UNC500 Hardware Manual V1.3
RBH Access Technologies Inc.
Page
6
of
32
Outputs
There are four form C relays and four open collector outputs that can be programmed as general purpose
or default applications. Although the contacts are rated at 12 amperes at 125vac the surge protectors
prevent voltages greater than 40vac or 56vdc from being applied. The recommended use of the relays is
to provide isolated outputs for driving electric strikes or magnetic locks at a maximum voltage of 24v.
The open collector outputs are current limited to 100 milli-amperes direct current only.
Auxiliary Power
A thermal fuse protected power output rated at 500 milli-amps 12 - 14Vdc.
Inputs
There are eight inputs used for sensor connections. Four are configured as general purpose and four are
either programmed for default application or for general purpose. The software provides configuration
information used to decode the state of the contacts. The following table illustrates the seven circuit type
assignments. Note that when an input is armed it will only report alarm or restore states. All “normal”
states are translated to “restore” and all other states are translated to “alarm”.
Reader Interface
Two standard wiegand interfaces provide the following connections for typical proximity readers:
1)
Thermal fuse protected power (500ma @12 - 14VDC).
2)
Wiegand data interface.
3)
Reader tamper input (s). Initially if open it will be ignored but once a short is connected it will
report a reader tamper alarm whenever the input is opened.
4)
LED and beeper outputs are open collector current limited to 100ma.
OSDP readers are also supported.
Fuse Monitoring
Besides monitoring the battery voltage the UNC500 also monitors the input voltage (DC), auxiliary
voltage (aux) and the reader voltage (reader) and reports to the host whenever the state changes.
Diagnostic LED’s
Each RS485 circuit has a red and green LED to indicate when a signal is received or transmitted.
Diagnostic 1 is a bicolour LED when red indicates receiving data from the host and when green indicates
transmission of data.
Diagnostic 2 will flash slowly when connected to the host and quickly when not connected.
Diagnostic 3 will flash when a power problem such as a low battery or low auxiliary power is detected.
Tamper Detection
A tamper wire may be connected to JP1 located close to the power resistors on the board. A short to this
input is normal and an open is alarm.
