Infinity
Infinity
TCX 850, TCX 851, TCX 852, TCX 853, TCX 855 Terminal Control Unit
The Infinity TCX 850 family of intelligent, programmable, stand-alone controllers provides costeffective Direct Digital Control of individual terminal units: VAV boxes, fan powered induction units,
unit ventilators, heat pumps, etc. The Infinet’s true peer-to-peer communications protocol provides
the Infinity TCX 850 with the ability to instantly communicate with an Infinity network controller such
F E A T U R E S
• Stand Alone DDC for System
Reliability
as the CX 9200, as well as the entire network of Andover Infinet field controllers. Up to 254 TCX 850s
• Peer-to-Peer Communications
can be networked with the Infinity CX family of controllers.
Provide Transparent Data
Transfer
COMMUNICATIONS
Communication to the Infinity TCX 850 is handled via the Infinet bus, a twisted pair, half duplex RS-485 interface.
Communication is accomplished with a token passing protocol which provides full transparent data transfer between all
• Plain English™ Language
Simplifies Programming
Infinity controllers on the network.
• Universal Inputs for Flexible
Control Configurations
INPUTS
Choose the TCX controller with the input configuration that matches your application. The TCX 850 has four full range
Universal inputs that accept voltage (0-5VDC), digital (on/off), counter signals (up to 4 Hz), or temperature signals plus a fifth
• Form A and Tri-State Outputs for
On/Off and Bidirectional Control
input which is an on-board air flow sensor. Three field adjustable potentiometers provide min/max and setpoint adjustments.
• On-Board Pressure Transducer
The TCX 851 comes without the on board airflow sensor for applications not requiring airflow measurement, such as heat
for Airflow Measurement
pumps and fan coils. It contains four Universal inputs but does not contain the three potentiometers.
• Expandable I/O Meets Additional
The TCX 852 contains two Universal inputs and the on-board airflow sensor for reduced I/O applications. It does not contain
Point Count Needs
the three potentiometers.
The TCX 853 is for dual-duct VAV applications. It contains two on-board airflow sensors and six Universal inputs. It does not
contain the three potentiometers.
The TCX 855 is identical to the TCX 850, with the exception that it contains a lower range (0-0.2” W.C.) airflow sensor to
meet lower air volume applications.
• Battery Backup for Ten Years
Accumulated Power Failure of
RAM Memory
In f i n i ty T C X 8 5 0 , 8 5 1 , 8 5 2 , 8 5 3 , 8 5 5 , Te r m i n a l C o n t r o l U n i t
OUTPUTS
The TCX 850, 851, 853, and 855 contain three Form A relay outputs for on/off or pulsed control of lighting, heat, and fan
units. One Tri-State output provides bidirectional control of dampers and valves. Optional analog output, pneumatic output,
and high voltage output modules are available.
The TCX 852 contains one Form A output and one Tri-State output for reduced I/O applications.
I/O
E X PA N S I O N
The TCX 850, 851, 853, and 855 contain the I/O expansion port for the addition of low-cost I/O modules directly on
the bottom of the controller. The family of modules includes the EMX 140 (2 pneumatic outputs), EMX 150 (2 analog
outputs), EMX 155 (2 digital outputs), and the EMX 160 (8 digital inputs). The EMX 170 Programmable Interface
provides a low-cost, wall-mount user interface and temperature sensor. It contains an 8-character LCD display and
six programmable pushbuttons that enable the user to view temperatures, adjust setpoints, and switch to occupied
mode.
PROGRAMMING
Every TCX 850 can be configured to meet the exact distributed control requirements of your application using
Andover Controls’ powerful Plain English™ programming language. Programs can be activated within individual TCX
850s or any network controller. Programs are entered into an TCX 850 using an SX 8000 workstation, the LSX 280
Lap-Top Service Tool, or network controller. The program is then stored in, and executed by, the TCX 850. The onboard lithium battery keeps programs backed up in the event of a power failure.
Programming multiple TCX 850s is inherently easy with Plain English™. A complete copy of one TCX 850’s programs
can be loaded directly into other TCX 850s without changing any point names or programs. The SX 8000 workstation
makes this process even easier with its unique drag-and-copy feature.
S O F T WA R E
C A PA B I L I T I E S
The dynamic memory of the TCX 850 can be allocated for any combination of Plain English control programs,
scheduling, alarming, and data logging. Our object-oriented language with intuitive keywords provides easy
operation and programming. In addition, Plain English’s pre-defined and customized functions and powerful math
capabilities reduce programming time for repetitive applications.
5.71"
145.0mm
5.0"
127.0mm
0.35
9.0mm
0.32"
8.0mm
GND
C
OUT1
NEU
NO
C
HOT
OUT2
F3
NO
C
OUT3
IN1
NO
C
RET
OUT4
IN2
+ON
RET
IN3
IN1
RET
RET
IN4
IN2
RET
RET
-ON
THESE
INPUTS
ON TCX853
ONLY
8.90"
228.0mm
8.20"
208.0mm
POTENTIOMETERS
IN5
MIN
INPUT 7
HIGH
PORT
INPUT 8
P1
P2
IN6
MAX
IN7
SP
LOW
PORT
SERVICE
PORT
RESET BUTTON
CPU
LED
INDICATORS
TD
F2
RD
+
F1
-
BATTERY
ES
EXPANSION
TCX 850 Dimensional Diagram
+
SPECIFICATIONS
ELECTRICAL
Power:
24VAC, 50/60 Hz
Power Consumption:
20VA
Overload Protection:
Fused with 2 amp pico fuse. MOV protected.
Software Real-Time Clock:
Synchronized through Infinet by CX or CMX Network Controller.
MECHANICAL
Operating Environment :
32° - 120°F (0°-50°C) 10-95% RH (non-condensing)
Size:
9"H x 5 3/4"W x 2 3/4"D (228H x 146W x 070D)mm
Weight:
3.5lbs (1.6 Kg)
Enclosure Type:
UL open class, IP 10
BATTERY
Battery Backup:
Replaceable non-rechargeable, lithium battery. Provides 10 years typical
accumulated power failure backup of RAM memory.
COMMUNICATIONS
Communications Interface:
Through Infinity CX or CMX Network Controller, or LSX 280 Service Tool.
Communications Speed:
1200 to 19.2k baud
Bus Length:
4,000 ft. (1,220m) standard for Infinet, InfiLink amplification module allows
extension to longer distances and is required after every group of 32 units on the
network.
Bus Media:
Infinet: twisted, shielded pair, approved low capacitance cable
Comm. Error Checking:
International Standard CRC 16
INPUTS/OUTPUTS
Inputs:
TCX 850
4 Universal inputs: Temperature -30°F to 230°F (-34°C to 110°C), Digital (on/off),
Counter (up to 4Hz at 50% duty cycle, 100 ms. minimum pulse width), Voltage (05.115 VDC)
1 airflow sensor (0 to 1” W.C.), 3 On-board adjustable potentiometers
TCX 851
4 Universal inputs, no airflow sensor, no potentiometers
TCX 852
2 Universal inputs, 1 airflow sensor, no potentiometers
TCX 853
6 Universal inputs, 2 airflow sensors, no potentiometers
TCX 855
4 Universal inputs, 1 airflow sensor (0 to 0.2” W.C.),
3 On-board adjustable potentiometers
S P E C I F I C A T I O N S (Cont'd)
INPUTS/OUTPUTS (Continued)
Input Voltage Range:
0-5.115 Volts DC
Input Impedance:
10K ohm to 5.120V
lnput Protection:
24VAC or 24 VDC indefinitely on any single channel, ± 1500 volt transients
Input Resolution:
5.0mV
Input Accuracy:
± 15 mV, 0-5.115V range
(± 1.0°F over range of 0 to 120°F)
(.55°C over -17.8°C to 48.9°C)
Airflow Input:
TCX 850
Range: 0 to 1 inch W.C.
Resolution: 0.005 inch of water @ 23°C
Accuracy: ± 5% of full scale or ± 0.05 inches water
TCX 855
Range: 0 to 0.2 inch W.C.
Outputs:
3 single pole single throw (SPST) Form A relays
(TCX 852 has 1 Form A output)
Digital Output Rating:
5A, 24VAC, ± 1500 volt transients
Digital Output Resolution:
0.1 sec. for pulse width modulation
Expansion Bus:
Interfaces to optional I/O Expansion Modules (TCX 850, 851, 853, 855 only)
Andover Controls Corporation
World Headquarters
300 Brickstone Square
Andover, Massachusetts
01810 USA
Tel: 508 470 0555
Fax: 508 470 0946
Power:
Three-position barrier strip
Andover Controls Europe
Smisby Road
Ashby-de-la-Zouch
Leicestershire LE6 5UG
Tel: 01530 417733
Fax: 01530 414225
Inputs:
Male Spade (.250)
Outputs:
Male Spade (.250)
Infinet Bus:
Three-position, removable terminal strip
1 Form K Tri-State relay
CONNECTIONS
GENERAL
Memory Size:
128K EPROM, 32K RAM, 128 Byte EEPROM
AGENCY LISTINGS
UL/CUL 916, 1076, 864 UUKL, FCC, CE
OPTIONS
•UL-864, UUKL Compliance
Andover Controls GmbH
Am Seerhein 8
D-78467 Konstanz
Germany
Tel: 07531 99370
Fax: 07531 993710
Andover Controls Asia
811 TsimSha Tsui Center, East Wing
66 Mody Road
TsimSha Tsui East, Kowloon
Hong Kong
Tel: 2739 6497
Fax: 2739 7350
Copyright 1997, Andover
Controls Corporation.
Data subject to change
without notice. Consult Andover Product
Installation Guides for exact installation
instructions and specifications.
#DS-TCX850-C
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