User manual GAI-TRONICS 12579-003

[. . . ] 42004-716L2B GAI-TRONICS® CORPORATION A HUBBELL COMPANY Model 12579-003 Monitored Relay Module (MRM) Confidentiality Notice This manual is provided solely as an operational, installation, and maintenance guide and contains sensitive business and technical information that is confidential and proprietary to GAI-Tronics. GAITronics retains all intellectual property and other rights in or to the information contained herein, and such information may only be used in connection with the operation of your GAI-Tronics product or system. This manual may not be disclosed in any form, in whole or in part, directly or indirectly, to any third party. How to Use the Assembly/Model Application The Model 12579-003 Monitored Relay Module (MRM) is a Snaptrack module designed for use in the SmartSeries systems. GAI-Tronics uses the MRM to provide a maximum of eight independently controlled relay-contact outputs. [. . . ] 42004-716L2B Page: 7 of 17 In this mode any number of normally-open dry contact closures may be installed on the line. IDC Line Supervision Multiple Switch NOTE: The 20 k, 5% tolerance resistor is not included with the MRM. The resistor is included in a kit (12509-004), which must be ordered separately. f:\standard ioms - current release\42004 instr. manuals\42004-716l2b. doc 11/11 Model 12579-003 Monitored Relay Module Mode 2: IDC Single Normally-Open (N. O. ) Switch Pub. 42004-716L2B Page: 8 of 17 In this configuration, only one normally-open dry contact closure may be installed per supervised line. In this mode, the loop is monitored for open circuits, wire-to-wire short circuits (across + and -), and ground faults. When the contact closure is not active (open), the loop appears as 20. 1 k load (15 k in series with 5. 1 k). When the contact closure is active (closed), the 15 k resistor is bypassed. Figure 6. IDC Single Normally-Open Switch When the contact closure is active (closed), the 15 k resistor is bypassed. When this occurs, it indicates to the MRM that the contact closure is active. If there is a short across L1 and L2, if either leg is grounded, or if a break occurs on either leg, the MRM indicates that a fault has occurred. These resistors are included in a kit (12509-004), which must be ordered separately. f:\standard ioms - current release\42004 instr. manuals\42004-716l2b. doc 11/11 Model 12579-003 Monitored Relay Module Mode 3: IDC Single Normally-Closed (N. C. ) Switch Pub. 42004-716L2B Page: 9 of 17 In this configuration, only one normally-closed dry contact closure may be installed per supervised line. In this mode, the loop is monitored for open circuits, wire-to-wire short circuits (across + and -), and ground faults. When the contact closure is not active (closed), the 15 k is bypassed and the circuit sees only the 5. 1 k load. Figure 7. IDC Single Normally-Closed Switch This change is sensed by the MRM and indicates to the MRM that the contact closure is active. If there is a short across L1 and L2, if either leg is grounded, or if a break occurs on either leg, the MRM indicates that a fault has occurred. These resistors are included in a kit (12509-004), which must be ordered separately. f:\standard ioms - current release\42004 instr. manuals\42004-716l2b. doc 11/11 Model 12579-003 Monitored Relay Module Mode 4: IAC Line Supervision Pub. 42004-716L2B Page: 10 of 17 In Mode 4, outputs can be used to control several dc-powered signaling devices by connecting/ disconnecting power to these devices. In addition, this loop is monitored for open circuits, wire-to-wire short circuits (across + and -), and ground faults. [. . . ] 900 maximum Mode 5 (Wet) DC input voltage range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20­30 V dc (24 V dc nominal) Loop Supervision Limitations: Cable limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 maximum loop resistance Resistance across loop (excluding end-of-line device) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100 k minimum Terminals: Minimum conductor size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. 28 AWG (0. 5 mm2) Maximum conductor size. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . No. [. . . ]