Azure VL-DVDPL User manual

Azure Access BLU-IC2
Hardware Manual
Revision A
March 30, 2021
© 2021 Azure Access Technology, Inc.
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BLU-IC2 Hardware Manual
2-Door Intelligent Network Controller
by Azure Access Technology

2021 Azure Access Technology, Inc
This manual contains confidential information and may only be reproduced or distributed with the written consent of Azure Access Technology.
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IMPORTANT INFORMATION
W A R N I N G
HIGH VOLTAGE, AC MAIN POWER SHOULD ONLY BE CONNECTED BY QUALIFIED, LICENSED
ELECTRICIANS. ALL APPLICABLE LAWS AND CODES MUST BE FOLLOWED. IF THIS
PRECAUTION IS NOT OBSERVED, PERSONAL INJURY OR DEATH COULD OCCUR
Power should not be applied to the system until after the installation has been completed. If this
precaution is not observed, personal injury or death could occur, and the equipment could be
damaged beyond repair.
-Verify that the external circuit breaker which supplies power to the device power supply is turned off
prior to installation.
-Verify that the output voltage of the power supply is within specifications prior to connection to the
device.
C A U T I O N
Several important procedures should be followed to prevent electro-static discharge (ESD) damage
to sensitive CMOS integrated circuits and modules.
-All transport of electronic components, including completed reader assemblies, should be in static
shield packaging and containers.
-Handle all ESD sensitive components at an approved static controlled work station. These work
stations consist of a desk mat, floor mat and an ESD wrist strap. Work stations are available from
various vendors including the 3M company.
FCC Compliant
This device complies with Part 15 of FCC Rules. Operation is subject to the following two conditions:
1.This device may not cause harmful interference, and
2.This device must accept any interference received, including interference that may cause undesired
operation.
This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instruction manual, may cause harmful interference to radio communications.
Operation of this device in a residential area is likely to cause harmful interference in which case the
user will be required to correct the interference at his/her own expense. The user is advised that any
equipment changes or modifications not expressly approved by the party responsible for compliance
would void the compliance to FCC regulations and therefore, the user's authority to operate the
equipment.
CE Compliant
UL & ULC Recognized
•UL294
•UL294B
•UL1076 & ULC/ORD 1076
•UL2610

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Table of Contents
PART I
1 INTRODUCTION...............................................................................................1
1.1 General Features.......................................................................................................................................... 1
1.2 Configuration................................................................................................................................................ 1
2 HARDWARE LAYOUT .....................................................................................3
2.1 Terminal Connectors ................................................................................................................................... 4
2.2 Jumpers ........................................................................................................................................................ 7
2.3 SOM (System on Module)............................................................................................................................ 7
2.4 Micro USB OTG Port.................................................................................................................................... 8
2.5 MicroSD Card ............................................................................................................................................... 8
2.6 LEDs.............................................................................................................................................................. 8
2.7 Function Buttons.......................................................................................................................................... 9
2.8 Dip Switches................................................................................................................................................. 9
2.9 Memory Retention During Power Failure .................................................................................................. 9
2.10 Mounting..................................................................................................................................................... 10
3 SYSTEM WIRING & SETUP...........................................................................11
3.1 Power........................................................................................................................................................... 11
3.1.1 Primary Board Power (TB1)..................................................................................................................... 11
3.1.2 Powering Peripherals............................................................................................................................... 11
3.2 Grounding................................................................................................................................................... 12
3.3 Communications........................................................................................................................................ 12
3.3.1 Network (P2) ............................................................................................................................................ 12
3.3.2 Downstream RS-485 Serial Ports (TB3 & TB4)....................................................................................... 12
3.4 Unsupervised Cabinet Tamper & Power Fault (TB1).............................................................................. 14
3.5 Reader Ports (TB11 & TB12)..................................................................................................................... 15
3.5.1 TTL Readers ............................................................................................................................................ 15
3.5.2 RS-485 (OSDP) Readers......................................................................................................................... 16
3.6 Supervised Alarm Inputs (TB3 –TB8)...................................................................................................... 16
3.6.1 End of Line (EOL) Termination Resistors ................................................................................................ 17
3.7 Output Relays (TB9 & TB10)...................................................................................................................... 18
3.7.1 Strike Wiring............................................................................................................................................. 18
3.7.2 Auxiliary Output Relay.............................................................................................................................. 18
3.7.3 Voltage Spike Suppression...................................................................................................................... 18
3.8 Door / Access Point Setup ........................................................................................................................ 18
3.8.1 Reader...................................................................................................................................................... 19
3.8.2 Door Contact & Exit Pushbutton/REX Inputs........................................................................................... 19
3.8.3 Door Strike ............................................................................................................................................... 19
4 CONTROLLER CONFIGURATION ................................................................20
4.1 Host Communications............................................................................................................................... 20
4.2 Web Configuration Interface..................................................................................................................... 20
4.2.1 Date & Time ............................................................................................................................................. 23
4.2.2 Network.................................................................................................................................................... 23
4.2.3 Mail........................................................................................................................................................... 25
4.2.4 Services.................................................................................................................................................... 26
4.2.5 Maintenance............................................................................................................................................. 27
4.2.6 Firmware .................................................................................................................................................. 27
4.2.7 Profile....................................................................................................................................................... 30
4.3 Device Cluster ............................................................................................................................................ 30
5 TROUBLESHOOTING....................................................................................32
6 SPECIFICATIONS ..........................................................................................33
7 UL COMPLIANCE AS RECOGNIZED PRODUCT.........................................35
8 REVISION HISTORY ......................................................................................36

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Table of Figures
Figure 2.1: BLU-IC2 Diagram............................................................................................................... 3
Figure 2.2: BLU-IC2 Jumpers.............................................................................................................. 7
Figure 2.3: BLU-IC2 Mounting Holes [inches (mm)] ........................................................................ 10
Figure 3.1: Device Wiring .................................................................................................................. 13
Figure 3.2: RS-485 Bus Topologies .................................................................................................. 13
Figure 3.3: Cabinet Tamper & Power Fault Wiring........................................................................... 14
Figure 3.4: BLU-IC2 TTL Reader Wiring ........................................................................................... 15
Figure 3.5: OSDP Wiring.................................................................................................................... 16
Figure 3.6: Input Supervision............................................................................................................ 17
Figure 3.7: Strike Wiring Diagram (DC w/ Diode)............................................................................. 18
Figure 3.8: Access Point Wiring........................................................................................................ 19
Figure 4.1: BLU-IC2 HOSTNAME....................................................................................................... 20
Figure 4.2: Typical BLU-IC2 Device Cluster..................................................................................... 31

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Part I
Introduction
1 Introduction
The BLU-IC2 high-speed network controller provides complete connectivity for two access points with 2 reader
ports, 8 supervised inputs, 4 relay outputs. The BLU-IC2 is configured and monitored with Host software over
the network. IO & Reader Interface panels can connect to the BLU-IC2 over the network or RS485 serial ports.
The BLU-IC2 provides interface connections for a variety of card reader technologies, including proximity,
smart card, biometric, bar code, and infrared readers. Card readers with standard Wiegand or Clock/Data
output can be connected to the BLU-IC2 as well as card readers that use OSDP protocol. A downloadable
card database and event buffering allows the BLU-IC to work independently of monitoring software after initial
programming.
Typical use of the system is the control of site access by control of door locking devices associated with card
readers and PIN keypads and maintaining logs of this access for later reporting. Many levels of further
integration with building alarm and monitoring systems, time and attendance systems, and video surveillance
systems are also possible.
1.1 General Features
• Two onboard reader ports for up to 2 TTL readers or up to 16 RS485 (OSDP) readers (with expanded
license)
• Full, Stand-Alone Operation with local database of up to 1,000,000 cards & 100,000events
• One 10/100 Ethernet connection
o Second Ethernet connection possible with USB-to-Ethernet adapter
• Up to 254 Card Formats: 127 Wiegand and 127 Magnetic
• 255 Access Levels Per Card
• Activation/Deactivation Time
• 8 Supervised Alarm Inputs
o Configurable termination resistor values for supervised inputs
• 4 Relay Outputs
• Inputs & Outputs fullyre-assignable
• Two, 2-wire RS-485 ports for downstream communication
o Supports proprietary or OSDP protocol
• 1 Unsupervised Cabinet Tamper Input
• 1 Unsupervised Power FaultInput
• 1 LED Output per reader port (tri-state control)
• 1 Buzzer Output (open collector) per reader port
o Buzzer output can be repurposed for 2-wire LEDcontrol
• User accessible logic and event scripting
• Clustering
• 3rd party embedded applications
1.2 Configuration
To load a configuration and database, the BLU-IC2 must connect to a Host software application. The Host
software contains functions for setting the configuration of the device. Configuration settings and cardholders
are stored in a central database and then transmitted via a proprietary encrypted protocol to the Cluster Master
which in turn will send the configuration to Cluster Member. Once programmed, the Cluster will operate
independently, sharing configuration information as well as event information through direct network
communication. There are also several functions that reside within the cluster that will continue to operate
independently.

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In addition to cardholders, the following information is stored in the Cluster:
• Card Reader Data Output Format: Wiegand or Magnetic
• Strike Time—The duration during which the strike relay will be energized in the case of an access grant.
• Held Open Time—After an access grant and a subsequent opening of the door contact, the time in which
the door contact must be closed before an alarm state is reported
• Initial Reader Mode—The access mode in which the reader will function upon powering up or when
communication has been interrupted with the Host software. The following modes aresupported:
o Card Only—An access request is made by presenting a card to the reader. The data is verified against
the BLU-IC2 database to ensure that the card has a valid Facility Code and Card Number.
o Card or PIN—Access requests are made either by presenting a card or by keying in a PIN (Personal
Identification Number) on a keypad. A card entry is process in Card Only mode.
o Card & PIN—A card must be read to start the access request. If the card is valid, the user is prompted to
enter the corresponding PIN. The request is granted only if the card and PIN match what is in the data
base.
o Locked—No access granted. Reader ignores all cards and PINentries.
o Unlocked—Door strike is continuously energized and the door contact input is not monitored. Access is
not controlled.
o Facility Code—The entire card’s contents are read by the BLU-IC2, but only the Facility Code is checked,
and if it matches a Facility Code downloaded from the Host software, access isgranted.
• Event Scripts - Programs that remain resident on the BLU-IC2 constantly monitoring for special conditions
to be met and then executing a pre-determined set of commands.
• Logic Scripts - Programs that change the base functionality of a function on the BLU-IC2, generally to modify
the access cycle or to perform unique non-access related functions.
• Plugin Scripts - Programs that remain resident on the BLU-IC2 but can have their function modified by
sending a dynamic configuration to information storage areas on the BLU-IC2. This allows the BLU-IC2 or
another external system to easily affect the function of script behavior without having to modify and reload
the entire script.

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Part II
Hardware Layout
2 Hardware Layout
Figure 2.1: BLU-IC2 Diagram

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2.1 Terminal Connectors
The BLU-IC2 uses terminal blocks for connecting power, readers & door control signals, supervised alarm inputs,
and relay output connections. The connection terminals are factory equipped with removable screw-down quick
connectors which are easily removed from the board by firmly grasping the connector and pulling away from the
board. If pliers are used to remove the connectors, they should be of the rubber-tipped type. Take care to not
damage onboard components when using any tools near the board. The proper location of the quick connectors
is outlined in white on the board.
BLU-IC2 Terminal Connections
Reader Connections
Location
Type
Label
Function
TB12-1
Ground (Reader
Power)
GND
Reader 1 Device Connections
TB12-2
TTL: Data/Data 0
RS485: TR-/B
DAT/
D0
TB12-3
TTL: Clock/Data 1
RS485: TR+/A
CLK/
D1
TB12-4
Beeper
(Buzzer) Control
BZR
TB12-5
Green LED
Control
LED
TB12-6
VDC
(Reader Power)
RVO
TB11-1
Ground
(Reader Power)
GND
Reader 2 Device Connections
TB11-2
TTL: Data/Data 0
RS485: TR-/B
DAT/
D0
TB11-3
TTL: Clock/Data 1
RS485: TR+/A
CLK/
D1
TB11-4
Beeper
(Buzzer) Control
BZR
TB11-5
Green LED
Control
LED
TB11-6
VDC
(Reader Power)
RVO
Input Connections
TB5-4
Input 1
IN1
Input 1
TB5-3
Input 1 Return
IN1G

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TB5-2
Input 2
IN2 IN2G
Input 2
TB5-1
Input 2 Return
TB6-4
Input 3
IN3 IN3G
Input 3
TB6-3
Input 3 Return
TB6-2
Input 4
IN4 IN4G
Input 4
TB6-1
Input 4 Return
TB7-4
Input 5
IN5
IN5G
Input 5
TB7-3
Input 5 Return
TB7-2
Input 6
IN6
IN6G
Input 6
TB7-1
Input 6 Return
TB8-4
Input 7
IN7
IN7G
Input 7
TB8-3
Input 7 Return
TB8-2
Input 8
IN8
Input 8
TB8-1
Input 8 Return
IN8G
Serial Connections
TB3-3
Transmit/Receive
Data (+)
TR+
Serial 2-wire RS-485 Port 1
TB3-2
Transmit/Receive
Data (-)
TR-
TB3-1
Ground
GND
TB4-3
Transmit/Receive
Data (+)
TR+
Serial 2-wire RS-485 Port 2
TB4-2
Transmit/Receive
Data (-)
TR-
TB4-1
Ground
GND
Relay Output Connections
TB10-1
Normally
Open
OUT 1 - NO
Relay K1 Connection
TB10-2
Common
OUT 1 - C
TB10-3
Normally
Closed
OUT 1 - NC

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TB10-4
Normally
Open
OUT 2 - NO
Relay K2 Connection
TB10-5
Common
OUT 2 - C
TB10-6
Normally
Closed
OUT 2 - NC
TB9-1
Normally
Open
OUT 3 - NO
Relay K3 Connection
TB9-2
Common
OUT 3 - C
TB9-3
Normally
Closed
OUT 3 - NC
TB9-4
Normally
Open
OUT 4 - NO
Relay K4 Connection
TB9-5
Common
OUT 4 - C
TB9-6
Normally
Closed
OUT 4 - NC
Power, Tamper, AC Fault Connections
TB1-6
Power Input
VIN
Power Input Connection 12
- 24 Vdc
TB1-5
Ground
GND
TB1-4
Tamper Input
TMP
Cabinet Tamper Input
TB1-3
Tamper Input
Return
GND
TB1-2
Power Fault
PFLT
AC Power Fault
TB1-1
Power Fault
Return
GND
TB2-3
Voltage
Output
VOUT
Vin or 12 Vdc if PoE is used
TB2-2
No
Connection
TB2-1
Ground
GND
Table 2.1: BLU-IC2 Terminal Connections
Interfaces on the BLU-IC2 is programmed by Host software. Refer to Host software documentation to
ensure expected configuration.

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2.2 Jumpers
Figure 2.2: BLU-IC2 Jumpers
JUMPER
SETTING
DESCRIPTION
J1
Labeled
PoE VIN
PoE VIN
12-24V DC/DC Power supply. DEFAULT
PoE VIN
PoE (Power over Ethernet) power source
J2
ON/OFF
RS485 termination - Serial Port 1 (COM1)
J3
ON/OFF
RS485 termination - Serial Port 2 (COM2)
J4
ON/OFF
RS485 termination - Reader Port 2 (RDR2)
J5
Labeled
VIN 12V
VIN 12V
12V regulated power for Reader Ports (RVO);
Only use this setting when VIN >= 20VDC
VIN 12V
VIN passthrough power for Reader Ports (RVO);
Use VIN passthrough if using PoE power source
J6
ON/OFF
RS485 termination - Reader Port 1 (RDR1)
Note: RS485 termination jumpers (J2, J3, J4, & J6) are shipped from the factory in the OFF (termination
disengaged) position. Only turn ON termination if the ASP-2 is at the end of the serial bus.
2.3 SOM (System on Module)
SOM Port: U1
The SOM (System On Module) comes from the factory and should not be removed. In case replacement is
necessary, align the notch at the bottom of the SOM with the connector, slide the module in at a 45-degree
angle until the contact pins are fully covered by the connector, then gently press the SOM towards the board
until it clicks into place. Make sure the SOM is properly installed before powering on the board.

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2.4 Micro USB OTG Port
The USB connection port (P1) is reserved for future use and should not be connected to any device.
2.5 MicroSD Card
The micro-SD card socket (P3) is reserved for future use and should not be used.
2.6 LEDs
The BLU-IC2 has 24 LEDs for use in monitoring panel functions and diagnosing issues.
HB
Heartbeat & Offline / Online status
Offline: 200ms ON, 800ms OFF
Online: 800ms ON, 200ms OFF
HOST
Host COM Status –ON when online with Host software
BUS
Internal Bus Activity –Flashes repeatedly while data is being exchanged
COM1
RS-485 Serial Port 1 –Flashes when data is transmitted
COM2
RS-485 Serial Port 2 –Flashes when data is transmitted
TMP
Cabinet Tamper –ON when in ALARM, OFF when SECURE
PFLT
Power Fault –ON when in ALARM, OFF when SECURE
RDR1
Reader Port 1 –OSDP Reader: Always ON
Wiegand Reader: Flashes ON when receiving data
RDR2
Reader Port 2 –OSDP Reader: Always ON
Wiegand Reader: Flashes ON when receiving data
Alarm Zone Inputs LEDs
1
Input IN1 Status: OFF = Secure, ON = Alarm, Flash = Fault. See Note 1
2
Input IN2 Status: OFF = Secure, ON = Alarm, Flash = Fault. See Note 1
3
Input IN3 Status: OFF = Secure, ON = Alarm, Flash = Fault. See Note 1
4
Input IN4 Status: OFF = Secure, ON = Alarm, Flash = Fault. See Note 1
5
Input IN5 Status: OFF = Secure, ON = Alarm, Flash = Fault. See Note 1
6
Input IN6 Status: OFF = Secure, ON = Alarm, Flash = Fault. See Note 1
7
Input IN7 Status: OFF = Secure, ON = Alarm, Flash = Fault. See Note 1
8
Input IN8 Status: OFF = Secure, ON = Alarm, Flash = Fault. See Note 1
Output Relays
K1
Relay OUT 1 (K1): ON = Energized
K2
Relay OUT 2 (K2): ON = Energized
K3
Relay OUT 3 (K3): ON = Energized
K4
Relay OUT 4 (K4): ON = Energized

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Ethernet –P2
Speed (left side)
Green: OFF = 10Mbps, ON = 100Mbps
Link (right side)
Yellow: flashing –network activity
PoE Power
PoE_PWR
ON = PoE power available (Power over Ethernet)
Note 1: Every 4 seconds the LED is pulsed to its opposite state for 0.1 seconds
2.7 Function Buttons
The BLU-IC2 is equipped with three function buttons which allow for control of various functions.
RESET
This button will perform a hardware reboot. It functions similar to disconnecting and re-connecting power. To
perform a reboot, press the button and immediately release. The status LEDs will light up and the device will
reboot.
SSH
This button will enable connection to the device by SSH. This mode is only used for advanced troubleshooting.
After pressing the button, SSH will be active for 30 seconds. If there is no connection within 30 seconds, SSH
will be disabled.
Factory Default
This button serves two functions:
Full Factory Reset - This function will completely reset the device to factory default configuration,
erasing all configuration, script and cardholder databases as well as any firmware updates that were
previously applied. To perform a factory reset:
1. Power down the BLU-IC2 by removing the power input connector or turning off the power supply to the
device.
2. Press and hold the FACTORY DEFAULT button.
3. Reconnect power to theBLU-IC2.
4. After 1 second, release the FACTORY DEFAULT button.
5. After 1 minute, the device will be ready to beprogrammed.
Network Reset - This function will reset both network interfaces to their default configuration. All other
configurations and saved information will be kept. This function can be used when the network configuration
is unknown or it is not possible to communicate with the device using the current configuration. To perform a
network reset:
1. Make sure that the device is powered on and functioningnormally.
2. Press and hold the FACTORY DEFAULT button for approximately 3 seconds until LED3 is lit.
3. Release the FACTORY DEFAULT button.
4. After a few seconds, the network will be reset to its default configuration (see the Communication
Connection section for the default parameters).
2.8 Dip Switches
The BLU-IC2 has 4 DIP switches that are reserved for future use.
2.9 Memory Retention During Power Failure
The BLU-IC2 configuration and cardholder memory is stored in non-volatile memory which does not require
constant power to retain information. In the case of sudden power failure, the BLU-IC2 has onboard backup
power to retain volatile memory and the real time clock.

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2.10 Mounting
Eight holes are provided for mounting the BLU-IC2. Mount at least 0.25 inches above the conductive surfaces.
One mounting hole is plated for connecting to Chassis (Earth) ground.
Figure 2.3: BLU-IC2 Mounting Holes [inches (mm)]

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Part III
System Wiring & Setup
3 System Wiring & Setup
This section will provide installation and wiring instructions as well as hardware interface information as it
applies to the access control system. To guard personal safety and avoid damaging equipment it is important
to have a full understanding of electrical wiring best-practices and safety. The following sections provide
general guidelines relating to the BLU-IC2, but are not a substitute for formal training in safely handling
electrical systems!
3.1 Power
3.1.1 Primary Board Power (TB1)
Power is supplied to the BLU-IC2 by the voltage connection in terminal block 1 (see Part 2.1 for exact locations
of terminals). When operating on 12VDC, the BLU-IC2 has a peak current consumption of 700mA when
charging a depleted super capacitor and a normal operating max of 320mA. Due to large inrush currents, it is
recommended to use a power supply with a soft-start feature or be rated to handle x2 the peak current of the
controller. See Section 6 “Specifications” for more details on power consumption.
Take care when selecting a power supply for use with the ASP-2. Most power supplies on the market today
provide good input/output isolation, however those which do not provide isolation (or have high leakage
capacitance), coupled with accidental AC power line interchange, presents serious ground fault problems for
installers. With ground fault, the signal reference between subsystems may be 115 Vac (230 Vac) apart. If
these subsystems are interconnected, the large potential difference will cause equipment damage orpersonal
injury. Apollo Security recommends the use of isolated continuous power from supplies only. All Apollo
Security supplied power supply assemblies are transformer isolated for safety and to minimize ground loop
problems.
In the case of over-current, solid-state fuses integrated on the BLU-IC2 panel will ‘trip’ to protect the
components of the panel. In many cases, the solid-state fuses will reset automatically when normal current
resumes, however it may be necessary to interrupt the supply of power to allow the fuses to reset.
3.1.2 Powering Peripherals
The BLU-IC2 has multiple output ports for distributing power to peripheral devices. Each port has its own
voltage and current specs and have over-current protection.
The installer must adhere to overall current maximums of the power supply, whether PoE or DC/DC from the
wall. Detailed electrical specs are located in the “Specifications” section of this document (section 6).
To maximize longevity, it is not recommended to fully load all peripheral power ports when operating at the
top of the operating temperature range.
Auxiliary Output Power “VOUT” (TB2)
The VOUT port can be used to power peripheral devices such as strikes, IO modules, readers, etc. This port
is a direct passthrough from the primary power VIN (same voltage as VIN), whether using PoE or wall supply.
This port has a 1 Amp current maximum.
Reader Port Power “RVO” (TB11 – pin 6) & (TB12 –pin 6)
Readers can be powered directly from the two reader ports. The RVO voltage is jumper selectable to be either
passthrough from VIN or a regulated 12VDC. The regulated 12VDC setting is only to be used when VIN >
20VDC. Each port has a maximum of 500mA and the combined current maximum between both reader ports
is 600mA.
USB (P1)
The USB port is 5V and has a current maximum of 500mA.

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3.2 Grounding
DC Ground
This is typically the minus (-) side of the DC output of the power supply. This is never to be connected to
Safety (Earth) Ground on the AC side. It is to be connected to the DC ground input of all devices being powered
by one supply. All devices’ ground connections must connect here if the device is powered by this supply.
AC Ground
Known as “Safety”, “Earth”, or “Chassis” ground. To avoid ground loop current, there must be only ONE point
at which the safety ground connects to the DC ground (usually through the DC/DC power supply).
3.3 Communications
3.3.1 Network (P2)
The BLU-IC2 communicates with the Host and other clustered ICs over the network and can also be
configured to communicate with downstream panels over the network. Network connectivity can be achieved
using the dedicated 10/100 Ethernet port and/or the USB port when using an USB-to-Ethernet adapter.
Connection to network switch should be made using standard CAT5e or CAT6 cable.
3.3.2 Downstream RS-485 Serial Ports (TB3 & TB4)
RS-485 is an electrical interface standard for multi-point communication on bus transmission lines. It allows
high-speed data transfer over extended distance (4000 ft, 1219m). The BLU-IC2 can be configured to
communicate with downstream IO or Reader Interface panels on two available RS-485 ports (COM1 & COM2).
The BLU-IC2 supports a 2-wire bus setup. Both ports can be configured to communicate using different
protocols.
Note: COM1 & Reader Port 1 share an internal serial bus and COM2 & Reader Port 2 share another internal
serial bus. Therefore, COM 1 & Reader Port 1 must use the same baud rate and protocol and have unique
addressing between them. COM 2 & Reader Port 2 must also share the same baud rate and protocol
and have unique addressing between them.
Device Wiring
2-wire RS-485 consists of three wires; TR+, TR-, & SG (signal ground). Both TX and RX are done on the
same pair of wires. Match the polarities; connect positive (+) to positive and negative (-) to negative. Wiring
recommendation of 24 AWG, shielded twisted-pair. Wiring requirements satisfied by Belden 9841 or
equivalent.

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Figure 3.1: Device Wiring
Bus Configuration
The maximum number of field devices on one RS-485 bus is 32. Communication cables for RS-485 should
be laid out in a "multi-drop topology". This means that there should only be two ends to the line and devices
should be located directly along this line. The BLU-IC2 controller can be located at any point along the line.
T-stubs longer than 10ft and Star wiring topology will cause communication problems and must be avoided.
Each field device must have a unique address, and all the devices must use the same baud rate (both are
set by the device’s DIP switches, and should have the same corresponding settings in the Host software).
All devices on the RS-485 bus must be communicating with the same protocol.
Serial Bus Topology (Master in Middle) - Correct
Serial Bus Topology (Master at End) - Correct
“Star” Topology - Incorrect
“T stub” Topology - Incorrect
Figure 3.2: RS-485 Bus Topologies

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Termination
For the most reliable communications, the RS-485 bus must be terminated at both ends. The terminators are
integrated on the board and are engaged via user installed jumpers. Never engage termination of devices in
the middle of the communication bus.
External termination modules (ATM-48) are not required but can be used. If using the ATM-48 termination
module, DO NOT install the jumpers on the board. The wiring is as follows:
ATM-48 Pin 1 -> TR+
ATM-48 Pin 2 -> TR-
Signal Ground (SG)
When devices are powered from different power supplies, a common ground reference must be established
on the RS-485 bus. This is the ground (GND) connection on the Serial port connector. Failure to have a
common ground between devices may cause communication errors. If connecting the RS-485 bus with
shielded wire, the shielding can be used as the signal ground connection. Or, if the environment is known to
be electrically noisy, the wire’s shield can be connected to safety/chassis/Earth ground and a separate wire
can be used for signal ground.
Grounding Potential Difference Checks Before Connecting
Before a device is connected to an RS-485 subsystem, it must be checked for ground fault. Ground faults can
damage all devices connected to the RS-485 communication line. To check if there is ground fault for a new
unit, follow the steps below:
1. Apply power to all devices already successfully connected to the RS-485line.
2. Power up the new unit, but DO NOT connect it to the RS-485 line.
3. Connect the signal ground (SG) of the RS-485 line through a 10k limitingresistor.
4. Measure the AC and DC voltage across the resistor. There should NOT be more than 1 volt across the
resistor. Otherwise find and clear thefault.
5. Connect the new unit to the RS-485 line only if no ground fault is found.
3.4 Unsupervised Cabinet Tamper & Power Fault (TB1)
The cabinet tamper (TMP) and power fault (PFLT) inputs only support unsupervised configurations. The
cabinet tamper input is wired to the enclosure and detects when the enclosure door is opened and closed.
The power fault input is wired to the power supply and detects when there is an issue with the power supply.
Wire these inputs with 24 AWG minimum. See “Unsupervised” in Section 3.6.1 wiring diagram.
Figure 3.3: Cabinet Tamper & Power Fault Wiring

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3.5 Reader Ports (TB11 & TB12)
The BLU-IC2 has two onboard reader ports that support both TTL (Wiegand, Clock & Data, etc) and RS-485
(OSDP) readers. The RS-485 reader bus is a true RS-485 port, meeting all requirements of the electrical
standard.
PIN
DESCRIPTION
GND
Ground connection for the reader
DAT/D0 & CLK/D1
TTL or RS-485 reader data connections (see 3.4.1 and 3.4.2 below).
BZR
Open-collector buzzer output. Can also be used for 2-wire LED control
LED
Tri-state LED signal
RVO
Reader power; jumper selectable to either be VIN passthrough or a
regulated 12VDC
3.5.1 TTL Readers
Each reader port on the BLU-IC2 can support one TLL reader. TTL reader types include Wiegand, magnetic
stripe, proximity, bar code, smart card, biometric, keypad, etc. A different type of reader can go on each port.
TTL readers usually utilize all pins on the reader port. The wiring to a TTL reader should be made using 24
AWG minimum, shielded cable with 6 conductors (Belden 9536 or equivalent). Do not exceed 500 feet (152
m) between the BLU-IC2 and reader. 18 AWG cable may be required for long cable lengths or for large current
requirements. If twisted pair cable is used, do not wire Data 1/Clock and Data 0/Data in the same pair. Connect
the shield drain wire of the cable at the GND terminal of the appropriate reader connector on the BLU-IC2.
Carefully insulate the drain wire with sleeving for a reliable installation.
Power for each reader port is provided through the “RVO” pins and is selected with a user-installed jumper.
Power supplied on RVO is either a passthrough of VIN (12-24VDC) or a regulated 12VDC. The reader ports
can supply a COMBINED maximum current of 600mA. If the readers have a greater total power requirement,
or if there are other wiring concerns, external power supplies should be used to power the readers. In this
case, only connect the reader power lines to the external power supply; do not connect the reader to two
powersupplies.
For basic operation of the reader, at a minimum the Data 1/Clock and Data 0/Data wires must be connected
from the reader to the BLU-IC2 and power supplied to the reader. LED and beeper control lines do not have
to be connected, but in this case, the LED and beeper may not function on the reader.
Figure 3.4: BLU-IC2 TTL Reader Wiring