Revised 8/14/02 • U141v+ 2 © 2002 Automated Logic Corporation
Using the U141 v +
The U141v+ is part of a family of control
modules designed specifically for VAV
terminal box applications using an improved
algorithm for local flow control. The U141v+
has:
• one digital output
• two LogiStat inputs
• two general purpose inputs
• one analog output
The U141v+ module also provides an
integrated flow sensor and Belimo LM-24
actuator and is designed to be mounted
directly on the VAV box damper shaft.
The U141v+ communicates with other U-Line
modules on the Unet using BACnet MS/TP
protocol over EIA-485 twisted pair wire. The
U141v+ module communicates with the
CMnet through Unet Interface modules
(UNIs). The UNI must use one of the following
module drivers to communicate with the
U141v+:
• 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
U141v+ 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 U141v+ 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.
U141v+ 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 U141v+ 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%, 7.5VA, 50-60Hz.
Motor
torque 35ft.lb., runtime 100 seconds.
Inputs
two inputs configurable for
thermistor, 0 to 5VDC, or dry contact; two
LogiStat inputs.
Input Resolution
10 bit.
Digital Outputs
one relay output, rated at
1A.
Analog Outputs
one analog output, 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.
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