CRC200R USER GUIDE ISSUE 02
3-3
Warning: Power supply limitations for use of Door Open Timezones feature
It is recommended that the supply voltage is limited to between 12 and 18 volts DC if
the Door Open Timezone feature is to be used (i.e. door relays remaining operated
for several hours). The continuous operation of relays with certain readers connected
may cause unreliable operation of the CRC200R if fed from a 24 volt supply.
Warning: Use of CRC200R with 12V readers
If a 12V DC reader is to be powered from the CRC200R, then the power supply to
the CRC200R must be rated at 12V DC. When the “supply voltage” reader supply
output is selected, the input +ve pin is connected directly to the reader supply output
pin. If therefore, an incorrectly rated supply is connected to the input, it is likely to
damage the reader when power is applied.
3.3 Reader voltage settings
Each of the two reader interfaces includes a power supply output. These power supplies can be
individually set to either 5V or “supply voltage” to match the requirements of the corresponding
reader. The voltage for each reader is set on a jumper to the left of the corresponding terminal
block. The factory setting for these jumpers is 5 volts. To avoid damage to the readers, you must
set 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 CRC200R
without connecting the readers and measure the voltage at the reader connector(s).
3.4 Connecting the reader
The wiring will depend upon the type of reader and whether the reader is fed directly from a
separate power supply. The screen of the cable should be connected to a suitable earth at one end
only (to avoid earthing loops). Connection to earth at the controller end is recommended.
3.5 Output Relay Connections
Each 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. The
relay common and normally open terminals should be used for barriers, turnstiles, etc. as well as
fail-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 and
the N/O or N/C terminals connected to the positive terminal of the locking device. The 0V of the
lock 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, and
ensure that inductive loads are fitted with a back EMF protection device. Failure to
do this will invalidate the warranty.
3.6 Free Exit Option
On the CRC200R there is a ‘Free Exit’ option for each of the two output relays. This operates such
that the momentary application of a ground to the ‘free exit’ pin (marked REX on the diagram) has
the same effect as the detection of a valid card at the corresponding reader (i.e. the corresponding
latch relay energises for the preset relay time).