Macurco RD-24 User manual

IMPORTANT: Keep these user instructions for reference.
Macurco™ RD-24
Modbus Remote Driver
Installation & Operation Manual

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Table of Contents
1 General Safety Information........................................................................................................................................................3
1.1 List of warnings .................................................................................................................................................................3
2 Use Instructions and Limitations................................................................................................................................................3
2.1 RD-24 General Description................................................................................................................................................3
2.2 Features.............................................................................................................................................................................3
2.3 Specifications ....................................................................................................................................................................3
3 Installation Instructions .............................................................................................................................................................4
3.1 Location & Mounting.........................................................................................................................................................4
3.2 Installation.........................................................................................................................................................................5
3.2.1 General Wiring Information .....................................................................................................................................5
3.2.2 Power Connection ....................................................................................................................................................5
3.2.3 RS-485 Communication Connection.........................................................................................................................6
3.2.4 Input/Output Connections .......................................................................................................................................7
3.2.5 Expansion Board Connections ..................................................................................................................................8
4 Operations .................................................................................................................................................................................9
4.1 Power up ...........................................................................................................................................................................9
4.2 Initial Operating Mode ......................................................................................................................................................9
4.2.1 RD-24 Settings ..........................................................................................................................................................9
4.2.2 Programming Mode..................................................................................................................................................9
4.2.3 Configuration Refresh.............................................................................................................................................10
4.3 Configuration...................................................................................................................................................................10
5 Appendix A –Table of Figures..................................................................................................................................................15
6 Appendix B –Modbus Registry ................................................................................................................................................16
6.1 Read Configuration..........................................................................................................................................................17
6.2 Fail-safe ...........................................................................................................................................................................17
6.3 Configure Analog Outputs Range....................................................................................................................................17
6.4 Multipurpose command..................................................................................................................................................17
6.5 Write Output Command Expansion Boards #1, #2, #3 and #4........................................................................................18
7 Macurco Gas Detection Product limited warranty ..................................................................................................................23
Technical Support Contact Information........................................................................................................................................23
General Contact Information........................................................................................................................................................23

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1General Safety Information
1.1 List of warnings
WARNING
Each person using this equipment must read and understand the information in this user manual
before use. Use of this equipment by untrained or unqualified persons or use that is not in accordance
with this user manual, may adversely affect product performance.
RD-24 may not function effectively below 32°F (0°C) or above 125°F (52°C). Using the equipment
outside of this temperature range may adversely affect product.
Immediately exit any environment that causes an alarm condition on the sensor.
Do not disassemble unit or attempt to repair or modify any component of this instrument. This
instrument contains no user serviceable parts, and substitution of components may adversely affect
product performance and void product warranty.
2Use Instructions and Limitations
2.1 RD-24 General Description
The RD-24 is a remote input/output device that allows flexibility for applications needing more relays, analog outputs, or analog
inputs. Using Modbus communication, you can control multiple I/O based on the application. The RD-24 requires 24VDC to
operate and can be used to engage or disengage other equipment such as: fans, louvers, horns, strobes, gas valves, etc. The
remote device can be wired in daisy-chain on the gas detector loop to save wire and allows for great flexibility for mounting
location.
2.2 Features
•Modbus addressable remote device: relays, analog output, analog input
•Compatible with the Macurco DVP-1200 control panel
•Wall mount NEMA 4X enclosure
•4 expansion slots for expansion boards: up to 8 relays, 8 analog outputs, or 16 analog inputs, or combination of the
three
•24VDC Input
•Status Indicators (LED): Power, communication, Slot 1-4
2.3 Specifications
•Size: 10.26” x 11.06” x 3.16” (26.06 x 28.09 x 8.03 cm)
•Weight: 2.8 lbs. (1.3 kg)
•Voltage/Current: Power Input: 24VDC, 2A Overcurrent Projection
•RD-24 Current Draw without expansion boards: 20mA
•Operating Temperature: 32 to 125°F (0 - 52°C)
•Ambient Humidity: 0% - 95% RH non-condensing
•Mounting: Mounting holes in each corner
•Expansion Slots: 4
•Expansion Relay Board: 2 SDPT, 250VAC, 10A Max (resistive)
•Expansion Analog Input Board: 4 Analog Inputs
•Expansion Analog Output Board: 2 Analog Outputs

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•Current: 1.2A Max (4 Analog Input Boards each with 4 sensors reading 100% of their value)
•Settings: Dip Switch –8 positions
•Status Indicators: (LED): Power, communication, Slots 1-4
•Baud Rate: 4800, 9600, 19200 (default), 98400, 57600, 115200 bps
•Enclosure: NEMA 4X
•Warranty: Two-year limited warranty
3Installation Instructions
3.1 Location & Mounting
Macurco RD-24 is shipped with mounting screws. RD-24 should be mounted with sufficient space all around for access to
conduit entry holes (not provided) top and bottom side of the unit.
Figure 3-1 –Internal view without expansion boards

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Figure 3-2 –Internal view with expansion boards
3.2 Installation
3.2.1 General Wiring Information
All the connectors in RD-24 are spring tightening (*excluding the Analog Input board) and will accept wire from 14 to 24 AWG.
To connect the wires to terminals, press down the white button of the connector (use flat-headed screwdriver), insert bare wire
into respective wire cavity of the connector and release the white button. Ensure that the wire cannot be easily pulled from the
connector. Refer to Figure 3-2 - below for location of different connectors in RD-24.
*The Analog Input board has 4 screw-terminal connectors.
3.2.2 Power Connection
The power connections to the RD-24 should be size AWG18 (minimum) for short runs. For longer runs, follow recommended
power wire gauge guidelines. Match the polarity for power connection.

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3.2.3 RS-485 Communication Connection
For RS-485 or communication connection it is recommended to always use a twisted wire to reduce noise and allow for reliable
data communication over greater distances. For best performance use shielded 3-conductor wire with one twisted pair
providing a pair for signal (A & B), common (COM) and shield ground (SHD) connection.
NOTE: Running the RS-485 cable adjacent to or in the same conduit with high voltage wires is not recommended as there may
be interference from the high voltages.
The RD-24 provides integral termination for end of line resistors (EOL). The termination uses a 4-pin connector (labeled J8) to
select termination. Place the EOL jumper on one of the following positions:
•NU = No termination (default)
•120 = 120 Ohm
•100 = 100 Ohm
Figure 3-3 –EOL Jumper Placement

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3.2.4 Input/Output Connections
Figure 3-4 –RD-24 Board Diagram
Macurco RD-24
Dip Switch
EOL Resistor
RS-485 COMMS
IN/OUT
POWER
IN/OUT
Expansion Board #2
SHD
COM
B
A
SHD
COM
B
A
GND
GND
24V
24V
Expansion Board #1
Expansion Board #3
Expansion Board #4

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3.2.5 Expansion Board Connections
3.2.5.1 Expansion Relay Board
2 SDPT, 250VAC, 10A Max (resistive), Current: Single Relay activated 35mA, Both relays activated 55mA
Figure 3-5 Relay Expansion Board
3.2.5.2 Expansion Analog Output Board
Expansion Analog Input Board: 2 Analog Outputs, Both outputs at 4mA Current: 32mA, Both at 20mA
Current: 70mA
Figure 3-6 Analog Output Expansion Board
3.2.5.3 Expansion Analog Input Board
Expansion Analog Output Board: 4 Analog Inputs Current: no sensor 21mA, one sensor at 0% 48mA, one
sensor at 100% 75mA
Figure 3-7 Analog Input Expansion Board

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4Operations
4.1 Power up
Power LED will light up green to indicate the unit is operational. TX LED will flash blue to indicate the unit is communicating.
Slot 1, Slot 2, Slot 3 and Slot 4 will light up green when corresponding relay is activated/populated. Refer to Figure 3-3 above for
location of Slot 1-4.
4.2 Initial Operating Mode
4.2.1 RD-24 Settings
The DIP switches are used to set the Modbus address and are also used to change the communication settings. Valid Modbus
addresses for RD-24 are from 193 to 200 where switch 1 is the least significant bit (LSB) and switch 8 is the most significant bit
(MSB). Address 254 is used to place the RD-24 in programming mode. Address 255 is used to refresh the configuration of the
RD-24.
4.2.2 Programming Mode
When the RD-24 is powered with address set to 254, it enters programming mode. The STATUS LED will be flashing RED and
GREEN alternatively every 200 milliseconds to indicate that RD-24 is ready and waiting for the user to enter new communication
settings using 8 dip switches. Using the 8 dip switches, the user can change the communication settings like baud rate and
parity.
When looking at the switches with “Address” marking on top, the switches are defined from left to right.
•Switch 8, switch 7 and switch 6 are used to modify baud rate
•Switch 5 and switch 4 are used to modify parity
•Switch 1 is used to request to save the new settings
•Switches 3 and 2 are unused and should be left in the ON position.
Switch 8
Switch 7
Switch 6
Description
OFF
OFF
OFF
Default Value (19200 Bd)
OFF
OFF
ON
4800 Bd
OFF
ON
OFF
9600Bd
OFF
ON
ON
19200 Bd (Default value)
ON
OFF
OFF
38400 Bd
ON
OFF
ON
57600 Bd
ON
ON
OFF
115200 Bd
ON
ON
ON
Do not change
Table 4-1 –Baud Rate Configuration

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Switch 5
Switch 4
Description
OFF
OFF
Default Parity EVEN (Default Value)
OFF
ON
Parity is ODD
ON
OFF
Parity is NONE
ON
ON
Do not change
Table 4-2 –Parity Configuration
Set the switches to the desired value and then set switch 1 to ON and then OFF, and the new settings will be saved
in EEPROM.
The result of saving operation is displayed on STATUS LED. Alternating GREEN/OFF every 200 milliseconds indicates
saving new settings passed and alternating RED/OFF every 200 milliseconds indicates that saving new settings failed.
Once the new settings have passed, disconnect power from the unit, set the address for the device using the
address switches and apply power back to unit.
4.2.3 Configuration Refresh
Upon initial installation, or when the user would like to change the RD-24 configuration (move, swap, or change
expansion board type or locations), the following process must be followed. Before making any changes, power off
the RD-24. Next, make the preferred changes to the RD-24 configuration. After, set the dip switch address to 255 and
power on the RD-24 for at least 3 seconds. The LED below the dip switch should blink green rapidly. After at least 3
seconds, power off the RD-24. Using the dip switch, change the address back to its original setting, or a number
between 193 and 200. Power on the RD-24. Last, navigate in the DVP-1200 menu CONFIGURE SYSTEM →MANUAL
CONFIGURE →CONFIG. RLYS,SIGNALS,SENSORS,REM. DEV. →REMOTE DEVICES. Select the Remote Device and delete
it from the DVP-1200. If the RD-24 is still powered on, the DVP-1200 will automatically find it back and update the
configuration. If the DVP-1200 does not find the device after 60 seconds, power cycle the panel and check again.
4.3 Configuration
4.3.1.1 Configure RELAY(S)
Menu path: Main Menu-->CONFIGURE SYSTEM -->MANUAL CONFIGURE -->CONFIGURE ZONES -->ADD/EDIT ZONES--
>RELAY(S): -->
NOTE: Programming Configure Relays - The panel has 8 onboard relays so remote relays start at 9. Reference the
Remote Device: I/O Chart at the end of this manual.
To add relays to a zone or delete relays assigned from a zone, select “RELAY(S):” from the zone configuration menu
and press ENTER. Then, select ADD RELAY or DELETE RELAY as shown below. The bottom box of the display will show
any relays assigned to the zone and will get updated as you make changes.