Data Delivery Devices VHF, UHF & ISM Wireless RTU RFScada 8ADI-9DO 4ADI-5DO User Manual

							RFScada 8ADI-9DO/4ADI-5DO Manual Ver 3.6 Copyright ©2005 Data Delivery Devices LLC Page - 21 – Bartlesville OK Tel 918-335-3318      FAX 918-398-9990 
J4  5  Relay two contact normally open 
J4  6  Relay two contact common 
J5  1  Relay three contact normally closed 
J5  2  Relay three contact normally open 
J5  3  Relay three contact common 
J5  4  Relay four contact normally closed 
J5  5  Relay four contact normally open 
J5  6  Relay four contact common 
J7*  1  Relay five contact normally closed 
J7*  2  Relay five contact normally open 
J7*  3  Relay five contact common 
J7*  4  Relay six contact normally closed 
J7*  5  Relay six contact normally open 
J7*  6  Relay six contact common 
J8*  1  Relay seven contact normally closed 
J8*  2  Relay seven contact normally open 
J8*  3  Relay seven contact common 
J8*  4  Relay eight contact normally closed 
J8*  5  Relay eight contact normally open 
J8*  6  Relay eight contact common 
J15  1  RS-232 Modbus Transmit Data 
J15  2  RS-232 Modbus Receive Data 
J15  3  RS-232 Modbus Ground 
J16  1  RS-485 Modbus ‘A’ Transmit / Receive Data 
J16  2  RS-485 Modbus ‘B’ Transmit / Receive Data 
J16  3  RS-485 Modbus Ground 
J16  4  RS-485 Modbus Ground 
J16A  1-8  RS-485 Modbus connection & power to RFScada display unit 
J2  1  External DC Voltage input positive 10 to 28 Volts DC 
J2  2  External DC Voltage input negative (connected to ground) 
J17  1  Fused DC Supply Output positive (for external radio, (4ADI-5DO only)   
J17  2  DC Supply Output negative (connected to ground, for external radio, 4ADI-5DO only)  
 
All signals are identified by the preceding diagram and chart. Note that not all the connections need to 
be used; these will vary depending on the application.  
 
  
						

							RFScada 8ADI-9DO/4ADI-5DO Manual Ver 3.6 Copyright ©2005 Data Delivery Devices LLC Page - 22 – Bartlesville OK Tel 918-335-3318      FAX 918-398-9990 
 
J1, AC Line Input 
  This is 115 VAC line power and ground connection to the unit. Note, depending upon local 
codes grounding may also need to be provided from the steel plate which supports the main board. 
 
 
 
 
 
The non-metallic enclosure does not provide grounding 
from any conduit connections. Always use a ground wire   
from the external power source and ensure that 
connections meet all applicable safety procedures, 
standards and codes. 
  
If the RFScada unit is operating from an external DC supply this connecter may not be used. Note 
that when the connector is plugged in it prevents access to the units AC fuse; power must be removed 
to change the fuse. The RFScada units have extensive AC and DC surge and lightning protection, 
including 150 VAC MOV protection across the AC input after the main fuse. 150 Volt devices are used 
instead of the more common 130 Volt devices to prevent nuisance trips that may be caused by 
unstable power surges, weak power systems, operation from generators etc. The RFScada units may 
operate either from 115 AC power or low Voltage DC, both may be safely connected at the same 
time.  
  The 4ADI-5DO model has an AC power supply capable of operating from 85 to 264 VAC, 
however the 150V AC MOV is normally installed across the AC line input. If operation at higher than 
140 VAC is required please contact the factory for information on ordering a unit with a higher voltage 
rating or for information on installing a higher rated MOV in the field.  
 
 
 
J18, 4-20mA Transducer Power Supply Output 
 This connector provides a DC power supply for external 4-20mA transducers that  require 
power. The DC voltage is approximately 15 Volts DC when the RFScada device is operating from AC 
power, and approximately 1 Volt less than the DC Voltage if operating from DC power. This supply is 
protected on the RFScada board with an electronic fuse, and if too much current is drawn the load will 
have to be removed then restored before power is returned.   
 
J6, J10 Analog Inputs 
  There are the eight analog inputs to 8ADI-9DO and four on the 4ADI-5DO. The 8ADI-9DO 
inputs are normally configured for 4-20 mA , however they may be factory configured for 0 to 10 Volts 
DC. The 4ADI-5DO inputs may be individually configured, in the field, for 0–5 VDC, 0-10VDC or 4-
20mA by moving shorting jumper blocks. 
   
CAUTION 
						

							RFScada 8ADI-9DO/4ADI-5DO Manual Ver 3.6 Copyright ©2005 Data Delivery Devices LLC Page - 23 – Bartlesville OK Tel 918-335-3318      FAX 918-398-9990 
 
When configured for 4-20 mA each of the inputs presents a load of 250 Ohms to ground for 
the external circuit, so each input may also be used for a 0 to 5 Volt DC input providing the external 
circuit is capable of driving the load. On the 8ADI-9DO each analog input is protected against external 
overloads to approximately 40mA, or 10 Volts DC, and on the 4ADI-5DO each analog input is 
protected against overloads to approximately 14 Volts DC by TVSS devices on the board that will 
clamp signals above that level. Permanent damage to the external or input circuitry may occur above 
these levels. If possible a current limited power supply, or even a resistor in series with each current 
loop, may be used to limit current in case the external 4-20mA transducer is accidentally shorted or 
fails. The full scale reading will occur at 20mA input current, so no indication will occur if the input 
current limit is exceeded. The RFScada units have a built in power supply specifically for external 4-
20 mA transducers, or external signal sources may supply the 4-20mA power required. Note that all 
references to 4-20mA input actually allow accurate signal measurements from 0 to 20mA, so broken 
4-20mA ‘loops’ may reliably detected. See the following examples for some connection possibilities. 
If the 4ADI-5DO is configured for 0–5 Volt DC input then a high input impedance of 
>100KOhms is presented. Although 15Volt TVSS devices on board will clamp any stray input voltages 
to a safe level, incorrect stray input values may be reported if the inputs are not connected to a signal 
source. This may be prevented by configuring unused inputs as 4-20ma or 0-10VDC. 
When the 4ADI-5DO is configured for 0-10VDC analog input it presents a load of 2KOhms to 
the applied signal. 
 
    
 
 
 
External signal amplifier, PLC or PC with analog 4-20mA output 
 
 
 
 
Configuring Analog Inputs of 4ADI-5DO 
1 
     Install jumpers for analog inputs 
1 
1 
1 
None 0–5 V     
1 to 2  0–10 V     
2 to 3 4–20 mA 
1 
1 
1 
1 
Connector J6
Analog channel 12 34
Jumper    
4-20mA Current Loop 
4-20mA return current  250 Ohm 
Grounded 
Load  4-20mA Signal Amplifier 
Signal source, voltage, 
transducer etc 
RFScada  
						

							RFScada 8ADI-9DO/4ADI-5DO Manual Ver 3.6 Copyright ©2005 Data Delivery Devices LLC Page - 24 – Bartlesville OK Tel 918-335-3318      FAX 918-398-9990  External DC power supply and 4-20mA transducers 
 
 
 
 
 
 
  If possible each input should have its own current return (the odd numbered pins on these 
connectors) to maintain highest accuracy, however they may share ground connections in some 
cases to save wiring. Do not use the system ground as a return for the current loops when using an 
external supply, as it may cause errors and external ‘ground fault’ protectors may trip. Since each 
input is grounded the RFScada unit must be the only ‘grounded’ part of the current loop if several 
devices are in series in a 4-20mA loop.  The resolution of each analog input is 10 Bits, or 0.09775%,  
representing 0.01955mA per bit. The overall accuracy is slightly less than this, as it also depends on 
parameters such as temperature variations, the voltage reference accuracy etc. There are several 
ways to supply 4-20mA signals and power to the RFScada units, the previous diagrams shows some 
possibilities.  
 
250 Ohm 
Grounded 
Load 
RFScada 
External 4-20mA Current 
Transducer, e.g. Pressure, 
Temperature etc.  
4-20mA 
transducer  
power 
supply 
External 4-20mA Current 
Transducer, e.g. Pressure, 
Temperature etc.  Etc.. 
+ve -ve  J18 
External transducers using RFScada’s built in 4-20mA transducer power source 
No 
connection 
250 Ohm 
Grounded 
Load 
RFScada 
External 4-20mA Current 
Transducer, e.g. Pressure, 
Temperature etc.  
+ve External power 
supply, 10 – 30 Volts 
DC for 4-20mA  
Transducers 
-ve 
External 4-20mA Current 
Transducer, e.g. Pressure, 
Temperature etc.  Etc.. 
NOTE 
Ensure 4-20mA 
current returns 
via loop and not 
through the 
system ground   
NOTE 
Grounding the 4-
20mA loop here 
alone may cause 
system loop errors 
and ground faults. 
   
						

							RFScada 8ADI-9DO/4ADI-5DO Manual Ver 3.6 Copyright ©2005 Data Delivery Devices LLC Page - 25 – Bartlesville OK Tel 918-335-3318      FAX 918-398-9990 
J12, J3 Local Contact Inputs 
  These are transient protected, dry-contact switch or logic level inputs to the RFScada device. 
Each of the inputs is pulled up to 5 Volts DC via a 1K Ohm resistor, so the inputs may be activated 
either by a shorting switch contact to ground or they may be directly driven from an ‘open collector’ 
logic level. 
 
 
  Each input connection has a corresponding ground connection on connectors J12 and J3, but 
it is permissible for these switch inputs to share a common ground connection to save on wiring. Note 
that each of these inputs is protected from Voltage surges and impulses by individual TVSS surge 
protectors, which short-out negative Voltages and clip any Voltage spikes above approx 6 Volts DC, 
preventing damage to the RFScada unit. Under no circumstances should any external voltage be 
applied to these connectors, as damage may occur. Since these inputs are protected from Voltage 
spikes and surges the input signals may be run substantial distances without risk of damage. When 
each input is ‘active’, i.e. shorted to ground, a corresponding green LED will illuminate next to the 
active input. If a TVSS input protection device had been damaged due to excessive input current the 
LED may remain on and the input appear to be active all the time, even with no input switch or signal 
connected.  
 
 
J11 Network Status Relay Contacts 
  J11 is connected to the contacts of a single-pole double-throw relay, which respond to the 
state of the system ‘network’ state. This relay and LED will be continually energized (LED on), when 
this unit and all other configured units in this network are successfully operating and communicating 
amongst one another. If this relay and LED is slowly toggling on and off it indicates that this unit and 
the master unit are successfully communicating, but at least one unit in the network is not responding. 
In this case normally all outputs, both analog and digital, will revert to an inactive (i.e. off) state. (See 
the section on ‘Comm Fail Override’ options for alternative methods of operation). If this relay and 
LED are continually off it indicates that this unit and the master unit are not communicating, and again 
all outputs, both analog and digital, will revert to an inactive (i.e. off) state.  
  This LED and relay are very useful, as they indicate status of the complete system from every 
unit, if the LED and relay are active the complete network and all units are operating correctly. The 
relay contact is rated for 8 Amps at 115 VAC, or 5 Amps at 30 V DC. If loads greater than this are to 
be controlled a suitable larger capacity relay could be driven from these.  
For some solar powered applications where power consumption is important this relay may be 
disabled, so saving power (approx. 30mA on 12 VDC systems). On the 4ADI-5DO unit the relay may 
RFScada 
Open Collector  Relay Contacts  
Switch 
Relay Coil Power  
Examples of Digital Signal Input Methods  
						

							RFScada 8ADI-9DO/4ADI-5DO Manual Ver 3.6 Copyright ©2005 Data Delivery Devices LLC Page - 26 – Bartlesville OK Tel 918-335-3318      FAX 918-398-9990 
be disabled by moving a jumper on the board. All the software settings are unaffected by this jumper; 
it merely physically disables power to the relay. Once the system has been verified fully operational 
the jumper may be placed in the power save position; of course it may be placed back in the normal 
position to verify correct operation at any time. 
 
J4, J5, J7 & J8 Output Relay Contacts 
  These connect to the contacts of single-pole double-throw relays, with each relay driven from 
its ‘configured’ input signal source. Each relay has a corresponding red status LED by the connector, 
for visual indication of the output state. Note that the relays will normally only become active when the 
system network status is good; (see the section on ‘Comm Fail Override’ options for alternative 
methods of operation). Each relay contact is rated for 8 Amps at 115 VAC, or 5 Amps at 30 V DC. If 
loads greater than this are to be controlled a suitable larger capacity relay could be driven from these. 
 
J15, Modbus RS-232  
  This connector brings out the Modbus, or configuration communications signals from the 
RFScada unit at RS-232 levels. Note that the RFScada board has both RS-232 and RS-485 
interfaces built in, however only one may be active at a time. To use the RS-232 interface remove the 
two pin shorting block (if installed) from J9 on the 8ADI-9DO. On the 4ADI-5DO install the jumper 
block  between pins 2 and 3 on the jumper pins between connector J15 and J16. Refer to the 
‘Modbus Configuration, Control and Monitoring’ section for further details on PC programming and 
connection.   
 
J16, Modbus RS-485  
  This connector brings out the Modbus, or configuration communications signals from the 
RFScada unit at RS-485 levels. Note that the RFScada boards have both RS-232 and RS-485 
interfaces built in, however only one may be active at a time. To use the RS-485 interface install the 
two pin shorting block (if not already installed) between the two pins on J9. On the 4ADI-5DO move 
the jumper between pins 1 and 2 on the three jumper pins located between connectors J15 and J16.  
Refer to the ‘Modbus Configuration, Control and Monitoring’ section for further details on PC 
programming and connection.   
 
J2, External 10 to 28 Volt DC Input 
  This is the low voltage input power connector, and if used may be connected to a 10 to 28 
Volts DC external power source. Note that pin 2 is connected to ground on the circuit board and is 
common to all the other pins that connect to ground. If an external ground is not connected via the 
115 VAC power connector (J1), then an external ground should be connected to this pin. Note, 
depending upon local codes grounding may also need to be provided from the steel plate which 
supports the main board. 
 
 
 
 
 
The non-metallic enclosure does not provide grounding 
from any conduit connections. Always use a ground wire   
from the external power source and ensure that 
connections meet all applicable safety procedures, 
standards and codes 
 
The 8ADI-9DO unit is diode protected from reverse polarity, has an electronic fuse and is also 
protected by a TVSS surge protector (33 Volt rating). Care should be taken to prevent exceeding the 
DC Voltage rating. If the DC Voltage exceeds the specified rating the unit may shutdown due to the 
CAUTION 
						

							RFScada 8ADI-9DO/4ADI-5DO Manual Ver 3.6 Copyright ©2005 Data Delivery Devices LLC Page - 27 – Bartlesville OK Tel 918-335-3318      FAX 918-398-9990 
electronic fuse tripping. If this occurs remove DC power, wait a few seconds then restore DC power; 
normal operation should resume.  
The 4ADI-5DO unit is diode protected from reverse polarity, has an electronic fuse protecting 
the on board components, a mechanical (2A 250VDC) fuse protecting the ‘pass thru’ external radio 
connection (J17) and is also protected by a TVSS surge protectors (33 Volt rating) so care should be 
taken to prevent exceeding the DC Voltage rating. If the DC Voltage exceeds the rating the unit may 
shutdown due to the electronic fuse tripping. If this occurs DC power will then need to be removed 
and then restored after a few seconds to resume normal operation. The RFScada units may operate 
either from 115 Volts AC power or low Voltage DC, both may be connected at the same time.  
 
Transmit / Receive LED’s 
  These two LED’s (red receive, green transmit) illuminate each time the unit completes a data 
transmission or verified data reception. Normally the two LED’s will be flashing in sequence as the 
unit communicates with other units. If the unit receives data not intended for it the red LED may flash 
but not the green; so in systems with more than one slave the receive LED may flash many times 
before a transmission occurs. If the receive LED flashes quickly but the transmit LED never flashes it 
is possible the master is configured not to communicate with this particular slave unit. If the receive 
LED flashes slowly (approximately once per second) it indicates that this slave unit is not detecting 
any transmitted data. If the transmit LED flashes but not the receive LED it indicates that this unit is 
the network master but no slaves are responding to the transmitted data. These two LED’s give a 
quick indication of communications, and are very useful in the case of marginal data communications, 
configuration setup or antenna adjustments. Remember that the yellow ‘network state’ LED and relay 
will also give indication of the network status at all times. 
    
ISM High Power Radio Transmit / Receive LED’s 
  These two LED’s (red receive, green transmit) illuminate each time data is transmitted or 
received from the ISM spread spectrum high power radio transceiver. Depending on the mode it is 
programmed to operate in the LED’s may flash multiple times for each transmission and reception. 
These LED’s are not used with any other radio option. 
 
System / Modbus LED 
This yellow system / Modbus LED indicates system activity, such as during a power up, each Modbus 
or configuration data reception. It will also flash slowly for a few seconds when configuration settings 
are being stored in the units non volatile memory.   
 
Antenna Connector 
If board mounted radio options are installed this connection will be used for either the internal or 
external antenna. Note that this precision connector is very fragile; care should be taken when 
removing or installing antenna connectors. Do not use the internal antenna to support the board 
assembly if it has to be removed. See the section on external antennas for more details.   
 
F1, AC Power Fuse 
A user replaceable fuse and a transient arresting MOV protect the board.  
 
 
 
Possibly lethal line voltages will be present on the unit’s 
circuit board when connected to AC line power. Before 
attempting to gain access, test or modify connections 
refer to a Qualified Person for assistance, instructions on 
safe operation and to ensure that connections meet all 
applicable safety procedures, standards and codes. 
 
DANGER 
						

							RFScada 8ADI-9DO/4ADI-5DO Manual Ver 3.6 Copyright ©2005 Data Delivery Devices LLC Page - 28 – Bartlesville OK Tel 918-335-3318      FAX 918-398-9990 
The fuse will blow if there is a malfunction in the circuit, or a voltage greater than the board rating is 
applied to the AC line input. The fuse is located underneath a safety cover. To test and replace the 
fuse proceed as follows: 
First remove the AC and DC (if used) power to the unit. Then open the unit and unplug the AC power 
connector J1 to allow access to the fuse. Remove the fuse safety cover which also holds the fuse. 
Using an Ohm Meter measure the resistance of the fuse, if the resistance is high or infinite the fuse 
has failed and needs to be replaced. If it has failed discard and replace with a spare 2 Amp 250VAC 
fuse that is supplied with the unit. Do not use a fuse with any other rating. Replace the fuse safety 
cover. To check AC operation any external DC supply, if connected, must also be removed. If the unit 
does not power up correctly please contact Data Delivery Devices LLC for assistance. Once correct 
operation has been verified the DC supply, if used, may be re-connected.  
  
						

							RFScada 8ADI-9DO/4ADI-5DO Manual Ver 3.6 Copyright ©2005 Data Delivery Devices LLC Page - 29 – Bartlesville OK Tel 918-335-3318      FAX 918-398-9990