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® Pelco World Headquarters • 3500 Pelco Way, Clovis, California 93612-5699 USA • www.pelco.com USA & Canada: Tel: 800/289-9100 • Fax: 800/289-9150 International: Tel: 1-559/292-1981 • Fax: 1-559/348-1120 ADDENDUM Addendum No.
CM9760-REL System 9760 ® Relay Interface Unit Installation/ Operation Manual C538M-A (3/04) ® Pelco W orld Headquar ters • 3500 P elco W a y , Clovis, CA 93612-5699 USA • www .
2 Pelco Manual C538M-A (3/04) CONTENTS Section Page 1.0 GENERAL ................................................................................................... 3 1.1 IMPOR T ANT SAFEGU ARDS AND W ARNINGS ................................ 3 2.0 DESCRIPTION .
Pelco Manual C538M-A (3/04) 3 Please thoroughly familiarize yourself with the information in this manual prior to installation and operation. 1.0 GENERAL 1.1 IMPORT ANT SAFEGUARDS AND W ARNINGS Prior to installation and use of this product, the following W ARNINGS should be obser v ed.
4 Pelco Manual C538M-A (3/04) 2.0 DESCRIPTION The CM9760-REL Rela y Interface Unit is an optional accessory of the System 9760 ® . The relay interf ace unit provides dry contact switching for direct or automatic con- trol of peripheral equipment. The unit connects to any RS-422 COMM port on the rear of the CM9760-CC1.
Pelco Manual C538M-A (3/04) 5 3.0 PRE-INST ALLA TION INFORMA TION 3.1 FRONT VIEW AND DIP SWITCH ACCESS Figure 1 illustrates a front vie w of the unit with its front panel removed. P ower (green) and Data (red) LEDs occupy opposite ends of the unit’ s front panel.
6 Pelco Manual C538M-A (3/04) 3.2 REAR VIEW The rear of the unit is illustrated in Figure 2. F rom left to r ight are the f ollowing: 1. F our b locks consisting of 16 contact pairs, each with mating plugs f or the at- tachment of peripheral equipment.
Pelco Manual C538M-A (3/04) 7 3.2.1 REL Contact Pair Connections Physically , each rela y bloc k consists of 16 rela y contacts and two mating plugs. Since a relay contact requires tw o terminal positions, each plug provides 8 contacts via 16 screw terminals.
8 Pelco Manual C538M-A (3/04) 3.2.2 External Relay Wiring Considerations Components of external rela y wiring are illustrated in Figure 4. 3.2.3 Communication Connectors Communication to and from the unit is provided through two RJ-45 ports on the rear of the CM9760-REL.
Pelco Manual C538M-A (3/04) 9 3.2.3.2 RJ-45 Data Cables Because both RJ-45 connectors hav e the same wir ing pin-outs , they require the same “flipped” cable .
10 Pelco Manual C538M-A (3/04) 3.2.4 Power Connections The CM9760-REL utilizes an auto-ranging internal transf ormer circuit that allows input power to range from 100-240 V A C , 50/60Hz. Associated with the input po wer is the power ON/OFF s witch and the input power fuse.
Pelco Manual C538M-A (3/04) 11 3.3 SETUP 3.3.1 Preliminary Discussion FRAME ADDRESSES The IRC, VCRC , and the CM9760-REL Rela y Interface Unit, all use software GPIs to activate control of e xter nal de vices. The number of GPIs required by each hardw are device v aries.
12 Pelco Manual C538M-A (3/04) When setting frame addresses on the front panel s witches for a group of daisy- chained REL units, k eep in mind a few working rules: WORKING RULES 1. Star t with frame address 0, which is associated with ph ysical GPI 1, and w ork sequentially forw ard until all relay interf ace units are accounted for .
Pelco Manual C538M-A (3/04) 13 3.3.2 DIP Switch Settings DIP switch settings are illustr ated and discussed in Figure 10. Figure 10. DIP Switch Functions.
14 Pelco Manual C538M-A (3/04) Ta b le A. Fr ame Address, GPI Range Association (Continued on ne xt page) Daisy-Chained Frame Sub-Frame Combined Associated GPI Range Relay Units Addresses Addresses Fr.
Pelco Manual C538M-A (3/04) 15 Ta b le A. Fr ame Address, GPI Range Association (Contin ued) 45 11 0100 0 0 1 1 0 353 354 355 356 357 358 359 360 46 11 0100 1 0 1 1 1 361 362 363 364 365 366 367 368 4.
16 Pelco Manual C538M-A (3/04) Figure 11. Configur ing the GPI Define File f or REL Operation Figure 12. Configur ing the COMMS File f or REL Operation 3.
Pelco Manual C538M-A (3/04) 17 4.0 INST ALLA TION Physical installation of the REL unit is relativ ely simple, although v arious configura- tions are possible . 4.1 DIRECT RACK-MOUNT HOOK-UP The REL unit mounts in a standard 19-inch rack and occupies only one R U (1.
18 Pelco Manual C538M-A (3/04) 4.3 DAISY -CHAINING Daisy-chaining occurs when more than 64 relays are required. More impor tantly , each unit must be configured to hav e a unique address , ref erred to as a F rame Address. F r ame addressing with respect to REL units was discussed in Section 3.
Pelco Manual C538M-A (3/04) 19 5.0 OPERA TION 5.1 OPERA TIONAL OVERVIEW The basic function of the REL unit is to allow the user/operator to control various peripheral equipment via relay contacts . Each REL unit processes and ex ecutes only commands with addresses that match that of the RELs (frame address).
20 Pelco Manual C538M-A (3/04) Figure 15. Ph ysical Representation of Figure 16 REL UNIT 1 REL UNIT 2 REL UNIT 3 REL UNIT 4 REL UNIT 5 PERIPHERAL DEVICES PERIPHERAL DEVICES PERIPHERAL DEVICES PERIPHER.
Pelco Manual C538M-A (3/04) 21 Method II – The CM9760-GPI/AUX Calculator If we re visit the EXAMPLE just discussed and illustrated in Figures 15, we can immediately find the inf ormation needed by direct read-off from the information bo x es on the front of the calculator .
22 Pelco Manual C538M-A (3/04) Figure 16. Controlling REL Output Contacts From the CM9760-KBD Once the system is running and a keyboard is on-line , direct control of an REL is as f ollo ws (refer to Figure 16): 1.
Pelco Manual C538M-A (3/04) 23 6.0 SPECIFICA TIONS ELECTRICAL REL UNIT RELAY CONTACTS** Parameters: Maximum Switching Capacity 60 Watts Maximum Operating Voltage 125V AC/DC Maximum Current 2 Amps Contact Resistance 75 m ohms Rated Load Parameters: .
24 Pelco Manual C538M-A (3/04) 7.0 W ARRANTY AND RETURN INFORMA TION WARRANTY Pelco will repair or replace, without charge, any merchandise proved de- fective in material or workmanship for a period of one year after the date of shipment.
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