Contemporary Control Systems BAScontrol20 Installation Guide

BAScontrol20

20-point BACnet/IP Sedona Field Controller

INSTALLATION GUIDE

INTRODUCTION

The BAScontrol20 (BASC20) is a 20-point field controller with a direct
connection to an IP/Ethernet network. Ideally suited for structured wiring
systems, the BASC20 is BACnet/IP compliant with a B-ASC device
profile. Having a resident Sedona Virtual Machine (SVM), the unit is freely
programmable using tools such as Niagara Workbench or Sedona Workbench.
For remote Ethernet I/O applications, the unit can be configured with minimal
effort using a standard web browser.

The BASC20 provides a convenient mix of universal inputs, binary inputs and
outputs as well as analog outputs. Models exist for both triac and relay binary
outputs. The unit is ideal for unitary control or for expanding I/O points in the
field via an Ethernet connection:

Versatile Control Device — remote I/O, router and controller

 Direct connection to an IP/Ethernet network
 Compliant with BACnet/IP and B-ASC device profile
 Powered by Sedona Framework™ Controller
 Configurable with a standard web browser
 Real-Time clock with super-cap backup

Flexible Input/Output — 20 points of I/O

 Eight configurable universal inputs
 Thermistor, analog voltage, binary input, pulse inputs (4 channels)
 Four binary inputs
 Four analog voltage outputs
 Four relay or triac output models

The BASC20 provides the ultimate in flexibility. It can be used for expansion
I/O at remote locations where an Ethernet connection exists. It can operate as a
function block programmable controller with its resident Sedona Framework
Virtual Machine. The BASC20 can operate as remote I/O for BACnet/IP and as
a Sedona Framework controller at the same time. A 10/100 Mbps Ethernet port
allows connection to IP networks and popular building automation protocols
such as BACnet/IP, and Sedona SOX. Twenty points can be configured through
resident web pages. The unit provides eight universal I/O points and four binary
outputs — plus an additional four binary inputs and four analog outputs.

SPECIFICATIONS

Universal Inputs (Points UI1 – UI8) (web page configurable)

Analog inputs: 0–10 VDC or 0–20 mA (with external resistor)
(Input impedance 1 MΩ on voltage)

Temperature input: Type II 10 kΩ thermistors: –10º to +190 ºF (–23.3º to +87.8ºC)
Type III 10 kΩ thermistors: –15º to +200 ºF (–26.1º to +93.3ºC)

Binary input: Excitation current 0.5 mA. Open circuit voltage 12 VDC.
Sensing threshold 3 VDC (low) and 7 VDC (high).

Pulse input : (Points UI1–UI4) Adjustable high and low thresholds.
0–10 VDC for active output devices.
0–12 VDC for passive devices (configured for internal pull-up resistor)
40 Hz maximum input frequency with 50% duty cycle.

Binary Inputs (Points BI1 – BI4)

Binary input: Excitation current 1.2 mA. Open circuit voltage 12 VDC.

Sensing threshold 3 VDC (low) and 7 VDC (high).
Response time 20 ms.

Analog Outputs (Points AO1 – AO4)

Analog output: 0–10 VDC. 12-bit resolution. 4 mA maximum.

Binary Outputs (Points BO1 – BO4) (Class 2 circuits only)

Model BASC-20R: Normally open relay contacts. 30 VAC/VDC 2 A.
Model BASC-20T: Isolated triac. 30 VAC 0.5 A.

Regulatory Compliance

CE Mark, CFR 47, Part 15 Class A, RoHS
UL 508, C22.2 No. 142-M1987

Functional Ethernet

Compliance: IEEE 802.3
Protocols supported: BACnet/IP, SOX
Data rate: 10 Mbps, 100 Mbps
Physical layer: 10BASE-T, 100BASE-TX
Cable length: 100 m (max)
Port connector: Shielded RJ-45
LED: Green = Link established
Flash = Link activity

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Figure 1 — RJ-45 Jack

IP Reset Button

Electrical (± 10%) (Intended for use with Class 2 circuits.)

Input (DC or AC) DC AC

Voltage (V, ±10%): 24 V 24 V
Power: 4 W 6 VA

Frequency: N/A 47–63 Hz

Environmental/Mechanical

Operating temperature: 0°C to +60°C

Storage temperature: –40°C to +85°C
Relative humidity: 10% to 95%, non-condensing
Mounting: Panel-mount
Protection: IP30
Weight: 0.6 lbs. (.27 kg)

LEDs Ethernet: Green

I/O Points: Green

RJ-45Pin Assignments (MDI)

1 TD+ 3 RD+
2 TD– 6 RD–

(All other pins are unconnected.)

Dimensions (All dimensions are in mm.)

Figure 2 — BASC20 Dimensional Drawing

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Function

Signalling &
Data Rate

Minimum Required
Cable

Maximum
Segment Distance

Ethernet

10BASE-T
10 Mbps

Category 3 UTP

100 m (328 ft)

Ethernet

100BASE-TX
100 Mbps

Category 5 UTP

100 m (328 ft)
I/O

Unspecified

18 AWG

Unspecified

INSTALLATION

The BASC20 is intended to be panel-mounted in an industrial enclosure or wiring
closet with screws (not provided). See Figure 2 for mechanical details.

Cabling Considerations

When attaching cables to the BASC20, Table 1 should be considered.

Table 1 — Cabling Considerations

NOTE: If using shielded cable, connect to chassis at only one point. Wire size
may be dictated by electrical codes for the area where the equipment is being
installed. Consult local regulations.

Observe in Table 1 that 10BASE-T segments can successfully use Category 3, 4
or 5 cable — however, 100BASE-TX segments must use no less than Category 5
cable. Category 5e cable is recommended as the minimum for new installations.

The Ethernet port employs Auto-MDIX technology so that either crossover or
straight-through cables can be used to connect to the network.

Real-Time Clock

The BASC20 contains a real-time clock (RTC) which can be configured via a
standard web browser or it can be configured to get its time from an Network
Time Protocol (NTP) server. The RTC is backed up via a super-cap which can
provide up to one week of backup for the RTC during a power loss. The RTC is
also used to provide non-volatile storage for the unit's pulse counts and its
virtual Sedona components.

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Powering

The unit requires a source of 24 VDC or VAC via a two-pin removable
keyed connector.

NOTE: This device is intended for use with Class 2 circuits.

The recommended size for power conductors is 16–18 AWG (solid or
stranded). Ground is directly connected to zero volts. Input connections
are reverse-polarity protected.

Limited Power Sources

The BASC20 should be powered by a limited power source complying
with the requirements of the National Electric Code (NEC) article 725 or
other international codes meeting the same intent of limiting the amount
of power delivered by the source. Under NEC article 725, a Class 2
circuit is that portion of the wiring system between the load side of a
Class 2 power source and the connected equipment. For AC or DC
voltages up to 30 volts, the power rating of a Class 2 power source is
limited to 100 VA. The transformer or power supply complying with the
Class 2 rating must carry a corresponding listing from a regulatory
agency such as Underwriters Laboratories (UL).

Indicator Lights
Power: If applied power is adequate, this LED glows solid green.
Ethernet: This LED glows if a valid link exists to an operating Ethernet

device. It flashes to indicate activity.
I/O: Each of these LEDs glows green when the associated I/O point is in

an active condition.

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Field Connections

When attaching devices, observe proper cabling using Figure 3 as a guide.

Figure 3 — Sample Wiring Diagram

Attach devices to the BASC20 so that the more positive wire goes to the
A terminal. Considerations in making field connections for various types
of input and output devices are discussed in the following pages.

Universal Inputs UI1–UI8

Universal inputs are configured via a web browser. Consult the BASC20 User
Manual for details. It can be downloaded from the BAScontrol20 support page at:

www.ccontrols.com/support/bascontrol20.htm

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Figure 4 — Analog Input Connections

Figure 5 —
Thermistor

Connections

Universal Input — Configured for Analog Input

A Universal Input can measure voltage in the range of 0–10 VDC or current in
the range of 0–20 mA with the use of an external resistor. Transmitters that
produce an elevated “zero” such as 2–10 VDC or 4–20 mA can be measured
as well. With a web browser, access the Main Screen, click the title link of
any channel UI1–UI8. Then set the Channel Type to Analog Input and the
Units to either AMPERES or VOLTS. The input impedance is 1 MΩ.

To measure voltage, connect the more
positive wire to point A. The output of
a three-wire device (such as the actuator
in Figure 4) references its power
supply common — which must match
the BASC20 common. In this
situation, you only need to attach the
device output to input point A on the
BASC20 — otherwise, tie the negative
wire to point C.

When measuring current (UI2 in
Figure 4), provide a 500 Ω resistor
between points A and C to measure a 0–20 mA signal with full resolution.

Universal Input — Configured for Temperature Input

Built-in calibration curves are provided for 10 kΩ Type II or Type III
thermistors. With a web browser, access the Main Screen, click the title

link of any channel UI1–UI8. Then set the Channel Type to either
Therm 10KT2 or Therm 10KT3 and the Units to either
DEGREES_CELSIUS or DEGREES_FAHRENHEIT.

As shown in Figure 5, connect the thermistor to
points A and C. Polarity is not an issue. For
temperature averaging, connect multiple devices of
the same in a series-parallel combination so that the

nominal resistance remains at 10 kΩ. The effective

range of temperature measurement for Type II 10
kΩ thermistors is from –10º to +190 ºF (–23.3º to
+87.8ºC). For Type III 10 kΩ thermistors it is from
–15º to +200 ºF (–26.1º to +93.3ºC). The channel
LED will glow when a thermistor is properly connected.

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Figure 6 — Contact
Closure Connection

Universal Input — Configured for Binary Input

To sense the action of a push-button or relay, the
contacts must have no applied energy, and be rated
for low-voltage, low-current switching. The
BASC20 provides the energy to be sensed. With a
web browser, access the Main Screen, click the title
link of any channel UI1–UI8. Set the Channel Type
to Binary Input and the Units to NO_UNITS. As
shown in Figure 6, connect the contacts between
points A and C. For common mechanical contacts, polarity is not an issue.
The open-circuit voltage is 12 VDC and the short-circuit current is 0.5 mA.

For solid-state switch sensing, we recommend that an attached solid-state
device have an opto-isolated open-collector NPN transistor output stage
with a collector-emitter output voltage (Vce) of at least 30 V. Output
sinking current should be greater than 5 mA. The collector-emitter
saturation voltage should be less than 0.2 V when sinking 2 mA. The
emitter must be connected to point C and the collector to point A (the
more positive point). The BASC20 sets the low-threshold to 3 V and the
high-threshold to 7 V. When a contact is made or the solid-state switch
is on (resulting in a saturated output), the voltage at point A is close to
zero volts. The corresponding LED for that channel will be on. If the
contact is opened or the solid-state switch is turned off, the voltage at
point C quickly rises towards 12 V. Once the voltage passes the 7 V
high-threshold, the “off” state is sensed. To return to the “on” state, this
voltage must fall below 3 V. The four-volt difference is called hysteresis.
There is no need to add an external pull-up resistor when using a contact
closure input.

Contact closure inputs are sampled every 10 ms and for a change of state
to be recognized, the input state must be stable for two consecutive
samples. Therefore, contact closure response is 20 ms.

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Figure 7 — Pulse Input Connection

Universal Input — Configured for Pulse Input

Assuming a 50% duty cycle, a pulse rate up to 40 Hz can be measured on
channels UI1–UI4. With a web browser, access the Main Screen, click the
title link of the selected channel. Set the Channel Type to Pulse Input and
the desired accumulated Units to NO_UNITS or the proper units for the
accumulated counts. The device can have an active output or passive
output. Data is an accumulated pulse count.

When using a passive output pulse device, enable Pull Up Resistor in the
web page configuration for the channel. When using pulse outputs with an
active output, disable Pull Up Resistor.

The Pulse Input voltage low-threshold and high-threshold are adjustable.
The difference in the two thresholds is the hysteresis. Sinusoidal signals
can be detected if within the threshold
limits. Any substantial swing within
this range can be detected. The input
impedance using Pulse Input is 1 MΩ

if the pull-up is not enabled. Connect

the output of the pulse device to point
A and the common to BASC20
common as shown in Figure 7.

The pulse output could be sinusoidal
with no DC offset so the BASC20
could experience both positive and
negative excursions of the signal.
The BASC20 can only detect positive voltages so the negative
excursions will be ignored. It is still possible to detect the input signal
by only sensing the positive excursions.

When interfacing to a pulse device that has an opto-isolated open-collector
output, the internal pull-up resistor must be enabled on the device by selecting

this option in the web page. In Figure 7, a three-phase wattmeter has three

opto-isolated open-collector outputs, each requiring the internal pull-up
resistor to be enabled.

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Figure 8 — Analog Output Connections

Figure 9 — Binary Output

Connections

Analog Outputs AO1–AO4

Voltage in the range of 0–10 VDC (with up to 4 mA of current) can be
outputted. No configuration is necessary except to input the BACnet
properties. Configure the BACnet properties using a web page. The
output voltage is applied to point A with respect to common.

Figure 8 illustrates connections

to a three-wire damper
actuator. The damper requires
a 0–10 V command signal
which can easily be
accomplished by the BASC20.

Binary Outputs BO1–BO4

The BASC20 can provide four relay (BASC-20R) or four triac outputs
(BASC-20T). Only configuration of BACnet properties is required. The
maximum voltage for relay units is 30 VAC/VDC and the maximum
current through the relay contacts circuit is 2A. For triac models, the
maximum voltage is 30 VAC and the maximum current is 0.5 A.
Violating these limits could damage the
BASC20 and void the warranty.

Relay outputs can be used as contact
closures for other low-voltage AC or DC
devices, but triac outputs can only be used
for low-voltage AC devices. It is common
for the BASC20 binary outputs to enable
the coil of interposing relays which can
carry larger currents and support
switching higher voltages.

Figure 9 illustrates typical connections for binary outputs. Notice that an
external power supply is necessary to power loads.

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Figure 10 — Binary

Input Connection

Binary Inputs BI1–BI4

To sense the action of a push-button or relay, the
contacts must have no applied energy, and be rated
for low-voltage, low-current switching. The
BASC20 provides the energy to be sensed.
Configuration is only required to set the BACnet
properties. As shown in Figure 10, connect the
contacts between points A and C. For common
mechanical contacts, polarity is not an issue. The
open-circuit voltage is 12 VDC and the short-circuit current is 1.2 mA.

For solid-state switch sensing, we recommend that an attached solid-state
device have an opto-isolated open-collector NPN transistor output stage
with a collector-emitter output voltage (Vce) of at least 30 V. Output
sinking current should be greater than 5 mA. The collector-emitter
saturation voltage should be less than 0.2 V when sinking 2 mA. The
emitter must be connected to point C and the collector to point A (the
more positive point). The BASC20 sets the low-threshold to 3 V and the
high-threshold to 7 V. When a contact is made or the solid-state switch
is on (resulting in a saturated output), the voltage at point A is close to
zero volts. The corresponding LED for that channel will be on. If the
contact is opened or the solid-state switch is turned off, the voltage at
point C quickly rises towards 12 V. Once the voltage passes the 7 V
high-threshold, the “off” state is sensed. To return to the “on” state, this
voltage must fall below 3 V. The four-volt difference is called hysteresis.
There is no need to add an external pull-up resistor when using a contact
closure input.

Contact closure inputs are sampled every 10 ms and for a change of state
to be recognized, the input state must be stable for two consecutive
samples. Therefore, contact closure response is 20 ms.

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Figure 12 — Steps for Changing the IP Address of the PC Used for Setup

Webpage Configuration

The BASC20 contains a web server — browser accessible from a PC on the
local network. Often the BASC20 default IP address (192.168.92.68) and
subnet mask (255.255.255.0) must be changed for use in the local facility.

Figure 11 shows the setup for doing this. Attach the unit to a PC with an
Ethernet connection and a standard web browser. Initially, the PC should
have its IP address temporarily modified as shown in Figure 12 using a
Windows® 7 example. The PC has an IP address of 192.168.92.69, but the
final quad of the address could be any value from 3 to 254 — except for 68
used by the BASC20. After the IP address of your PC has been set to the
same subnet as the BASC20, a browser in your PC can access the
BASC20 at its default IP address.

Figure 11 — Setup for Initial

IP Address Configuration

Secure Login and Reset (Recovery Mode)

To reset the unit to its default IP values and login credentials, press the
reset switch (see Figure 2 for switch location) for over 4 seconds. This
forces the recovery mode confirmed by alternate flashing of UI1-UI4 and
AO1-AO4 channel LEDs. This action restores the default settings for the
user ID (admin), password (admin), IP address (192.168.92.68) and
subnet mask (255.255.255.0). Access the main web page, make any
changes to the IP configuration and login credentials, and then click
Restart Controller to exit recovery mode.

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NEED MORE HELP INSTALLING THIS PRODUCT?

Additional information can be found in the technical documentation available on
our web site at www.ccontrols.com. When contacting one of our offices, just
ask for Technical Support.

WARRANTY

Contemporary Controls (CC) warrants its new product to the original purchaser for
two years from the product shipping date. Product returned to CC for repair is
warranted for one year from the date that the repaired product is shipped back to the
purchaser or for the remainder of the original warranty period, whichever is longer.

If a CC product fails to operate in compliance with its specification during the
warranty period, CC will, at its option, repair or replace the product at no charge.
The customer is, however, responsible for shipping the product; CC assumes no
responsibility for the product until it is received.

CC’s limited warranty covers products only as delivered and does not cover repair of
products that have been damaged by abuse, accident, disaster, misuse, or incorrect
installation. User modification may void the warranty if the product is damaged by the
modification, in which case this warranty does not cover repair or replacement.

This warranty in no way warrants suitability of the product for any specific
application. IN NO EVENT WILL CC BE LIABLE FOR ANY DAMAGES
INCLUDING LOST PROFITS, LOST SAVINGS, OR OTHER INCIDENTAL OR
CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY
TO USE THE PRODUCT EVEN IF CC HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES, OR FOR ANY CLAIM BY ANY PARTY
OTHER THAN THE PURCHASER.

THE ABOVE WARRANTY IS IN LIEU OF ANY AND ALL OTHER
WARRANTIES, EXPRESSED OR IMPLIED OR STATUTORY, INCLUDING
THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR PARTICULAR
PURPOSE OR USE, TITLE AND NONINFRINGEMENT.

RETURNING PRODUCTS FOR REPAIR

Return the product to the location where it was purchased by following the
instructions at the URL below:

www.ccontrols.com/rma.htm

DECLARATION OF CONFORMITY

Information about regulatory compliance can be found at the URL below:

www.ccontrols.com/compliance.htm

January 2014

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