codes and practices may also apply and must be complied with).
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Page 6: Table Of Contents
Communications Errors ......................9 List of Figures Figure Description Page S-Net Layout using a NexStar .................... 1 NexStar ..........................2 Cover Label ........................3 NexStar Base and Mounting Holes ..................3 NexStar Printed Circuit Assembly ..................4 Transmit LEDs ........................5 Termination Jumper ...................... -
Page 7: Scope
The NexStar provides a link between a WSE access control unit, such as the NexSentry or SE 818SC, and multiple S-Net runs. A single S-Net run may be a maximum of 4000 feet (1200 meters). -
Page 8: Specifications
13 oz 400 g Weig ht PHYSICAL DESCRIPTION The NexStar consists of a single printed circuit assembly (PCA) in a two-part housing. Male Phoenix connectors on the PCA are accessed through the side of the housing for port connections. 4 PLACES... -
Page 9: Cover
TX-4 TX-5 Figure 3: Cover Label BASE The base of the housing has four through holes for mounting the NexStar to a wall or other surface. Four standoffs are affixed to support the PCA. 7.29 in (18.5 cm) 3.2 in 8.1 cm) -
Page 10: Pca
The COM ACTIVE LED will be illuminated when any data is being passed through the NexStar. The five port LEDs will illuminate when the associated port is transmitting. On the left side of Figure 6, the NexStar is receiving data from an ACU on port one. This data is then transmitted... -
Page 11: Fuses
All LEDs except TX-1 are illuminated. On the right side of the figure, the NexStar is receiving data from an S-Net device on port 3. Again, data is transmitted to all other ports; all LED's except TX-3 are illuminated. -
Page 12: Phoenix Connectors
DR 4305 NexStar Installation and Operation Data twisted pair Power and Ground twisted pair Figure 8: Connector Pin-Outs The shield wire is connected to the ACU ground to provide single-point grounding. See the appropriate ACU manual for additional information. NSERTION For wire insertion to Phoenix connectors, the following procedure is recommended: 1. -
Page 13: S-Net Wiring
S-NET WIRING S-Net is a serial network for communication between the ACU and node devices. Typically, the cable used is two twisted-pairs with an overall shield; one pair is for data, the other pair is for DC power. While the maximum length of an S-Net branch is 4,000 feet (1200 meters), it is recommended that separate twisted-pair cables for data and power when lengths exceed 500 feet (150 meters). -
Page 14: Termination
The basic steps to install the NexStar are: 1. Install S-Net wiring. See page 7 for wiring information 2. With cover on to protect the PCA, mount te NexStar base. See Figure 4. 3. Terminate S-Net branches at each end. See the above for information on termination requirements for each S-Net branch. -
Page 15: Troubleshooting
Check termination resistors and jumpers OMMUNICATIONS RRORS 1. Keep port with the ACU connected to the NexStar (see Figure 12). 2. If the ACU branch does not include other S-Net devices, connect a second branch (see Figure 13). 3. Verify correct operation of ACU and S-Net devices. -
Page 16: Branch Isolation
DR 4305 NexStar Installation and Operation Figure 12: Branch Isolation Figure 13: Alternate Branch Isolation...
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