Nortech CRC200R User Manual
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Contents
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CRC200R USER GUIDE ISSUE 023-3Warning: Power supply limitations for use of Door Open Timezones featureIt is recommended that the supply voltage is limited to between 12 and 18 volts DC ifthe Door Open Timezone feature is to be used (i.e. door relays remaining operatedfor several hours). The continuous operation of relays with certain readers connectedmay cause unreliable operation of the CRC200R if fed from a 24 volt supply.Warning: Use of CRC200R with 12V readersIf a 12V DC reader is to be powered from the CRC200R, then the power supply tothe CRC200R must be rated at 12V DC. When the “supply voltage” reader supplyoutput is selected, the input +ve pin is connected directly to the reader supply outputpin. If therefore, an incorrectly rated supply is connected to the input, it is likely todamage the reader when power is applied.3.3 Reader voltage settingsEach of the two reader interfaces includes a power supply output. These power supplies can beindividually set to either 5V or “supply voltage” to match the requirements of the correspondingreader. The voltage for each reader is set on a jumper to the left of the corresponding terminalblock. The factory setting for these jumpers is 5 volts. To avoid damage to the readers, you mustset the correct voltage for each reader before applying power to the CRC200R.If you are in any doubt about the output voltage to the reader, apply power to the CRC200Rwithout connecting the readers and measure the voltage at the reader connector(s).3.4 Connecting the readerThe wiring will depend upon the type of reader and whether the reader is fed directly from aseparate power supply. The screen of the cable should be connected to a suitable earth at one endonly (to avoid earthing loops). Connection to earth at the controller end is recommended.3.5 Output Relay ConnectionsEach of the reader inputs is associated with a set of voltage free relay output pins (relay common,normally closed and normally open). Connect these according to the specific requirement. Therelay common and normally open terminals should be used for barriers, turnstiles, etc. as well asfail-secure door strikes.For fail-safe door strikes, magnetic locks, etc., that require to be energised in the locked state (de-energise to unlock) the relay common and normally closed contact should be used.The relay common terminal should be connected to the +V terminal of the lock power supply andthe N/O or N/C terminals connected to the positive terminal of the locking device. The 0V of thelock power supply should be connected to the 0V terminal of the locking device.Warning: Do not exceed the relay contact current rating of 2A @ 30V DC, andensure that inductive loads are fitted with a back EMF protection device. Failure todo this will invalidate the warranty.3.6 Free Exit OptionOn the CRC200R there is a ‘Free Exit’ option for each of the two output relays. This operates suchthat the momentary application of a ground to the ‘free exit’ pin (marked REX on the diagram) hasthe same effect as the detection of a valid card at the corresponding reader (i.e. the correspondinglatch relay energises for the preset relay time). |
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