Ohio Medical Area Installation And Maintenance Manual
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Contents
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Ohio Medical Corporation., 1111 Lakeside Drive, Gurnee, IL 60031-4099 (800/448-0770) www.ohiomedical.comMedical Gas Alarm Manual ■ 255098 (Rev.8) 07/08Page 184.5 Dry Contact Master Alarm Output ConnectionsCAUTION: When testing the output relays, make all connections with the power off.Shorting the terminals together while the relay is energized can cause permanentdamage to the relay.Dry Contact Master Alarm Panel is similar to the Master Alarm Panels except that they alsoprovide 10 alarm outputs that connect to building management systems. These additionalconnections are connected directly to the Dry Contact Master Alarm Panel circuit board atposition “J1” through “J10” as shown in Figure 8B. Each of these pairs of contacts are clearlymarked on the circuit board and includes both positive (+) and negative (-) terminals. The drycontacts going to the other alarm devices or a building management system must be rated forat least 12 VDC .Figure 8A:Wiring from Source Equipment to amaster alarm position(On either master alarm modules)Figure 8B:Wiring from a master alarm Position to aBuilding management System(On Dry Contact Master Modules Only)Wiring from the source equipment to the second pair ofcontacts on the bottom row (MA2) on the master.Second pair ofcontacts onthe top row(J2) is wired toa buildingmanagementsystemCorrespondingswitch to the secondpair of contacts, S2,on the mastershowing “NormallyClosed Circuit Loop”Maintenance Switch, S11, inthe “ON” positionInput Connection fromAnnunciator or previous alarmmodule.Output Connection to the nextmaster alarm module. |
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