Automated Logic U253 Owner's manual

Automated Logic Corporation •1150 Roberts Blvd. •Kennesaw, GA 30144 • 770/429-3000 •770/429-3001 Fax •
www.automatedlogic.com • Copyright 2002 Automated Logic Corporation. All rights reserved. Automated Logic, the
Automated Logic logo, SuperVision, Eikon, WebCTRL, Alert, and InterOp are registered trademarks of Automated Logic
Corporation. BACnet®is a registered trademark of ASHRAE. All other brand and product names are trademarked by
their respective companies.
Technical Instructions
U253
Using the U253 2
Specifications 2
Job Start-Up 3
Job Start-Up for WebCTRL 3
Job Start-Up for SuperVision 3
Start-Up Checklist 4
Mounting 4
Addressing 4
Power Wiring 4
Communications Wiring 5
Communicating Through the LogiStat Port 6
Input Wiring 7
Using the LogiStat 7
Digital Output Wiring 8
Analog Output Wiring 8
Using Flow Sensors 8
Writing GFBs for the U253 9
Point Identifiers 10
LEDs 10
Production Date 11

Revised 8/14/02 • U253 2 © 2002 Automated Logic Corporation
Using the U253
The U253 is part of a family of control
modules designed specifically for heat pump
and fan coil applications. The U253 has:
• two digital outputs
• two LogiStat inputs
• three general purpose inputs
• three analog outputs
The U253 communicates with other U-Line
modules on the Unet using BACnet MS/TP
protocol over EIA-485 twisted pair wire. The
U253 module communicates with the CMnet
through Unet Interface modules (UNIs). The
UNI must use one of the following module
drivers to communicate with the U253:
• For WebCTRL systems, the DRV_UNI16
or DRV_UNI32 module driver
• For SuperVision systems, the U1M,
U3M, U5M, or UNM module driver
If communication with the UNI is lost, the
U253 can be programmed with a backup
default algorithm to maintain space
temperature. Refer to the appropriate UNI
module driver technical instruction for
instructions on setting up this default
algorithm.
The U253 module is programmed with a
Graphic Function Block (GFB), which is
transferred into the UNI. Depending on the
software you are using, GFBs written for U-
Line modules must be created in Eikon for
WebCTRL or Eikon using the Zone GFB
option; refer to the Eikon for WebCTRL User’s
Guide or the Eikon User’s Guide for more
information.
NOTE To operate this module based on a
schedule, the UNI must be networked with a
gateway module.
U253 modules have been designed to meet
low-end, high-volume terminal control
applications. As a result, time-critical
applications (such as short time delays and
trend intervals of less than one minute)
should not be used with these modules. ALC
recommends that all time delay functions and
trend intervals in U253 FBs be set to at least
one minute.
CAUTION If the equipment is used in a
manner not specified by the manufacturer,
the protection provided by the equipment
may be impaired.
Specifications
Power 24VAC ±10%, 10VA, 50-60Hz.
Inputs three inputs configurable for
thermistor, 0 to 5VDC, or dry contact; two
LogiStat inputs.
Input Resolution 10 bit.
Digital Outputs two relay outputs, rated
at 1A.
Analog Outputs three analog outputs, 0-
10VDC, 5mA maximum drive capability.
Output Resolution 8 bit.
Communication 9600 bps or 38.4 kbps,
automatically detected (determined by
UNI module).
Environmental Operating Range 0 to
130 °F (-17.8 to 54.4 °C); 5 to 95% relative
humidity, non-condensing.
Status Indication Visual (LED) indicators.
Memory 60KB Flash EPROM and 2KB of
RAM, 8KB non-volatile storage for
default algorithm and configuration data.
Protection Metal oxide Varistor (power,
analog inputs, and output relay).
Transient voltage suppressor (analog
output). Zener and opto isolation
protection (communications).
Listed by PAZX (UL 916).

Revised 8/14/02 • U253 3 © 2002 Automated Logic Corporation
Job Start-Up
WebCTRL and SuperVision require different
module drivers and Eikon software. The
appropriate module drivers, Eikon for
WebCTRL or Eikon 3.0a or later, and a sample
U-Line GFB can be downloaded from
Automated Logic Corporation’s web site
(http://www.automatedlogic.com). You can
also order a copy of Eikon for WebCTRL or
Eikon on CD through Order Administration.
Job Start-Up for WebCTRL
For a WebCTRL system, you need these items
to properly start up and support U-cards:
• UNI/16 with the DRV_UNI16 module
driver, or UNI/32 with the DRV_UNI32
module driver
• Eikon for WebCTRL
• U-Line Zone GFBs
Job Start-Up for SuperVision
For a SuperVision system, you need these
items to properly start up and support U-
cards:
• UNI/16 with the U1M module driver,
UNI/30 with the U3M module driver,
UNI/32 with the UNM module driver, or
UNI/59 with the U5M module driver
• Eikon 3.0a or later
• U-Line Zone GFBs
If you have InterOp Tools version 3.0 you
must install Eikon 3.0a or the InterOp Tools
Figure 1. U253 Layout and Dimensions
Power
OnesTens
Gnd
Temp
Sw
LS5v
LogiStat
Tx
Enclosed Energy
88FO
E143900
TYPE: 000553
Management Equipment
R
Run
n/c
Use Copper
Conductors
Only
Class 2
7.0VA
50-60 Hz
24 Vac
0.29A
Gnd
AO-1
DO-2
DO-1
BUSS
Analog
Outputs
Power for D.O.s
Gnd
IN-3
Gnd
IN-2
Gnd
IN-1
Error
Analog
Inputs
Flow 1
+ 10V
Gnd
Flow 2
Rx
Flow Sensor
Source Only
Single Class 2
24V Max, 1A Max
Outputs
MSTP
BACnet TM
AO-2
Gnd
AO-3
Gnd
This product was designed to be
mounted inside the building envelope.
Warranty voided if mounted outside.
CAUTION:
On Off
U253
Gnd
24 Vac
Unet +
Unet -
U-com
56890
7
23
41
56890
7
23
41
0.2"
0.5 cm
5.7"
14.5 cm
0.2"
0.5 cm
2.6"
6.6 cm
5.1"
13 cm
5.2"
13.2 cm

Revised 8/14/02 • U253 4 © 2002 Automated Logic Corporation
Service Pack 1. There is no cost for Eikon
3.0a.
Start-Up Checklist
1. Use the appropriate version of Eikon for
WebCTRL or Eikon 3.0a or later to create
GFBs for U-Line modules. Be sure to
enable the Zone GFB option in Eikon for
WebCTRL or Eikon. Refer to “Writing GFBs
for the U253” on page 9 for more
information.
2. Use the appropriate module driver. (See
“Job Start-Up” on page 3.)
3. Connect the U-Line modules to the Unet
and the UNI.
4. Transfer the U-Line modules’ GFBs to the
UNI.
Mounting
Screw the U253 into an enclosed panel using
the mounting holes provided on the cover
plate. Be sure to leave about 2 inches (5
centimeters) on each side for wiring.
Addressing
The U253 has dual rotary switches for
assigning the board address. The top switch
corresponds to the tens digit and the bottom
switch corresponds to the ones digit (see
Figure 2). The U253’s address must be the
same as its FB number in the UNI.
For example, if the module’s FB number is
nine, set the tens switch to zero and the ones
switch to nine.
The U253’s BACnet Device Instance number
can be assigned by the UNI or individually
specified. This number is shown on the UNI
Properties page in WebCTRL or on the UNI
Status page in SuperVision.
Power Wiring
The Unet follows the same specifications as a
legacy CMnet. Refer to the Technical
Handbook for details on legacy CMnets. Also
refer to the Technical Handbook for detailed
information on daisy-chain, star, and hybrid
wiring configurations.
There is a special wire available that contains
a pair of 14AWG wires for power and a pair of
22AWG wires for communication. This wire is
available from:
Magnum Cable Corporation
Cleveland, OH 44110-0500
[phone]
Product number A3U-LINE
CAUTION The U253 modules are Class 2
devices (less than 30VAC, 100VA maximum).
Take appropriate isolation measures when
mounting a U253 module in a control panel
where Non-Class 2 devices (120V and
greater) or wiring are present.
You can power several modules from the
same transformer by daisy-chaining the
power from one U-Line module to the next.
You must maintain the same polarity.
Do not exceed 100VA or 500 feet (152.4
meters) total of 14AWG wire. The maximum
number of modules on one transformer can
be figured by dividing the VA of the
transformer by the sum of the VA of the
module plus the VA of any accessories. For
example, if the module’s power is 9VA,
accessories per module equal 6VA, and the
transformer is 100VA, you could have up to 6
modules on the network. See the formula in
Figure 3 and the example in Figure 4 on page
5.
Figure 2. Dual Rotary Address Switches

Revised 8/14/02 • U253 5 © 2002 Automated Logic Corporation
The U253 has an operating range of 21.6VAC
to 26.4VAC. Whenever possible, connect and
verify power and communications to all
modules before connecting any inputs or
outputs.
1. Remove the U253’s power jumper or place
it in the off position. This prevents the
module from being powered up before
verifying correct voltage.
2. Make sure the 24VAC power source is off.
3. Connect the power wires to the module’s
power terminals labeled 24VAC and Gnd.
4. Turn the 24VAC power source on.
5. Make sure that 24VAC is present at the
module’s power input terminals.
6. Set the module’s address. Refer to
“Addressing” on page 4 for details.
7. Replace the module’s power jumper or
place it in the on position.
When the module turns on, the Run LED
turns on and begins blinking. The Run
LED blinks once every two seconds until
communication is established, then blinks
twice per second when operating
normally. Refer to “LEDs” on page 10 for
more information.
Communications Wiring
There is a special wire available that contains
a pair of 14AWG wires for power and a pair of
22AWG wires for communication. See “Power
Wiring” on page 4 for details.
Note that the communication wire is
unshielded. Shielded cable is not required for
the Unet.
In most circumstances, you should have a
PROT485 within 250 feet of any U-line
module on the Unet for surge protection.
However, depending on the frequency of
electrical surges in your area, the 250-foot
recommendation may vary. For example, if
you have frequent electrical storms in your
area, you may want to use more PROT485s; if
you have few electrical storms, you may want
to use fewer PROT485s. If the entire Unet is
less than 250 feet, place at least one PROT485
at the opposite end of the network from the
UNI. For details about the PROT485, refer to
the ARC156 CMnet Wiring Technical
Instructions. Make sure that all modules and
the PROT485 use the same polarity
throughout the Unet. You must use a repeater
after every 32 modules or 3,000 feet.
The Unet baud rate is determined by the UNI
module and is automatically detected by the
U253. You can set or change the Unet baud
rate to 9600 bps or 38.4 kbps on the UNI. The
U253 begins using the new baud rate after ten
seconds.
If the module is not communicating with the
UNI, the module’s color is as follows:
• For WebCTRL systems, the module’s
color is purple.
• For SuperVision systems, the module’s
color is coral.
1. Remove the module's power jumper or
place it in the off position.
2. Check the Unet communication wiring for
shorts, grounds, or opens.
Figure 3. Figuring Maximum Number of Modules
Figure 4. Example of Figuring Maximum Number
of Modules
VA (transformer)
VA (module) +VA(accessories)
Maximum #
of modules
(rounded down)
=
100VA
9VA + 6VA =6.67 or
6 modules maximum

Revised 8/14/02 • U253 6 © 2002 Automated Logic Corporation
3. Connect the Unet communication wires to
the Unet Port (see Figure 1 on page 3).
Replace the module's power jumper. You
must transfer memory to the UNI before the
U253 is recognized.
Communicating Through the
LogiStat Port
You can connect your workstation to the Unet
and the ARC156 or Legacy CMnet network
segment using a LogiStat sensor. While
connected, the UNI does not allow a restart
(zap), a memory transfer, or any other action
that would break the passthrough
connection.
The LogiStat Port connection does not apply
in WebCTRL.
To communicate through the LogiStat port,
the U253 must:
• be connected to a UNI on an ARC156
network segment
• use the appropriate module driver
For SuperVision systems, use a version
6.01d or later of the U1M, U3M, U5M, or
UNM module driver
Communication speed is fixed at 1200 baud.
1. Connect the computer’s serial port to the
EIA-232 port of the APT using a standard
straight-through cable.
2. Set the APT’s Mode Select switch to TTL
(see Figure 6 on page 7).
If you are using a LogiStat Plus without
supplemental power to the APT, make
sure the LED on the Logistat Plus is on
indicating that it can provide power to the
APT. If the LED is not on, you can provide
power to the APT using the Supplemental
Power +5V dc connection (see Figure 6 on
page 7) and the special power cable to a
laptop keyboard jack, or an external
supply, such as a 5V dc transformer.
3. Define the connection type.
In SuperVision v3.0, define the connection
as Access Port.
In SuperVision v2.6, define the connection
as Direct Connect.
4. Set the baud rate at 1200 bps.
5. Attach the LogiStat Adaptor cable (ALC
part number 235022) to the APT cable.
Use this assembly to connect the APT’s
Access Port to the LogiStat’s LogiPort.
While connected, the LogiStat Pro
displays “LP” indicating that the LogiStat
Pro will not respond to input from the
keypad.
NOTE When the LogiStat Adaptor cable
is inserted into the LogiPort, the U253 can
no longer read the LogiStat inputs. The
U253 continues to use the last valid
temperature and setpoint adjust readings
obtained before the cable was inserted
into the LogiPort. If the occupancy
override timer was active when the
connection was made, it continues to
count down, but no new values can be
obtained for these inputs until the
LogiStat Adaptor cable is removed. See
the Eikon for WebCTRL Microblock
Reference Guide or the Eikon Microblock
Reference Guide for more information
about the LogiStat microblock.
Figure 5. Using the PROT485 on the Unet
Unfused:
Use for inside
wiring
EARTH GROUND
PROT485
EARTH GROUND
REV 0
Automated Logic, Corp
Shared connection:
Fused or unfused
-
+
+
-
To UNI To U modules

Revised 8/14/02 • U253 7 © 2002 Automated Logic Corporation
6. Disconnect the LogiStat Adaptor cable
from the LogiStat’s LogiPort when
finished to allow the U253 to read inputs
from the LogiStat.
Input Wiring
The U253 inputs support the types of signals
listed below. The LogiStat, LogiStat Plus, and
LogiStat Pro sensors are supported through
the module’s LogiStat port. Refer to Table 1
for information about wire length, gauge, and
shielding. Make sure the U253’s power is off
before wiring any inputs or outputs.
• Thermistor: Precon type 2 (10kohm at
77°F). Input voltages should range
between 0.489V and 3.825V for
thermistors.
• 0 to 5VDC: When using 0 to 5VDC
signals, remove the pull up jumpers of
the U253. The pull up jumpers are
located behind the input port. You must
remove the cover to access the pull up
jumpers. The output impedance of a 0
to 5VDC source must not exceed
10kohms. The input impedance of the
U253 is approximately 1Mohm.
• Dry Contact: A 5VDC wetting voltage is
used to detect contact position. This
results in a 0.5mA maximum sense
current when the contacts are closed.
No pulse accumulation inputs are allowed in
U253 FBs, except for the override button on
the LogiStat.
Using the LogiStat
Use Figure 7 and Figure 8 to wire a LogiStat,
LogiStat Plus, or LogiStat Pro to the U253.
Automated Logic Corporation recommends a
specific wire to connect the U253 to the
LogiStat. This 22AWG solid copper wire is
available from Magnum Cable Corporation,
product number A3LOGISTAT.
Figure 6. Using the LogiPort
Gnd
24Vac
Gnd
Tem p
Sw
LS 5v
Unet+
Unet-
U-com
On Off
BACnet
U253
9
Rx
61
2- Tx out
3- Rx in
5- Gnd
1,6,8- +10V or floating Tx +5V
APT
5
Exec. 4 relay
Isolate Network
ModeSelect
TTL 485
ACCESS
PORT
LogiStat
Port
Supplemental
Power
+5V dc
LogiStat Adaptor Cable
LogiStat
Access
Port
Mode Select
Switch
EIA-232
Port
Exec 4 Relay
Switch
Table 1. Input Wiring Restrictions
Input
Maximum
Length
Minimum
Gauge Shielding
Universal 50 feet
15 meters
24AWG shielded and
grounded to
module’s “-”
or Gnd
terminal
LogiStat
Sensors
100 feet
30 meters
22AWG unshielded
Figure 7. Connecting the LogiStat to the U253
Strip 1/4 inch off the ends of the wires before
connecting.
LogiStat
1234
4
3
2
1
LogiStat
Umodule
LS5v
Sw
Temp
Gnd
Gnd
Tx
Rx
Pwr

Revised 8/14/02 • U253 8 © 2002 Automated Logic Corporation
Refer to the section “Writing GFBs for the
U253” on page 9 for more information about
using a LogiStat sensor.
Digital Output Wiring
The U253 has two digital outputs that can be
connected to a maximum of 24 Volts AC/DC
(see Figure 9). Each output is a dry contact
(rated at 1A maximum) that is configured as
normally open.
Be sure the module’s power is off before
connecting any inputs or outputs.
To verify each output’s operation, lock the
output to a known condition using the
Function Block’s Properties page in WebCTRL
or the Parameter page in SuperVision, then
make sure the equipment operates as
specified.
Analog Output Wiring
The U253 has three analog outputs that
support voltage devices from 0 to 10VDC (see
Figure 10). The device being controlled must
have a minimum of 2000 Ohms resistance
measured from its input to ground and must
Be sure the U253’s power is off before wiring
any inputs or outputs. Connect the output
wiring to the screw terminals on the module.
To verify each output’s operation, lock the
output to a known condition on the Function
Block’s Properties page in WebCTRL or the
Parameter page in SuperVision, then make
sure the equipment operates as specified.
Using Flow Sensors
The U253 controls air flow in the zone using:
• a USF (single) air flow sensor and an
actuator connected to two digital
outputs
If you use a flow sensor with the U253, use
the Airflow microblock in the U253’s GFB.
To connect the sensor, make sure the U253’s
power is off first. Attach the total or high
pressure line from the VAV box to the
module’s HI side, and attach the static
pressure line to the module’s LO side.
Connect the USF to the U253 as shown in
Figure 11 on page 9.
To ensure an accurate reading from the flow
sensor, use the Airflow microblock in the
module’s GFB. You must calibrate this
microblock using the instructions on the FB’s
Properties page in WebCTRL or Parameter
page in SuperVision. Refer to the Eikon for
WebCTRL Microblock Reference Guide or the
Eikon Microblock Reference Guide for more
information.
Figure 8. Flip Lever Wiring
Figure 9. Digital Output Wiring
2. Press black
tab down to
connect wire
1. Insert wire
into opening
DO
DO
BUSS
DO-1
DO-2
24VAC
Gnd
+
Figure 10. Analog Output Wiring
0to10V
+
-
Gnd
AO-1

Revised 8/14/02 • U253 9 © 2002 Automated Logic Corporation
Writing GFBs for the U253
Depending on whether you are using a
WebCTRL or a SuperVision system, you must
use either Eikon for WebCTRL or Eikon 3.0a
or later to create GFBs for the U253. Be sure
to enable the Zone GFB option in Eikon when
making the GFB.
A sample U-Line GFB is available at
Automated Logic Corporation’s web site
(http://www.automatedlogic.com). Use this
sample as a guideline for creating your own
GFBs. A default algorithm can be loaded into
the U-card to provide stand-alone control
functions if communications between the U-
card and the UNI are disrupted. Refer to the
appropriate UNI module driver technical
instruction for instructions on setting up this
default algorithm. The U253’s Graphic
Function Block is stored in the UNI module,
which must use one of the following module
drivers:
• For WebCTRL systems, the DRV_UNI16
or DRV_UNI32 module driver.
• For SuperVision systems, the U1M,
U3M, UNM, or U5M module driver.
When using a LogiStat sensor with the U253,
include a LogiStat microblock and a Zone
Control microblock in the module’s GFB. The
LogiStat microblock supports the LogiStat,
LogiStat Plus, and LogiStat Pro sensors.
If you are using WebCTRL, you do not need to
enter point identifiers for this microblock in
Eikon for WebCTRL or WebCTRL. If you are
using SuperVision, you do not need to enter
channel numbers for this microblock in Eikon
or SuperVision. For more information, refer to
the Eikon for WebCTRL Microblock Reference
Guide or the Eikon Microblock Reference
Guide.
You do not need to use BACnet microblocks
when writing the GFB, unless you have a
BACview Keypad Display connected to the
Figure 11. Using the UDF
4"
10.2 cm
2.5"
6.4 cm
High
High
4321
STATIC
PRESSURE
TOTAL
PRESSURE
Flow #1
Flow #2
Low
Low
6"
15.2 cm
Umodule
Maximum Cable Length 4 ft.
Use 20 Gauge Wire
or ALC cable (part no. 235012)
NOTE: When making a sensor cable, disregard the
numbers imprinted on the plastic connector.

Revised 8/14/02 • U253 10 © 2002 Automated Logic Corporation
UNI. You must then use BACnet point
microblocks to access U253 points through
the keypad.
Point Identifiers
A point can be identified in WebCTRL by its
point number and point type; in SuperVision,
a point is identified by its channel number. On
both systems, expander number zero
represents I/O points on the U253.
Point Identifiers in WebCTRL
Enter the point identifiers in Eikon for
WebCTRL before the FB is made or on the FB’s
Properties page in WebCTRL. Set the type,
number, and minimum and maximum
present values for each point on the U253.
Select a physical point type from the Point
Type field and enter the number of the input
or output. If needed, enter an expander
number. To scale a linear signal type, enter
the appropriate minimum and maximum
present values on the microblock’s dialog
box.
If you are not using a LogiStat in a WebCTRL
system but would like to use the two inputs
that are available on the LogiStat port, assign
an address of 16 for the temperature input
and 17 for the setpoint input.
Channel Numbers in SuperVision
Refer to Table 2 and Table 3 for channel
numbers for each physical point on the U253.
The channel number, offset, and gain for each
point can be entered in Eikon before the
Function Block is made, or on the FB’s
Parameter page in SuperVision.
LEDs
The U253 modules have diagnostic LEDs to
assist troubleshooting.
Table 2. Digital Outputs
I/O Type Signal Type Channel Number
DO 1 Digital 11
DO 2 Digital 12
Table 3. Inputs
I/O Type Signal Type Channel Number Range Offset Gain
IN-1
Thermistor 31 -17° to 213° F
-27° to 100.6° C 0.00 0.00 15.88 15.69
Volts 31 0 to 5V † †
Digital 21
IN-2
Thermistor 32 -17° to 213° F
-27° to 100.6° C 0.00 0.00 15.88 15.69
Volts 32 0 to 5V † †
Digital 22
Sw
Thermistor A3 -17° to 213° F
-27° to 100.6° C 0.00 0.00 15.88 15.69
Digital B3
LogiStat ‡
Temp Thermistor A1 or
A2‡‡ 45° to 100° F 7.22° to 37.8° C 0.00 0.00 15.88 15.69
LogiStat ‡
Thermistor 33 -17° to 213° F
-27° to 100.6° C 0.00 0.00 15.88 15.69
IN-3 Volts 33 0 to 5V
Digital 23
Flow
input Flow (sensor units) ‡‡‡
† Use the Point Help feature of SuperVision for Windows v2.0 or later to
determine offset and gain for these types of inputs.
‡ Channel numbers for these inputs are set by the LogiStat microblock and do
not need to be manually entered in SuperVision or Eikon.
‡‡ A1 is 10-second averaged. A2 is not averaged.
‡‡‡ Channel numbers for these inputs are set by the Airflow Control
microblock and do not need to be manually entered in SuperVision or Eikon.
Table 4. Analog Outputs
Point Signal Type Channel Number Range Offset Gain
AO 1 Analog 41 0 to 10VDC 0.00 0.0625
AO 2 Analog 42 0 to 10VDC 0.00 0.0625
AO 3 Analog 43 0 to 10VDC 0.00 0.0625
Table 5. Run LED
Status Meaning
2 times per second Normal operation.
5 times per second Transferring firmware.
Once every 2 seconds Auto-detecting baud rate.

Revised 8/14/02 • U253 11 © 2002 Automated Logic Corporation
Power - On when the module is on.
Rx - On when the module receives data.
Tx - On when the module transmits data.
DO1 - On when digital output 1 is active.
DO2 - On when digital output 2 is active.
Production Date
To determine when a module was
manufactured, check the module status
report for the module in WebCTRL or
SuperVision. Refer to the appropriate user’s
guide for more information about the module
status report.
A sticker on the back of the module also
shows the date the module was
manufactured. The first three characters on
the sticker indicate the type of module. The
next two characters show the year and month
of manufacture. (The month digit is in
hexadecimal.)
Table 6. Error LED
Status Meaning
2 times per second Firmware error. Transfer
memory to the module to
correct.
Solid on Hardware failure.