Distech Controls IO-R-16 User manual

Mounting and Wiring Guide
Remote IO-R-34 Module
Remote IO-R-34 Module Mounting and Wiring Guide
August 2, 2017
1
Niagara Framework is a trademark of Tridium, Inc.
This document covers the mounting and wiring of the IO-R-34 module
for expanding an EC-BOS-8. It assumes that you are an engineer,
technician, or service person who is performing control system design
or installation. Please read through this entire document before
beginning the installation procedures.
Product Description
The IO-R-34 expands an EC-BOS-81with 34 I/O points that can be
remotely located, including:
•16 Universal Inputs (UIs) compatible with 0-10Vdc, 0-20mA, dry
contacts, pulsing dry contacts, 0-100K ohm resistive, or Type 3 thermistor temperature sensors.
•10 Digital Outputs (DOs) with Form-A relay contacts for on/off control of loads up to 24Vac/dc, at 0.5A max.
•8 Analog Outputs (AOs) for 0-10Vdc analog control of loads at 2.5K ohm minimum, or 4mA drain maximum.
The IO module uses DIN rail mounting and has two end-mounted 5-pin connectors that support direct-chaining
(in-line attachment) to IO-R-16 modules.
Communications to an EC-BOS-8 uses RS-485 multidrop on 3 wires of an end-mounted 5-pin connector. The other
two wires are for OUTPUT power (15 Vdc) used to power IO-R-16 modules. The IO-R-34 can provide power to up
to 4 attached IO-R-16 modules (if used). A two position connector is provided for primary power input to the module.
The RS-485 bus is wired back to Com 1 or Com 2 of the EC-BOS-8.
Related Documentation
For more information on mounting, wiring and configuring a system, refer to the EC-BOS-8 Mounting & Wiring
Guide, Remote IO-R-16 Mounting and Wiring Guide, and the NRIO Driver Guide.
System Planning
System planning requires consideration of options regarding power, RS-485 communications, mounting and wiring.
The following sections describe communications and power variables to consider before mounting and wiring your
hardware.
Number of Supported Expansion Modules
An EC-BOS-8 can support a maximum of 8 IO-R-34 modules OR a maximum of 16 IO-R-16 modules on a single
RS-485 bus. So, the IO-R-34 counts as two IO-R-16 modules. For example, the EC-BOS-8 could support 2 IO-R-34
modules and 12 IO-R-16 modules. Table 1 shows possible options for combinations of IO-R-16 and IO-R-34
modules.
1. EC-BOS-8 with EC-Net 4.3 and later and an available RS-485 port.
See “System Planning” on page 1 for more details.

Remote IO-R-34 Module Mounting and Wiring Guide
August 2, 2017
System Planning
Power Supply Options and Considerations
2
Power Supply Options and Considerations
The IO-R-34 is a 24Vac or dc powered device compatible with EC-BOS-8 input power requirements. Use a
dedicated transformer to supply 21.6 to 26.4Vac/dc power to the module. Only the EC-BOS-8 and IO-R-34 modules
should be powered from the same transformer. Wire the input voltage to the module’s 2-pin 24Vac/dc power
connector, located on the lower right corner of the unit.
Table 1 shows possible combinations. For example, Option 2 includes a total of 14 IO-R-16s and one IO-R-34. Four
of the IO-R-16s are powered by the IO-R-34. The remaining 10 IO-R-16s must be powered by an external source.
Both IO-R-16 and IO-R-34 should have a UPS power backup if continuous operation during power failures is a
requirement. These modules do not support the battery powered configurations provided on some legacy hardware.
The 5 pin power/comm connectors do not include a battery pin, preventing connection to (and possible damage
from) legacy controllers.
Note When cabling power to modules located some distance from the controller, you should allow for voltage
drops introduced by cabling distances.
Operation without power backup
If an IO-R-34 module is powered locally and a momentary AC power loss occurs, note that a number of undesirable
things can result, including:
•Load cycling from module relays dropping out, including several seconds lag to first re-establish
communications with the EC-BOS (Nrio driver) before relays can pull in again, as needed.
•Totalized “counts” zeroed out.
•History (logging) entries for associated IO points as “down,” as well as Nrio “device down” alarms.
Table 1 IO Module Combinations and IO-R-16 Power Options
Combinations Module Number of Devices Powered by IO-R-34(s) Powered by External Supply
Option 1 IO-R-16 16 016
IO-R-34 0
Option 2 IO-R-16 14 410
IO-R-34 1
Option 3 IO-R-16 12 8 4
IO-R-34 2
Option 4 IO-R-16 10 10 0
IO-R-34 3
Option 5 IO-R-16 8 8 0
IO-R-34 4
Option 6 IO-R-16 6 6 0
IO-R-34 5
Option 7 IO-R-16 4 4 0
IO-R-34 6
Option 8 IO-R-16 2 2 0
IO-R-34 7
Option 9 IO-R-16 0 0 0
IO-R-34 8

Preparation
Preparation
Remote IO-R-34 Module Mounting and Wiring Guide
August 2, 2017
3
Further, loss of power without backup makes an IO firmware upgrade a risky operation. Such an upgrade is initiated
from the “Nrio Device Manager” view (in a station connection to the EC-BOS). If this upgrade process is interrupted
by a IO-R-34 power cycle, the module may be rendered inoperable—and will likely need to be replaced. Therefore,
consider providing UPS backup power.
Configure default settings for comm loss scenarios—You can use EC-Net Pro to configure default AO and
DO values to be set in case of a power outage or other communications-loss situations. The feature is configurable
for timing and function. You can choose to use it on Powerup, CommLoss, both or neither. See the Nrio Driver Guide
for details.
Preparation
Unpack the IO-R-34 and inspect the contents of the packages for damaged or missing components. If damaged,
notify the appropriate carrier at once and return any damaged components for immediate repair or replacement. See
“Returning a Defective Unit” on page 17.
Included in this Package
Included in this package you should find the following items:
•IO-R-34 module with quick-disconnect female connectors.
• Remote IO-R-34 Module Mounting and Wiring Guide.
•Hardware bag containing the following items:
– One (1) grounding wire, with quick-disconnect 0.187" female connector.
– Sixteen (16) 499-ohm resistors, used for 4–20mA input
Material and Tools Required
The following supplies and tools are required for installation:
•A suitable power source, as one of the following:
– UL listed, Class 2, 24Vac transformer, rated a minimum of 21.6 to 26.4Vac and 28VA. Note that a
dedicated transformer is required. Only an EC-BOS-8 and the IO-R-34 may be powered from the same
transformer.
– 22 to 26.4Vdc power supply capable of supplying at least 916mA (22 Watts). This is sufficient to power a
fully loaded IO-R-34 (4 IO-R-16 modules plus the IO-R-34).
•DIN rail, type NS35/7.5 (35mm x 7.5mm) and low-profile DIN rail end-clips (stop clips), recommended for
mounting with the controller. The DIN rail should be sufficient length to accommodate both the EC-BOS-8 and
any other modules. See Figure 1 on page 6.
•Suitable screws and screwdriver for mounting DIN rail, or if DIN rail not used, for mounting bases of the
EC-BOS-8 and the module. A small flat-bladed screwdriver is needed for wiring terminals.
Precautions
This document uses the following warning and caution conventions:
Caution Cautions remind the reader to be careful. They alert readers to situations where there is a chance that
the reader might perform an action that cannot be undone, might receive unexpected results, or might
lose data. Cautions contain an explanation of why the action is potentially problematic.
Warning Warnings alert the reader to proceed with extreme care. They alert readers to situations where
there is a chance that the reader might do something that can result in personal injury or
equipment damage. Warnings contain an explanation of why the action is potentially dangerous.

Remote IO-R-34 Module Mounting and Wiring Guide
August 2, 2017
Precautions
Safety Precautions
4
Safety Precautions
The following items are warnings of a general nature relating to the installation and start-up of the EC-BOS-8. Be
sure to heed these warnings to prevent personal injury or equipment damage.
Warning • A 24Vac or 24Vdc circuit powers the IO-R-34 and EC-BOS-8. Disconnect power before installation or
servicing to prevent electrical shock or equipment damage.
• Make all connections in accordance with national and local electrical codes. Use copper conductors
only.
• To reduce the risk of fire or electrical shock, install in a controlled environment relatively free of
contaminants.
• Controllers and I/O modules are only intended for use as monitoring and control devices. To prevent
data loss or equipment damage, do not use them for any other purposes.
Static Discharge Precautions
These items are cautionary notes to help prevent equipment damage or loss of data caused by static discharge.
Caution • Static charges produce voltages high enough to damage electronic components. The
microprocessors and associated circuitry within an IO-R-34 are sensitive to static discharge. Follow
these precautions when installing, servicing, or operating the system:
•Work in a static-free area.
•Discharge any static electricity you may have accumulated. Discharge static electricity by touching
a known, securely grounded object.
•Do not handle the printed circuit board (PCB) without proper protection against static discharge.
Use a wrist strap when handling PCBs, with the wrist strap clamp secured to earth ground.
Module Connection Precautions
Caution Do not connect more than the maximum number of IO-R-34 modules to the RS-485 port of the parent
EC-BOS controller—note that 8 is the maximum number supported in software. However, less IO-R-34
modules may be supported. See “Number of Supported Expansion Modules,” page 1.
Caution Connect S terminal wiring as shown in Figure 6 or communication errors may result. S terminal serves
as reference ground between isolated RS-485 ports on EC-BOS-8, IO-R-16 and IO-R-34 modules.

Installation and Start-up Outline
WEEE (Waste of Electrical and Electronic Equipment)
Remote IO-R-34 Module Mounting and Wiring Guide
August 2, 2017
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WEEE (Waste of Electrical and Electronic Equipment)
Recycling of Electronic Products: (International Installations):
In 2006 the European Union adopted regulations (WEEE) for the collection and recycling of all waste electrical and
electronic equipment. It is no longer allowable to simply throw away such equipment. Instead, these products must
enter the recycling process. To properly dispose of this product, please take it to a local recycling center. If a local
recycling center cannot be found, please return it to one of these offices:
http://www.distech-controls.com/Contact/Contact.html
Installation and Start-up Outline
Note If installing the EC-BOS-8 and IO-R-34s at the same time, please refer to the appropriate installation
document.
The major steps to installing and starting the IO-R-34, are outlined as follows:
1. Physically mount the module with the EC-BOS-8. See “Physical Mounting.” If directly attaching to other
modules, ensure that the 5-position end connector(s) are properly seated into the end connector(s) of the other
units. Note the previous “Module Connection Precautions” on page 4.
2. Make wiring connections for grounding, 24Vac power, and I/O wiring. See “Wiring Details,” page 7.
3. Apply power and perform an initial checkout. See “Power up and Initial Checkout” on page 15.
Physical Mounting
The following applies to mounting an IO-R-34 module with an EC-BOS-8:
Note Horizontal mounting is strongly recommended to achieve maximum heat dissipation and meet the operating
temperature upper limit. Any other mounting orientation reduces this upper limit.
•Mounting on a 35mm wide DIN rail is recommended. The IO-R-34 unit base has a molded DIN rail slot and
locking clip, which simplifies mounting with other modules. Mounting on a DIN rail ensures accurate alignment
of connectors between all modules.
•If DIN rail mounting is not practical, you can use screws in mounting tabs on the IO-R-34.
Procedure 1 To mount IO-R-34 on existing installed DIN rail.
Step 1 Pull or pry down the plastic locking clip until it snaps into the open (down) position.
Step 2 Position the IO-R-34 module on the rail, tilting to hook the top DIN rail tab over the upper edge of the DIN
rail (Figure 1). Rotate the module flush against the DIN rail and then press the locking clip upward to
release it and secure the module to the rail.
Step 3 Slide the IO-R-34 module along the DIN rail to its intended location. If connecting to an IO-R-16 module,
seat the 5-position plug into that module’s connector socket.
Step 4 Carefully install DIN rail end clips to secure the assembly. Make sure that the DIN rail stops do not press
against the end connectors on the IO-R-34 or other modules.
Caution • Do not mount hardware on both a DIN Rail and with tab mounts to another surface. This causes
physical stress on equipment and prevents good connections between controller and modules.
•Do not mount DIN rail stops so that they press against module end connectors. If possible, use
low-profile rail stops to eliminate possibility of contact and damage to the connectors.

Remote IO-R-34 Module Mounting and Wiring Guide
August 2, 2017
Physical Mounting
Physical Mounting
6
Step 5 Repeat this for all items, until all are mounted on the DIN rail(s), firmly connected to each other, and
secured with DIN rail end clips.
Figure 1 IO-R-34 module mounting details.
Note To remove an IO-R-34 module from a DIN rail, remove DIN rail end clips and (if applicable) slide it away
from other modules. Move the plastic locking tab down to open position then lift unit outwards.
Figure 2 Tab Mounting Dimensions.
Mounting on DIN Rail Removing from DIN Rail
U80VU7U6
0V
U5
0V
U3 U4
0VU1 U2 U16
0VU15U14
0V
U13
0V
U11 U12
0VU9 U10 ACAC
AO1 0V AO2 AO3 0V AO4 0V AO6
AO5 0V AO8
AO7
D5 5 C6 D6 D7 7C8 D8 9C10 D10
D9
24Vac/24Vdc
IO-R-34IO-R-16IO-R-16
DIN rail clip
both ends
5-position connector
plug with cabling to
EC-BOS and other remote
modules.
3.31in.
84.0mm
6.71in.
170.5mm
3.75in. (95.25mm)
6.39in. (162.2mm)
5.35in. (135.9mm)
1.60in.
(40.8mm)

IO-R-34 Board Layout and Terminal Locations
IO-R-34 Board Layout and Terminal Locations
Remote IO-R-34 Module Mounting and Wiring Guide
August 2, 2017
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IO-R-34 Board Layout and Terminal Locations
The IO-R-34 provides 16 universal inputs compatible with 0–10Vdc, 0–20mA, dry contacts, pulsing dry contacts, 0–
100K ohm resistive, or Type 3 thermistor temperature sensors, and 18 outputs: 10 relay (24Vac/dc, 0.5A max.)
outputs and 8 analog outputs (0–10 Vdc). Wiring terminal positions are shown in Figure 3, along with LED locations.
Figure 3 IO-R-34 Wiring Terminal Locations.
Wiring Details
See Figure 3 above to locate connectors and other components on the IO-R-34 module.
Make connections to the IO-R-34 in the following order.
1. Connect the earth grounding wire (with spade connector) from the earth ground lug on the IO-R-34 to a nearby
earth grounding point. See “Grounding” for details.
2. Wire the supply power to the IO-R-34, but do not energize the power source until all other wiring is completed.
See “Power Wiring” for details.
3. Connect RS-485 wiring between the IO-R-34 and the EC-BOS-8, and (if applicable) to other modules (for
example: IO-R-16, IO-R-34, or IO-16-485) in a continuous multidrop fashion. See sections “RS-485
Communications” on page 9, “Inputs” on page 10, and “Outputs” on page 13.
Caution Connect S terminal wiring as shown in Figure 6 or communication errors may result. S terminal serves
as reference ground between isolated RS-485 ports on EC-BOS-8 and IO-R-16 and IO-R-34 modules.
4. Apply power to the unit. See “Power up and Initial Checkout,” page 15.
DL 11
Relay Output
LEDs (Yellow)
5 pin connector
15Vdc Output
Power
RS-485
5 pin connector
15Vdc Power
RS-485
P-
P+
RS-485-
RS485+
RS-485 S
P-
P+
RS-485-
RS485+
RS-485 S
D1 1C2 D2 D3 3C D4 D5 5C6 D6 DY 7C8 D8 D9 9C10 D10
Digital Relay Outputs (D1-10)
A01 0V A02 A03 0V A04 A05 0V A06 A07 0V A08
Analog Vdc Outputs (A01-8)
Universal In
p
uts (U1-16)
U1 0V U2 U3 0V U4 U5 0V U6 U7 0V U8 U9 0V U10 U11 0V U12 U13 0V U14 U15 0V U16
Status LED
(Green)
Earth Ground
Connector Lug
24Vac or Vdc
Power

Remote IO-R-34 Module Mounting and Wiring Guide
August 2, 2017
Wiring Details
Grounding
8
Grounding
An earth ground spade lug (0.187") is provided on the base of the IO-R-34 for connection to earth ground. For
maximum protection from electrostatic discharge or other forms of EMI, connect each earth ground using a #16
AWG or larger wire. Keep these wires as short as possible.
See Figure 4 for the location of the earth grounding wire for the IO-R-34.
Figure 4 Earth ground connection required to the IO-R-34 module as well as IO-R-16 modules, if used.
Power Wiring
The IO-R-34 can be powered by wiring to a dedicated Class 2, 24V transformer, or to a 24Vdc power source. The
IO-R-34 can share transformer power with an EC-BOS-8.
Note If powering from a 24V transformer, do not also power equipment (other than an EC-BOS-8) with the same
transformer. Otherwise, conducted noise problems may result. Also, do not ground either side of the
transformer’s 24V secondary.
As shown in Figure 5, the IO-R-34 2-position power connector is located at the lower corner of the unit. Unplug the
connector from the module and install wire connections to the connector as shown.
Note Do not apply 24V power (reinsert connector plug into the IO-R-34) until all other wiring is completed,
including IO-R-34 inputs and outputs. See “Power up and Initial Checkout,” page 15.
Caution Do not connect two or more IO-R-34 modules together. Connecting IO-R-34 modules directly to each
other may allow for hardware configurations that lead to equipment damage.
U80VU7U6
0V
U5
0V
U3 U4
0VU1 U2 U16
0VU15U14
0V
U13
0V
U11 U12
0VU9 U10 ACAC
AO1 0V AO2 AO3 0V AO4 0V AO6
AO5 0V AO8
AO7
D5 5 C6 D6 D 7 7C8 D8 9C10 D10
D9
IO-R-34IO-R-16IO-R-16
Earth Ground

Wiring Details
Remote IO-R-34 Module Mounting and Wiring Guide
August 2, 2017
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Figure 5 IO-34 Power Wiring to 24vac/dc Power Source, shared with EC-BOS-8.
RS-485 Communications
RS-485 communications from the EC-BOS-8 to each IO module (or assembly of modules) requires a continuous
“daisy-chain” wiring topology using a shielded, twisted-pair cable. Wire between the IO-R-16 assemblies using the
5-position end connectors. At the EC-BOS-8, wire to either of its 3-position RS-485 connectors.
Use shielded 18-22AWG wiring (refer to the TIA/EIA-485 standard). Wire in a continuous multidrop fashion, meaning
“plus to plus,” “minus to minus”, and “shield to shield.” Connect the shield wire (reference ground) to earth ground
at one end only, such as at the EC-BOS. See Figure 6.
Bias Settings
Each RS485 port on the EC-BOS-8 has an adjacent 3-position biasing switch, with these settings:
•BIA - (Default, middle) RS485 biasing and termination: 2.7K Ohm bias resistors with no termination resistor
•END - RS485 biasing and a termination: 562 Ohm bias resistors and 150 Ohm termination resistor
•MID - RS485 biasing or termination: 47.5K bias resistors with no termination resistor
Often, adding RS-485 biasing can improve communications by eliminating indeterminate idle states.
•BIA - (Default, middle) Often best if the RS485 trunk needs biasing, but when the EC-BOS is not installed at the end of the
trunk.
•END - Often best if the EC-BOS is installed at the end of an RS485 trunk of devices that is not already biased.
•MID - Often best if the EC-BOS is put in the middle of an already-biased RS485 trunk.
If desired, you can change the position of an RS485 port’s bias switch while the controller is running.
Caution Connect S terminal wiring as shown in Figure 6 or communication errors may result. S terminal serves
as reference ground between isolated RS-485 ports on EC-BOS-8 and IO-R-16 and IO-R-34 modules.
U80VU7U6
0V
U5
0V
U3 U4
0VU1 U2 U16
0VU15U14
0V
U13
0V
U11 U12
0VU9 U10 ACAC
AO1 0V AO2 AO3 0V AO4 0V AO6
AO5 0V AO8
AO7
D5 5 C6 D6 D7 7C8 D8 9C10 D10
D9
* Dedicated 24Vac Transformer neither side of secondary tied to earth ground
* 24Vdc Power Supply (Polarity not Critical) neither side tied to earth ground
or
24Vac/24Vdc
Power Source
IO-R-34IO-R-16IO-R-16
EC-BOS-8

Remote IO-R-34 Module Mounting and Wiring Guide
August 2, 2017
Wiring Details
Inputs
10
Figure 6 RS-485 wiring from the EC-BOS to one or more IO-R-34 modules uses a “daisy-chain” connection.
Inputs
Each of the 16 universal inputs (UI) can support any one of the following:
•Type-3 10K ohm Thermistor (also see Caution on page 11)
•Resistive 0-100K ohms
•0–10 Vdc
•4–20 mA
•Binary Input
Thermistor
The inputs support 10K Thermistor temperature sensors. Input accuracy is in the range of ±1% of span. By default,
conversion is for a standard Type 3 thermistor sensor, with a sensor range of -10° to 135°F (-23.3° to 57.2°C). Using
a conversion type of “Tabular Thermistor,” you can specify a different thermistor response curve, by importing a
thermistor curve .xml file.
The kitIo module contains an xml folder with thermistor curves for a various thermistor
temperature sensors. You can also edit and export (for reuse) customized thermistor curve xml files. See the NRIO
Driver Guide for details
.
Figure 7 shows the wiring diagram.
U80VU7U6
0V
U5
0V
U3 U4
0VU1 U2 U16
0VU15U14
0V
U13
0V
U11 U12
0VU9 U10 ACAC
U8
0VU7U6
0V
U5
0V
U3 U4
0VU1 U2 U16
0VU15U14
0V
U13
0V
U11 U12
0VU9 U10 ACAC
AO1 0V AO2 AO3 0V AO 4 0V AO6
AO5 0V AO8
AO7
D5 5 C6 D6 D7 7C8 D8 9C10 D10
D9
IO-R-34IO-R-16
AO1 0V AO2 AO3 0V AO 4 0V AO6
AO5 0V AO8
AO7
D5 5 C6 D6 D7 7C8 D8 9C10 D10
D9
IO-R-34
S
+
–
Terminals on the 5-position
connector plugs used for RS-485
between IO-R-34 assemblies
-
+
S
EC-BOS-8 RS-485 Port
Shielded twisted pair cabling
Connect RS-485 shield wire to ground at one end only
Add up to 4 IO-R-16
modules per IO-R-34
One or more IO-R-34

Wiring Details
Inputs
Remote IO-R-34 Module Mounting and Wiring Guide
August 2, 2017
11
Figure 7 Thermistor wiring.
Resistive 0-100K ohms
The inputs can read a resistive signal within a range from 0 to 100,000 ohms. Wiring is the same as shown for a
Thermistor temperature sensor (Figure 7).
Resistive signals require a ResistiveInputPoint.
Caution UI inputs provide optimum resistive-to-temperature resolution in the 10K ohm range. For a sensor with
a range far from 10K ohms (such as a 100-ohm or 1000-ohm sensor), resolution is so poor as to be
unusable!To successfully use such a sensor, install a transmitter that produces a Vdc or mA signal,
and then wire the transmitter to the UI according to the 0–10 Vdc or 4–20 mA instructions.
0–10 Vdc
The inputs support self-powered 0–10 Vdc sensors. Input impedance is greater than 5K ohms.
0–10 volt accuracy is ±2% of span, without user calibration. Figure 8 shows the wiring diagram.
0–10 Vdc sensors require a VoltageInputPoint.
Figure 8 0–10 Vdc wiring.
4–20 mA
The inputs support self-powered 4–20 mA sensors. Input accuracy is ±2% of span, without user calibration. Figure 9
shows the wiring diagram, which requires a 499 ohm resistor wired across the input terminals.
4–20 mA sensors also require the VoltageInputPoint.
Shielded, Twisted Cable,
61m (200 ft) maximum
Shield
10K Thermistor
U1 0V U2 U3 0V U4
Stud in enclosure
Cut and tape shield wire back
at Thermistor.
+
–
Shielded, Twisted Cable,
61m (200 ft) maximum
Shield
0—10Vdc Sensor
Range: 0—10 Vdc
Input Impedance > 5K ohms
0—10
Vdc
(self-powered sensor)
U1 0V U2 U3 0V U4
Stud in enclosure
Use point: VoltageInputPoint
Conversion: Linear
Cut and tape shield
wire back at sensor.

Remote IO-R-34 Module Mounting and Wiring Guide
August 2, 2017
Wiring Details
Inputs
12
Figure 9 4 to 20 mA wiring.
Caution When using an externally powered 4–20 mA sensor, be sure to de-energize its power supply before
making or changing any wiring connections to the IO-R-34 module. This is in addition to removing power
from the IO-R-34 module.
It is important to not apply external power to the UI inputs without the 499 ohm resistor in place.
Otherwise, even a momentary application of power (say, 24Vdc) to the UI terminals without the resistor
may damage circuitry on the IO-R-34. Only after completing all input wiring should you restore power
to such external power supplies.
Binary Input
The universal inputs support both pulse contacts and normal dry (equipment status) contacts.
•Pulse contacts may have a change-of-state (COS) frequency of up to 20 Hz with a 50% duty cycle.
Note: Minimum dwell time must be > 25ms.
(Contacts must remain open at least 25ms and be closed at least 25ms.)
•Standard dry contacts must have a 1 Hz. (or less) COS frequency, with minimum dwell time > 500ms.
(Contacts must remain open at least 500ms and be closed at least 500ms.)
Both types of dry contacts support 3.3 Vdc open circuits or 330 µA short-circuit current.
Figure 10 shows the wiring diagram.
For a pulse contact, use the CounterInputPoint in the station database.
For other dry contacts, use the BooleanInputPoint.
i
+
–
Shielded, Twisted Cable,
61m (200 ft) maximum Stud in enclosure
Shield
4—20 mA Sensor
Range: 0—20 mA
(self-powered sensor)
499 Ohm resistor
(supplied with unit)
U1 0V U2 U3 0V U4
Use point: VoltageInputPoint
Conversion: 500 Ohm Shunt
secondary conversion: Linear
Cut and tape shield
wire back at sensor.

Wiring Details
Outputs
Remote IO-R-34 Module Mounting and Wiring Guide
August 2, 2017
13
Figure 10 Binary input wiring.
Outputs
The IO-R-34 has ten (10) digital relay outputs and eight (8) 0–10 volt analog outputs.
Relay Outputs
Each relay output is rated at 24 Vac or Vdc at 0.5A. Relay outputs have MOV (metal oxide varistor) suppressors to
support inductive-type loads such as heavy-duty relay coils.
Warning Relays are not rated for AC mains (line level) powered loads (instead, 24V maximum).
Never use a controller's power transformer to power I/O loads. Using the controller’s
transformer introduces potentially damaging switching transients into the unit.
Use a RelayOutputWritable in the station for each output. Figure 11 shows an example wiring diagram.
Shielded, Twisted Cable,
61m (200 ft) maximum Stud in enclosure
Shield
Pulse
Use point: CounterInputPoint
Range: Up to 20 Hz,
50% Duty Cycle
Minimum dwell time
> 25ms
Shielded, Twisted Cable,
61m (200 ft) maximum Stud in enclosure
Shield
Dry Contacts
Use point: BooleanInputPoint
U1 0V U2 U3 0V U4
U1 0V U2 U3 0V U4
Cut and tape shield
wire back at sensor.
Cut and tape shield
wire back at sensor.

Remote IO-R-34 Module Mounting and Wiring Guide
August 2, 2017
NrioModule (Software) Representation
NrioModule (Software) Representation
14
Figure 11 Relay output wiring diagram.
Note that 15-position DO connector plug has 5 common terminals “C” (1–2, 3–4, 5–6, 7–8, 9–10), which are isolated
from each other. This can be useful when powering loads from different 24Vac sources.
A yellow LED status indicator for each relay (D1—D10) is located on the board (Figure 3 on page 7), and also visible
through the cover. Under normal operation, each digital status LED indicates activity as follows:
•Off—relay open / no current flows.
•On—relay closed / load current flows.
Therefore, an On status indicates that the load is powered.
Analog Outputs
Analog outputs (AO) are referenced by the terminals labeled AOnand 0V (ground). Each AO can supply a maximum
of 4 mA over the entire 0 to 10Vdc range. The minimum input impedance of a device controlled by an AO must be
greater than 2500 ohms. Typical wiring for an AO is shown in Figure 12.
For each AO, use a VoltageOutputWritable in the station database.
Figure 12 Analog output wiring diagram.
NrioModule (Software) Representation
In the EC-Net station interface to the EC-BOS and IO-R-34 module, the module’s I/O is modeled in the station’s
NrioNetwork (copied from the nrio palette), under a child Nrio34Module “device level” component. This
Nrio34Module has a default name of “io34_n”.
Loads
2
1
3
4
24Vac
Transformer
(see previous
Warning)
AC
Mains
(Line) 24Vac
D1 D4
D2 D3
24Vdc Power
Supply 24Vdc
+
–
Use point: RelayOutputWritable
OR
3C4
1C2
Shielded, Twisted Cable,
61m (200 ft) maximum
Input (+)
Common (–)
0—10Vdc device
Input impedance
is greater than
2500 ohms
AO1 0V AO2 AO3 0V AO4
Use point: VoltageOutputWritable

Power up and Initial Checkout
Power up and Initial Checkout
Remote IO-R-34 Module Mounting and Wiring Guide
August 2, 2017
15
Note After a remote I/O module is discovered and added to the station under this NrioNetwork (each one as an
Nrio34Module), the serial status LEDs for the EC-BOS’s RS-485 port continually flash, reflecting polling
activity. At this time, the “STATUS” LED on that IO-R-34 module lights solid green.
Blinking of a remote I/O module’s status LED indicates that the unit is NOT Online.
Each input or output used requires a special Remote Input/Output (Nrio) point to be added in the station database. These
components act as the station interface to the physical I/O points. The Nrio points you need for each input or output type
are noted in previous wiring sections in boldface. For Nrio software details, see the Nrio Driver Guide.
Power up and Initial Checkout
Step 1 Apply power to the IO-R-34.
The IO-R-34 module’s board status LED (Figure 3 on page 7)will initially be blinking.
Step 2 Using EC-Net Pro, open a station connection to the EC-BOS-8. If not already present, add an
NrioNetwork component to the station’s Drivers Container.
Step 3 Configure the NrioNetwork’s “Port Name” property to match the EC-BOS-8’s RS-485 port COM
assignment (for example, COM2), and set its “Trunk” property to a unique number Nrio-wide (i.e., 2).
Step 4 From the NrioNetwork’s Nrio Device Manager view, perform a Discover.
Each discovered remote I/O module will be listed in the top “Discovered” pane in the view, with each
IO-R-34 appearing as an “Io34” device type.
Note To associate a discovered device to a specific IO-R-34, issue a right-click “Wink Device” action—this
cycles a relay output on that IO-R-34 several times, which you can hear or see if nearby. This action
is available both before and after a discovered device is added to the station.
Step 5 Add each discovered IO-R-34 to the station, renaming to reflect its actual location (see Note above). Each
IO module is represented by an Nrio34Module component.
Step 6 Verify that each IO-R-34 module’s board status LED is now lit solid green.
Note If an Nrio34Module is selected in the Nrio Device Manager view, and the Upgrade Firmware button is
active, it is recommended that you upgrade its firmware. After selecting this, do not interrupt power to
the IO-R-34 and EC-BOS, or the communications between them, until the firmware upgrade job
finishes. Typically, this takes less than 2 minutes, with job completion signaled in the EC-Net Pro view.
Step 7 You can now discover, add, and configure IO points under each Nrio34Module’s Points device extension.
For more details about Nrio components, refer to the NRIO Driver Guide, also available in EC-Net Pro
online Help (doc Nrio).

Remote IO-R-34 Module Mounting and Wiring Guide
August 2, 2017
Replacement Parts
Replacement Parts
16
Replacement Parts
Servicing the IO-R-34 may call for replacement parts. There are two categories of parts:
•Standard Replacement Parts
•New Replacement Units
Standard Replacement Parts
Standard replacement parts are listed in Ta ble 2 and can be ordered from stock without restriction. Standard
replacement parts cannot be returned for credit and should be disposed of in an appropriate manner.
New Replacement Units
To replace a faulty unit, order and install a new IO-R-34 accessory module. If the faulty IO-R-34 is still in warranty,
you can receive credit by returning it. Be sure to contact the vendor for a return material authorization (RMA) number
before shipping an item for return credit. See “Returning a Defective Unit,” page 17, for details.
Note Before ordering a new IO-R-34, it is strongly recommended that you contact your normal technical support
resource to eliminate the possibility of a software issue or mis-configuration problem.
Replacing an IO-R-34
Caution Before handling circuit boards, discharge any accumulated static by touching the nearby earth
grounding point. For details, see the “Static Discharge Precautions” section on page 4.
To replace the IO-R-34 module in the field, proceed as follows:
Procedure 2 Replacing an IO-R-34 accessory module.
Step 1 Using the appropriate EC-Net software tool, back up the EC-BOS’s configuration to your PC.
Step 2 Remove power to the IO-R-34. The unit should power down automatically.
Note If any I/O points have voltage, turn the devices off or disconnect power to them.
Step 3 Note positions of all I/O wiring going to the IO-R-34. If necessary, label connectors to avoid mis-connection
later (after module is replaced). The software that runs on the controller expects the terminal positions to
be the same in the replacement IO-R-34, in order to collect data from or to control the attached devices.
Step 4 Unplug all connectors from the IO-R-34, including all I/O connectors, power, and earth ground wire.
Step 5 Remove any screws or DIN rail clips securing the module, removing it from its mounting. See Figure 1 on
page 6 for details on removal from (and mounting onto) DIN rail.
Table 2 Parts Listing for IO-R-34
Part Number Item Description
32327282-001 Replacement Unit IO-R-34 option module, model #14022
10600 Connector plug 15 position screw terminal, 180 deg.
10599 Connector plug 12 position screw terminal, 180 deg.
10598 Connector plug 2 position screw terminal, 180 deg.
32330828 Connector plug 5 position screw terminal, 180 deg.
32327803 Accessory Kit,
IO-R-34
– One (1) grounding wire, with quick-disconnect 0.187" female connector.
– Sixteen (16) 499-ohm resistors,+/-1%, 0.6W.

Replacement Parts
Returning a Defective Unit
Remote IO-R-34 Module Mounting and Wiring Guide
August 2, 2017
17
Step 6 Mount the replacement IO-R-34 as it was previously, using the same DIN rail location and/or screws.
Step 7 Reconnect the earth ground wire to the module’s grounding lug.
Step 8 Reconnect all I/O connectors to the IO-R-34.
Step 9 If any of your I/O points have voltage, turn the devices back on, or reconnect power to them.
Step 10 Restore power to the IO-R-34, allowing at least 4 minutes before possibility of power interruption.
For related details, see “Power up and Initial Checkout”, including the Warning on page 13.
Step 11 For more details, see the Nrio Driver Guide and EC-BOS-8 Install and Startup Guide.
Returning a Defective Unit
Note If the defective unit is under warranty, please follow return instructions provided in this section.
If the unit is out of warranty, please discard it, observing all national and local recycling regulations.
•Do not return an out-of-warranty IO-R-34.
Prior to returning the unit, contact your vendor to obtain a return materials authorization (RMA) number and other
instructions.
Please provide:
•Product model
•Nature of the defect
•PO number to secure the RMA

Remote IO-R-34 Module Mounting and Wiring Guide
August 2, 2017 EC-Net4 IO-R-34_IG_11_EN
Replacement Parts
Returning a Defective Unit
18
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