® System 9750 Relay Interface CM9750-REL Series Relay Interface Installation/ Operation Manual C534M (2/98) Pelco • 3500 Pelco Way • Clovis, CA 93612-5699 USA • www.pelco.
CONTENTS Section Page 1.0 GENERAL .................................................................................................. 3 1.1 IMPORTANT SAFEGUARDS AND WARNINGS ............................... 3 2.0 DESCRIPTION .......................................................................................... 4 2.1 MODELS ............................................................................................ 4 2.2 CIRCUIT DESCRIPTION ................................................................
1.0 GENERAL 1.1 IMPORTANT SAFEGUARDS AND WARNINGS Prior to installation and use of this product, the following WARNINGS should be observed. 1. Installation and servicing should only be done by Qualified Service Personnel and conform to all Local codes. 2. Only use replacement parts recommended by Pelco. 3. After replacement/repair of this unit’s electrical components, conduct a resistance measurement between line and exposed parts to verify the exposed parts have not been connected to line circuitry.
2.0 DESCRIPTION The Relay Interface units of the CM9750-REL Series provide up to 32 relay contacts for operating external equipment such as VCRs and lights. (The unit is shipped from the factory equipped with 16 outputs.) Each of the relays can be configured for normally open or normally closed operation by the placement of internal jumpers. The unit is shipped with the contacts in the normally open position. Each Relay Interface unit provides outputs for four GPIs (each GPI controls 8 relays).
2.2 CIRCUIT DESCRIPTION The Relay Interface consists of two relay cards (with additional room for two more), one motherboard, and one power supply board. The unit receives TTL level signals from the GPI SPINC card (located in the CM9750/CM9760 Controller) through the 50-pin connector on the rear panel of the unit. This TTL signal is then inverted and applied to the corresponding relay to close the contact. The position of the strap determines the condition of the output. Refer to Figure 2.
3.0 INSTALLATION 3.1 MOUNTING INSTRUCTIONS NOTE: The Relay Interface unit can be configured to provide either normally open or normally closed relay outputs. The unit is shipped with all outputs in the normally open mode of operation. If you need to configure outputs for normally closed operation, refer to Sections 3.5 and 3.6 prior to mounting the unit. The Relay Interface mounts in a 19-inch (48.26 cm) rack using standard mounting hardware. The unit occupies 1 rack unit (1.75 in. or 4.
3.4 WIRING THE RELAY OUTPUTS Refer to Figure 3. Select the desired relay output and insert the wires to be used into the square holes in the terminal. Tighten the screws until the wires are properly secured. 3.5 INSTALLING AND REMOVING THE RELAY CARDS To install or remove any of the relay cards, remove the top cover to the unit. Refer to Figure 4 for the identification of each board.
Table B.
4.0 OPERATION There are no specific operating instructions for the unit. The unit begins operation once power is applied. All operating commands are issued from the appropriate CM9750/CM9760 Keyboard(s) as defined in the Setup File. For additional information on the operation of the Relay Interface unit (GPI relays), refer to the Operation Manual or to the System Administrator Manual.
5.0 MAINTENANCE 5.1 REPLACING THE FUSE WARNING: Always replace a blown fuse with a fuse of the same rating. Failure to do so could result in serious damage to the unit. 10 The unit is equipped with a 2A fuse on the input. The fuse holder is located on the rear panel of the unit. To replace the fuse, first remove power to the unit by disconnecting the power at the wall socket. Rotate the fuse holder counterclockwise until the fuse holder comes out of its receptacle. Replace the fuse.
NOTES Pelco Manual C534M (2/98) 11
6.0 WARRANTY AND RETURN INFORMATION WARRANTY Pelco will repair or replace, without charge, any merchandise proved defective in material or workmanship for a period of one year after the date of shipment. Exceptions to this warranty are as noted below: • Five years on FT/FR8000 Series fiber optic products. • Three years on Genex® Series products (multiplexers, server, and keyboard).
