Broadcast Tools SR-4 G2 User manual
Installation and Operation Manual
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Due to the dynamic nature of product design, the information contained in this
document is subject to change without notice. Broadcast Tools, Inc., assumes no
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of this information or new editions may be issued to incorporate such changes.
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Manual update: 8/2/2021
Firmware Version: 1.07 or higher
If you need a firmware upgrade, contact Broadcast Tools®
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ALL SPECIFICATIONS AND FEATURES FOR THIS PRODUCT ARE SUBJECT TO
CHANGE WITHOUT NOTICE
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Smart Relay 4 G2 (SR-4 G2)
Four Channel Smart GPIO Converter
INC
®
Smart Relay 4 G2 Installation and Operation Manual
Table of Contents
Section Title Page #
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Who to Contact for Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Features/Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Installation/Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Surge Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
UPS Standby Power System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
LED Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
USB Serial PGM Port. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Inputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Input Jumper Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Relay Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Operation Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Channel Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Mode Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Programming
Programming Steps. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Set Timers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Set Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Restoring Factory Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Front and rear panel drawings . . . . . . . . . . . . . . . . . . . . . . . . Appendix
Connector and configuration jumper layout . . . . . . . . . . . . . Appendix
Fractional schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Appendix
WEBSITE:
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2
CONTENTS
Smart Relay 4 G2 Installation and Operation Manual
INTRODUCTION
INTRODUCTION
Thank you for your purchase of the Smart Relay 4 G2 Four Channel Smart GPIO
Converter, which we will refer to throughout the manual as the Smart Relay 4 G2.
We are confident this product will give you many years of dependable service. This
manual is intended to give you all the information needed to install and operate the
Broadcast Tools® Smart Relay 4 G2.
SAFETY INFORMATION
Only qualified technical personnel should install the Smart Relay 4 G2. Any attempt
to install this device by a person who is not technically qualified could result in a
hazardous condition to the installer or other personnel or damage to the Smart Relay
4 G2 or other equipment. Please ensure that proper safety precautions have been
taken before installing this device. If you are unfamiliar with this type of equipment,
please contact a properly qualified engineer to handle the installation and setup of
the Smart Relay 4 G2. Broadcast Tools, Inc., is unable to support NON-Broadcast
Tools software, hardware, or NON-Broadcast Tools computer/hardware/software
problems. If you experience these problems, please research your hardware/software
instruction manuals, or contact the manufacturers technical support department.
WHO TO CONTACT FOR HELP
If you have any questions regarding your product or you need assistance, please con-
tact your distributor from whom you purchased this equipment. If you would like
more information about BROADCAST TOOLS® products, you may reach us at:
Broadcast Tools, Inc.
131 State Street
Sedro-Woolley, WA 98284-1503 USA
Voice: 360.854.9559
Fax: 866.783.1742
Internet Home Page: www.broadcasttools.com
E-mail:[email protected]
THANK YOU FOR CHOOSING
BROADCAST TOOLS® BRAND PRODUCTS!
CAUTION!
Broadcast Tools®
Products, as with any
electronic device, can
fail without warning.
Do not use this product
in applications where a
life threatening condition
could result due to failure.
NOTE:
This manual should be
read thoroughly before
installation and operation.
WEBSITE:
Visit our web site for
product updates and
additional information.
Broadcast Tools is a Veteran Owned Business
Designed, Assembled and Supported in WA State, USA
Smart Relay 4 G2 Installation and Operation Manual
OVERVIEW
Product Overview
The Smart Relay 4 G2 provides four independent GPIO interfaces in one box, each
equipped with two optically isolated inputs (wet or dry) and a 2PDT relay output.
The Smart Relay 4 G2 is perfect for converting differing logic levels to contact clo-
sures. Additional features include: Independent user programmable Boolean logic
and pulse stretching (delays) from 50ms to 99 hours, 59 minutes, 59.99 seconds.
Features/Benefits
• All I/O connections via pluggable screw terminal blocks.
• Each 2PDT relay channel can be configured with two independent optically
isolated inputs configurable for dry signals or wet signals (5-24 VDC, or 25-
48 VDC via an external resistor.)
• LED status indicators are provided for each relay, input, and power.
• Fifteen logic functions include, sustained, toggle, set-reset (flip-flop), dual
alternate action or failing/rising edge, along with additional Boolean logic
functions.
• Independent pulse stretcher or time delays may be user programmed from
50ms to 99 hours, 59 minutes, 59.99 seconds.
• Timing and mode configuration from a non-dedicated PC using the USB-
serial connection.
Applications
• Convert differing logic levels to 2PDT contact closures.
• Time delay relays
• Pulse stretcher
• Sustained contact to pulse converters
• Rising and/or falling edge pulse converters
• Latching (flip-flop) relays
• Toggle action relays
• Dual alternate action relays
• Additional Boolean logic functions include: XOR, AND, NAND, OR, NOR.
Inspection
Please examine your Smart Relay 4 G2 carefully for any damage that may have been
sustained during shipping. If any damage is present, please notify the shipper imme-
diately and retain the packaging for inspection by the shipper. The package should
contain the Smart Relay 4 G2, a power supply, and a USB-A/B cable. Manuals may
be downloaded from our web site.
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Smart Relay 4 G2 Installation and Operation Manual
INSTALLATION
Installation/Operation
Power
Connect the 2.1mm barrel type center positive power connector into the unit and the
included 9 to 12 VDC power supply with domestic connector into a 120 Vac 50-60 Hz
power source.
NOTE: Never use any type of power supply other than the specified/supplied
power supply. Check the power jack on the back of the unit to determine which
power supply is required.
Surge Protection
The Smart Relay 4 G2 has built-in resistance to voltage changes; we recommend that
you use a power surge protector or line conditioner on the incoming AC line.
Lightning strikes and/or other high voltage surges may damage your Smart Relay 4 G2
and connected equipment if it is not properly protected. For lightning protection
devices, check out www.polyphaser.com and www.itwlinx.com.
UPS Standby Power System
We recommend that you connect your Smart Relay 4 G2 to a UPS standby power
system. A UPS helps minimize the risk to the Smart Relay 4 G2 and provides power
during a power outage.
Wire Prep
The Smart Relay 4 G2 interfaces to external equipment through removable euro-block
screw terminals. The terminals accommodate wire sizes from 16 - 28 AWG solid or
stranded wire. Before installing a wire, remove the euro-block screw terminal plug and
turn each capture screw fully counterclockwise. Strip each conductor to a length of
0.25” and insert the conductor fully into the terminal. Turn the capture screw fully
clockwise to secure the conductor.
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Smart Relay 4 G2 Installation and Operation Manual
INSTALLATION
Inputs
Each optically isolated input has a terminal labelled “xA” and a terminal labelled
“xB”. Inputs can be configured for either wet or dry operation via internal jumpers.
The factory default configuration is dry, where the “A” side of the input is ground
(GND) and the “B” side of the input is the cathode (-) of the opto-isolator. In this
configuration 5V is applied internally to the anode (+) of the opto-isolator. This con-
figuration is best for interfacing with external dry contact relay outputs, switches,
and open collector outputs.
In the “wet” configuration an external voltage must be applied to the input to acti-
vate the opto-isolator. When configured for wet operation the “A” side of the input
is the anode (+) and the “B” side of the input is the cathode (-). This configuration
is best where full isolation is preferred or when interfacing with external
voltage/logic level outputs.
Each optically isolated input is connected through an internal 2.2k ohm series cur-
rent-limiting resistor directly to an opto-coupler circuit so no external resistor is nec-
essary if the input voltage is between 5 and 24 VDC. Higher DC voltages, from 25
to 48 VDC, can be used but must be reduced with an additional external resistor of
the appropriate value and power rating to limit the input current.
Here is how to calculate the value and power rating of an external current limiting resis-
tor for DC voltages up to 48 VDC: Each opto-isolated input has an internal 2.2K ohm
series resistor. The opto-isolator works well with an input current of 9 mA and has a
voltage drop of around 1.2V. With this information we can determine the correct exter-
nal series current limiting resistor value needed for other voltages using the equation:
R = ((Vin-1.2)/0.009)-2200
Where:
R = External resistor value required
Vin = Desired input voltage
1.2 V = Forward voltage drop of the LED in the opto-isolator
0.009 A = Nominal LED current
2200 ohms = Internal resistor
For example:
To connect a 48 VDC signal voltage to an input on the Smart Relay 4 G2 in “wet”
configuration the completed equation for the external resistor value would be:
R = ((48-1.2)/0.009)-2200 = 3000 ohms
To calculate the power dissipated by the external resistor, the equation would be:
P = I x I x R, so the resistor must be at least .009 x .009 x 2200 = 0.243 Watts,
use a 1/2 Watt rated resistor.
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Smart Relay 4 G2 Installation and Operation Manual
INSTALLATION
Input Jumper Configuration
Each input is equipped with an internal four-position header and two jumpers. The
headers are labeled JPx and are numbered IN-1 through IN-8. The factory default
configuration is for a DRY input (relay contact, switch, open collector) with a
jumper over pins 1 & 2 and another jumper over pins 3 & 4. To change the input to
WET (user supplied voltage between 5 and 24 VDC, or 25-48 VDC with an exter-
nal resistor), remove both jumpers and place ONE jumper over pins 2 & 3.
Relay Outputs
The Smart Relay 4 G2’s relays are 2PDT normally open/dry. Make your connections
to the desired relays K1 A/B thru K4 A/B. Front panel LEDs indicate when a relay
is active.
CM = Common Relay Contact (Wiper)
NO = Normally Open Relay Contact
NC = Normally Closed Relay Contact
LED Indicators
• “PWR”: Power LED (Green).
• “K1”- “K4” Relay LEDs: Lit when the corresponding relay is on. (Green)
• “1-8” Input LEDs: Lit when the corresponding input is on. (Yellow)
USB PGM Port
The front-panel USB type-B port is used to connect the Smart Relay 4 G2 to a com-
puter for configuration via a virtual COM port. See the “Programming” section of
this manual for more information on setting modes and timers for each channel.
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Smart Relay 4 G2 Installation and Operation Manual
OPERATION
Operation Overview
Each of the four GPIO channels consist of two optically isolated inputs and one
2PDT relay output. The first input in each channel is referred to as the “odd” input
(1, 3, 5, 7) and the second input is referred to as the “even” input (2, 4, 6, 8.)
Each relay’s factory default mode setting is Mode 00, where the relay closes when the
odd input is active and opens when the odd input is inactive. See the Mode Settings
and Programming sections of the manual for more information on configuring the
relay section for different logic and timing functions using the USB serial port.
A third non-isolated override input labelled “Rx” is present and allows the user to
trigger the channel’s relay outputs via a sustained closure to ground, overriding the
opto-isolated inputs and the logic functions.
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Smart Relay 4 G2 Installation and Operation Manual
OPERATION
Mode Settings
Mode 00: Relay output closes when the odd input is active and opens when the odd
input is inactive. (Factory Default)
Mode 01: Relay output toggles on leading edge of the odd input.
Mode 02: Relay output closes on the leading edge of the odd input. Relay remains
closed until the leading edge of the even input is active.
Mode 03: Relay output closes after the odd input has been active for the pro-
grammed time period. It opens after the even input is closed for the time period.
Mode 04: Relay closed on the leading edge of the odd input. The relay opens after
the trailing edge is closed for the time period.
Mode 05: Relay output closes on leading edge of the odd input for time period.
Mode 06: Relay output closes for the time period on the trailing edge of the odd
input.
Mode 07: Relay output closes for the time period on the leading or trailing edge of
the
odd input.
Mode 08: Relay output closes on leading edge of the odd input and remains closed
for at least the time period. If the odd input stays active for longer than the time peri-
od, the relay will open on the trailing edge of the odd input.
Mode 09: Relay output closes on the leading edge of the odd input for no longer than
the time period. If a trailing edge is encountered before the time has expired, the
relay will open with the edge. Otherwise, the relay opens when the time period
expires.
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Smart Relay 4 G2 Installation and Operation Manual
OPERATION
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Smart Relay 4 G2 Installation and Operation Manual
PROGRAMMING
Programming
The Smart Relay 4 G2’s modes and timers are programmed via its USB serial PGM
port using an interactive text-based setup menu from a serial terminal application.
Connecting via the USB Serial “PGM” port:
1. Connect the supplied USB A/B cable from the “USB PGM” jack on the SR-4
G2 front panel to an available USB port on your PC. When you first plug the
SR-4 G2 into your PC, it should automatically install the correct FTDI USB
Serial “Virtual COM port” drivers which will allow you to access the SR-4 G2
on a COM port.
NOTE: If the SR-4 G2’s FTDI USB Serial “Virtual COM port” drivers
do not automatically install they may be downloaded from the link on
our Downloads page: https://broadcasttools.com/downloads/
2. Start a serial terminal application like PuTTY, Tera Term or HyperTerminal
configured for the connected COM port set to 9600 baud, 8, N, 1, flow control
to NONE, Emulation set to ANSI, and local character echo enabled.
Programming Steps:
1. Type P in the terminal to enter Program Mode and the Program Menu will
be displayed in the terminal window:
BTI SR4 G2 Program Menu v1.07
1 - Set Timers
2 - Set Modes
Enter 1 or 2
2. Type 1 to set timers, type 2 to set relay modes.
Set Timers:
Each of the four channels can be programmed with a timer value from 0 to 99 hours, 59
minutes, 59.99 seconds. The default timing value shown below is 50ms for each channel.
Current Settings HRS:MINS:SECS.NN
CH1: 00:00:00.05
CH2: 00:00:00.05
CH3: 00:00:00.05
CH4: 00:00:00.05
Select1-4
1. Type the channel number 1, 2, 3 or 4.
2. Type a timer value of as an eight-digit value (00000000-99595999). Do not
type the ":" or “.” they will be entered automatically. For example, to set a
timer to 1 second type: 00000100 and press enter. To return to the Program
menu press the ESC key.
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Smart Relay 4 G2 Installation and Operation Manual
PROGRAMMING
Set Modes
Each of the four channels can be programmed with its own independent mode/logic
function. See the Mode Settings section of this manual for information on the modes
available. The default mode for each channel is: 00.
Current Mode Settings:
CH1: 00
CH2: 00
CH3: 00
CH4: 00
Select1-4
1. Type the channel number 1, 2, 3 or 4.
2. Type a timer value of as a two-digit value (00-15). For example, to set a
channel to mode 05 type: 05 and press enter. To return to the Program menu
press the ESC key.
To exit Program mode, press the ESC key until “EXIT PGM” is displayed. Program
mode will be exited automatically after 60 seconds of keyboard inactivity.
Restoring to factory defaults:
The default program values may be reloaded at any time by removing power from
the Smart Relay 4 G2, holding down the front panel Defaults (Def.) button and
plugging in the power and then releasing the Defaults button after a few seconds.
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Smart Relay 4 G2 Installation and Operation Manual
SPECIFICATIONS
SPECIFICATIONS
Inputs: (8) Optically isolated (5 to 24 VDC, or 25-48 VDC via an external
resistor.) wet or dry inputs.
Default = Dry (5 volts internally sourced). With front panel LED
indicators.
Relay Outputs: (4) 2PDT, 1 amp @ 30 VDC maximum relays. Sealed relays utilizing
2 - form – C, Bifurcated-Crossbar silver alloy with gold overlay
contacts. With front panel LED indicators.
Logic Flash Microprocessor with non-volatile memory.
USB Serial: 9600, 8, N ,1 / USB type B female. FTDI Chipset.
Connectors: Inputs and Relay Outputs: (4) 6-position pluggable screw terminal
blocks.
Power: 9 to 12 VDC only, greater than 500 mA. 2.1mm ID x 5.5mm OD
coaxial connector, center positive, surge protected. Universal
switching power supply with domestic connector supplied.
International power supply optional.
Dimensions: 6.25” W x 7.75” D x 1.63” H
Weight: 3 lbs.
Options: RA-1 Rack Shelf. 1 RU. Accommodates up to 2 units. Note: Velcro
may be used to secure the product to the RA-1 shelf. International
power supply.
CAUTION!
For safety, never con-
nect 120 Vac circuits to
the inputs or relays!
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14
Smart Relay 4 G2 Installation and Operation Manual
LIMITED WARRANTY
LIMITED WARRANTY
The term “Buyer” as used in this document refers to and includes both (but only) (a) any person or entity who acquires such an item for
the purpose of resale to others (i.e., a dealer or distributor of an item), and (b) the first person or entity who acquires such an item for
such person’s or entity’s own use.
Broadcast Tools warrants to each Buyer of any item manufactured by Broadcast Tools that the item will be free from defects in materi-
als and workmanship at the time it is shipped by Broadcast Tools if the item is properly installed, used and maintained.
EXCLUSIVE REMEDIES
If Broadcast Tools is notified, in writing, of a failure of any item manufactured by Broadcast Tools to conform to the foregoing Limited
Warranty within one (1) year following the date of the Buyer’s acquisition of the item, and if the item is returned to Broadcast Tools in
accordance with Broadcast Tools’ instructions for confirmation by inspection of the defect (which at Broadcast Tools’ election may
include, without limitation, a requirement that the Buyer first obtain a Return Authorization number from Broadcast Tools, that the Buyer
furnish proof of purchase in the form of an invoice and/or receipt, and that the Buyer prepay all freight charges associated with any return
of the item to Broadcast Tools using such freight service as Broadcast Tools reasonably may specify), Broadcast Tools will repair or
replace the defective item, or will refund the purchase price paid by the Buyer for the item. Broadcast Tools shall have the exclusive
right to choose between these alternative remedies.
NO OTHER WARRANTIES OR REMEDIES
TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, BROADCAST TOOLS AND ITS SUPPLIERS DISCLAIM ALL OTHER
WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABIL-
ITY OR FITNESS FOR A PARTICULAR PURPOSE; AND THE FOREGOING ALTERNATIVE REMEDIES SHALL BE EXCLUSIVE OF
ALL OTHER REMEDIES. THIS LIMITED WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS. YOU MAY HAVE OTHER RIGHTS,
WHICH VARY FROM STATE/JURISDICTION TO STATE/JURISDICTION.
NO LIABILITY FOR CONSEQUENTIAL DAMAGES
TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, NEITHER BROADCAST TOOLS NOR ANY OF ITS SUPPLIERS
SHALL HAVE ANY LIABILITY FOR ANY SPECIAL, INCIDENTAL, INDIRECT, CONSEQUENTIAL OR PUNITIVE DAMAGES WHATSO-
EVER (INCLUDING, WITHOUT LIMITATION, ANY DAMAGES FOR LOST PROFITS, BUSINESS INTERRUPTION, LOSS OF DATA OR
INFORMATION, COST OF CAPITAL, CLAIMS OF CUSTOMERS, OR ANY OTHER PECUNIARY LOSS) ARISING OUT OF THE USE
OF OR THE INABILITY TO USE ANY ITEM SUPPLIED BY BROADCAST TOOLS, EVEN IF BROADCAST TOOLS HAS BEEN
ADVISED OF THE POSSIBILITY OF SUCH DAMAGES HAVE ANY LIABILITY FOR ANY SPECIAL, INCIDENTAL, CONSEQUENTIAL,
EXEMPLARY OR PUNITIVE DAMAGES. THIS LIMITATION OF LIABILITY APPLIES WHETHER A CLAIM IS ONE ALLEGING
BREACH OF A CONTRACT OR WARRANTY, NEGLIGENCE OR OTHER TORT, FOR THE VIOLATION OF ANY STATUTORY DUTY,
THE FAILURE OF ANY LIMITED OR EXCLUSIVE REMEDY TO ACHIEVE ITS ESSENTIAL PURPOSE, OR ANY OTHER CLAIM OF
ANY NATURE. BECAUSE SOME STATES AND JURISDICTIONS DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY
FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES, THIS LIMITATION MAY NOT APPLY TO YOU.
Broadcast Tools, Inc.
131 State Street
Sedro-Woolley, WA 98284 • USA
360.854.9559 voice •866.783.1742 fax
www.broadcasttools.com website
Smart Relay 4 G2 Installation and Operation Manual
15
APPENDIX
K1
K2
K3
K4
USB PGM PWR Def.RELAYS INPUTS
Smart Relay 4 G2
1
2
3
4
5
6
7
8
PWR
9-12 VDC
Chs Gnd
1A
3A
1B
3B
2A
4A
2B
4B
GND
GND
R1
R2
5A
7A
5B
7B
6A
8A
6B
8B
GND
GND
R3
R4
1CM
2CM
1NC
2NC
1NO
2NO
1CM
2CM
1NC
2NC
1NO
2NO
3CM
4CM
3NC
4NC
3NO
4NO
3CM
4CM
3NC
4NC
3NO
4NO
Product_Name Installation and Operation Manual
Component Layout
Smart Relay 4 G2
U03 ULN2803
NC-
NO
C
+
K4
C17
NC-
NO
C
+
K2 7805
U4
C04
L4
U14
IN4
IN3
IN2
IN1
K4
K3
K2
K1
U01 18F25K22
D1
U02
1
FT232RL
C02
4
32
1
C11
L5
C01
RN3
C09
R04
RN4
4N264N26 4N264N26
RN1
C16
RN5
U15
IN8
IN7
IN6
IN5
R07
C20
JP2
C19
C07
D2
NC-
NO
C
+
K3
C18
C05
C06
D4
L1
C10
R01
IN-7 IN-8
RN2
IN-3 IN-4
05
GND
04 06
SL3
01
5A
6B
03
6A
5B
02
8B
1110
SL4
GND
12
TB2
7A
0807
8A
7B
09
04 05
GND
06
SL1
0201
1A
03
2B
2A
GND
4B
1110
SL2
12
TB1
1B
3A
07
4A
3B
0908
NC-
NO
C
+
K1
IN-2IN-1 IN-6IN-5
4N26
4N26 4N264N26
U03
K4
K2
SR-4 G2
225201
REV-B1
74HC04
LED4
LED2
15
14
J3
U01
U09U05 U06
20
10
25
5
U10
LED3
LED1
S1
PWR
74HC04
U15 U14
K3ACM
K3ANC
K4ANC
01 02
K1BNO
K1BNC
K2BNC
K2BNO
05 06
TB4
K4ACM
07 0811 12
J1 CH1
06
K3ANO
K3BCM
K3BNC
K3BNO
0403 05
K4BNC
11
K4BNO
12
K4ANO
09
K4BCM
10
K3 C14C15
JP6JP4
03 04
K1BCM
01
K1ACM
02
K1ANO
K1ANC
K2ANO
09
K2BCM
10
TB3
K2ACM
0807
K2ANC
2
JP3
1
U08 U11
4
U07
3
JP5
56
K1
7
U12
8
Smart Relay 4 G2Smart Relay 4 G2
Component Layout
IN5
IN6
IN7
IN8
PWR
LED1
LED3
Smart Relay 4 G2
Component Layout
K1
K2
K3
K4
IN1
IN2
IN3
IN4
LED2
Smart Relay 4 G2
Component Layout
N3
N
K2
K3
K4
3
4
N3
J3
S1
C
C
9
C
C
U15
R07
C20
C19
U15
74HC04
LED3
U
U14
RN5
U14
LED2 LED4
74HC04
C
1
C
C
F
C
C
C
C
C
F
D1
FT23
1
C
1
2
C
L5
1
C1
RN3
C01
C09
LED4
RL
R
32RL
U02
C02
U01 18F25K22
R04
JP2
5
25
U01
C
C
U01 18F25K22
C07
10
20
14
15
C
C
C04
-B1
REV
V-
225201
SR-4 G2
4N26
JP3
U05
RN
RN
RN4
4N264N26 4N264N26
RN1
5
JP5
1
JP3
2
U10
U06U05 U09
C
C
O
N
K
N
C
6
C
N
K
N
C
U03 ULN2803
C17
K2
+
C
NO
-
NC
C16
6
JP5
K2
U03
C
O
N
K
N
05
4
7
780
4
U4
U4
C
N
K
N
5
7
80
C
U4
U4
K4
+
C
NO
-
NC
U4
7805
L4
C0
K4
U03
C
C
C0
IN-3
IN-1
3A
1B
1A
01
4N26
U07
JP4
(Default)
Dry
JP3-JP6
etW
IN-4
IN-8
IN-1
IN-5
I
N
N
N
RN
1
N
I
N
N
RN
N
N
RN2
IN-7IN-3
7B
8A
7A
8B
02
5B
6A
03
6B
5A
01 04
GND
05
3B
4A
1B
SL2
4B
GND
2A
2B
0302
SL1
06
GND
0504
IN-2
4N26
IN-6
4N26 4N264N26
U12
7
34
1
U1U08
JP4 JP6
0
C
0
M
0
M
0
O
C
0
O
0
M
0
C
C
O
N
K
N
C
N
K
N
C18
GND
SL4
SL3
06
GND
05
K1
+
C
NO
-
NC
8K1
K2ANC
K2ACM
K2BCM
K2ANO
K1ANC
02
K1ANO
03
K1ACM
01
K1BCM
04
JP6
K4ACM
06
K1BNO
05
K1BNC
K2BNO
K2BNC
01
K3ACM
C
0
M
0
O
0
0
O
C
0
C
O
N
K
N
6
N
K
N
D2
K3
+
C
NO
-
NC
D4
06
L1
C15
K3
K4BCM
K4ANO
K4BNO
K4BNC
05
K3BNC
03
K3ANO
04
K3BCM
K3BNO
06
J1
02
K3ANC
K4ANC
5
C
C
05
R01
C10
C14
CH1
07
07
3A
TB1
10
1
07
09
08
10
1
12
09
08
09
7B
8A
07
08
7A
TB2
10
1
8B
08
09
3B
4A
12
SL2
10
1
1
1
4B
GND
1
12
07
1
12
09
10
07
08
12
GND
SL4
1
1
1
K2ANC
07
08
K2ACM
TB3
10
K2BCM
09
K2ANO
12
1
1
1
07
K4ACM
TB4
K2BNO
K2BNC
08
12
1
09
10
10
K4BCM
09
K4ANO
12
K4BNO
1
1
1
K4BNC
08
TB4
K4ANC
16
APPENDIX
Product_Name Installation and Operation Manual
Fractional Schematic
Smart Relay 4 G2
131 State Street, Sedro-Woolley, WA 98284 • 360.854.9559 • Fax 866.783.1742
Visit us online at www.broadcasttools.com
Copyright © 1989-2021 by Broadcast Tools, Inc. All Rights Reserved.
Smart Relay 4 G2
Fraction
Smart Relay 4 G2
nal Schematic
Smart Relay 4 G2
Modified 04/29/21 131 State Street, Sedro-Woolley, WA 98284 • 360.854.9559 • Fax 866.783.1742
Copyright © 1989-2021 by Broadcast Tools, Inc. All Rights Reserved.
Visit us online at www.broadcasttools.com
131 State Street, Sedro-Woolley, WA 98284 • 360.854.9559 • Fax 866.783.1742
Copyright © 1989-2021 by Broadcast Tools, Inc. All Rights Reserved.
Visit us online at www.broadcasttools.com
131 State Street, Sedro-Woolley, WA 98284 • 360.854.9559 • Fax 866.783.1742
Copyright © 1989-2021 by Broadcast Tools, Inc. All Rights Reserved.
131 State Street, Sedro-Woolley, WA 98284 • 360.854.9559 • Fax 866.783.1742
17
APPENDIX
Table of contents
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