Chromalox 3101 User manual

3101 3101
High/Low Limit Controller High/Low Limit Controller
Operator’s Manual
0037-75253
Operator’s Manual
0037-75253
Issue Date
November 2007
Issue Date
November 2007

Chromalox 3101 Operator's Manual i
1 Getting Started................................................................. 1
2 Installation ........................................................................ 3
3 Operation ......................................................................... 1
4 Controller Setup PAGEs ................................................. 23
5 Limit Control Operation.................................................. 29
6 Alarms ............................................................................ 35
7 Digital Event Input .......................................................... 41
8 Analog Output Option .................................................... 43
9 Digital Communications ................................................. 45
10 Calibration ...................................................................... 51
11 Specifications................................................................. 57
12 Troubleshooting.............................................................. 61
13 Warranty and Return ...................................................... 63
Appendices
I PAGE/MENU Tables ....................................................... 65
Menu Index
Index ....................................................................................... 73
Table of Contents
Sections
Section Topic Page

ii Chromalox 3101 Operator's Manual
Illustrations
Fig. Topic Page
1.1 Model Identification................................................................ 2
2.1 Sensor Selection Dip Switch Settings ................................... 3
2.2 Mounting Dimensions ............................................................ 5
2.3 Mounting Diagram.................................................................. 5
2.4 Wiring Terminal Identification ................................................. 7
2.5 Thermocouple Connections................................................... 8
2.6 3-Wire RTD Connections ....................................................... 9
2.7 2-Wire Connections ............................................................... 9
2.8 Current Input Wiring (Self-powered) ...................................... 9
2.9 Voltage Input Wiring (Self-powered) .................................... 10
2.10 Current Input Wiring (Loop-powered by controller) ............. 10
2.11 Momentary Contact Pushbutton.......................................... 10
2.12 Relay Output Connections................................................... 11
2.13 Alarm #1 Relay Output......................................................... 12
2.14 Alarm #2 Output................................................................... 12
2.15 100-240 Vac Instrument Power Conn. (3101-11**0) ............ 13
3.1 Front Panel Identification ..................................................... 16
3.2 PAGE/MENU Setup Structure.............................................. 17
3.3 Sample of PAGE/MENU Table ............................................. 19
3.4 Security Levels and PAGE/MENU Contents ........................ 20
3.5 Security Codes and View/Adjust Levels .............................. 21

Chromalox 3101 Operator's Manual iii
Illustrations
Figure Topic Page
5.1 Process Variable Profile—High Limit Control....................... 31
6.1 Low Alarm Inhibit ................................................................. 36
8.1 Analog Output Signal ........................................................... 43
8.2 Process Output Wiring......................................................... 44
9.1 RS422/RS485 Communications Switches........................... 46
9.2 RS232 Wiring Connections.................................................. 46
9.3 RS232 Connector Pin Designations..................................... 47
9.4 RS485 Wiring Connections (4-wire) ..................................... 47
9.5 RS422 Connector Pin Designations..................................... 48
9.6 RS485 Wiring Connections (2-wire) ..................................... 48
9.7 RS485 Connector Pin Designations..................................... 48

iv Chromalox 3101 Operator's Manual

Section 1
Getting Started
The Chromalox 3101 is a compact 1/4 DIN program-
mable high/low limit controller with two independent
alarms. While designed to be low-cost, the 3101 has
many features of high-end limit controllers:
• Universal Sensor Input
• Switching Power Supply allows universal AC
voltage input (100 to 230 Vac)
• U. L. and U. L. (Canadian) Listed
as an Overtemperature Controller
• FM High/Low Limit Controller
• High Impact Plastic Bezel and Housing
• One high/low limit output and two independent
alarm outputs
• Time over/under setpoint display
• Max/Min process variable display
• One programmable Digital Input
• Isolated Serial Communications (optional)
• Analog Process Output (optional)
• Security protection
• 32°F to 149°F Operating Temperature
• ±0.2% Accuracy Specification
• VIEW DATA key on front panel for a quick ac-
cess to Display Page
• Power Down Recovery feature retains limit and
alarm status when power is restored

Model Temperature Controller
3101 Microprocessor-based 1/4 DIN Programmable High/Low Limit Controller.
Universal Sensor Input accepts Thermocouple, RTD, Current or Voltage Inputs.
One Digital Input and One Alarm Output.
Figure 1.1 Model Identification
Model Identification
Before installation, please identify your controller model number. The
model number is written on the tag on the side of the housing.
Code Limit Output #1
1Relay—Form C Contact, 5A @ 120 or 230 Vac
1Relay—Form C Contact, 5A @ 120 or 230 Vac
Code Alarm #1 Output
Code Analog Process Output Option
0None
1Field selectable 4-20mA or 1-5 Vdc
Code Digital Comm. and Alarm #2 Options
0None
1RS422/485 Digital Communications and
Alarm #2 Relay—Form C contact, 5A @
120 or 230 Vac
2RS232 Digital Communications and
Alarm #2 Relay—Form C Contact, 5A @
120 or 230 Vac
Code Power Supply
0100 - 230 Vac
3101 - 1 1 1 2 0 Typical Model Number

Chromalox 3101 Operator's Manual 3
Section 2
Installation
On receipt of your 3101 controller, immediately
make note of any visible damage to the ship-
ment packaging and record this damage on the
shipping documents. Unpack the controller and
carefully inspect it for obvious damage due to
shipment. If any damage has occurred, YOU must
file a claim with the transporter, as they will not
accept a claim from the shipper.
If the controller will not be immediately installed
and placed into operation, it should be stored in
a cool, dry environment in its original protective
packaging until time for installation and operation.
Temperature extremes and excessive moisture
can damage the instrument.
Inspection
and
Unpacking
Switch
Settings
The 3101 has up to seven (7) hardware switches
located on the bottom of the controller. The
switches are accessible through cutouts in the
controller housing and do not require that you
remove the controller from its housing to access
the switches.
Figure 2.1 identifies the switches. Instructions for
switch settings are given in the corresponding
sections of the manual.
Figure 2.1
Sensor Selection
Dip Switch
Settings
Controller Bot-
tom Surface
Switches #1 and #2
Digital Communications
RS422/RS485
Switches #1, #2 and #3
Sensor Input
Switch #4
(not used)
Switch #5
Analog Output
Signal

4 Chromalox 3101 Operator's Manual
Sensor
Selection
Switches
Sensor selection requires that you:
1. Set the sensor switches for the correct sen-
sor type.
2. Program the input sensor type in sensor
selection setup on the INPT Page (see page
36).
It is much easier to set the sensor input switch-
es before you mount and wire the controller.
To set the sensor switches:
1. Locate the sensor switches — #1, #2 and
#3 — on the bottom of the controller, as
shown in Figure 2.1 on the previous page.
2. Place the switches in the appropriate Up or
Down position for your input type:
Switch #
Input Type 1 2 3
T/C Up Up Up
RTD Down Up Up
4-20mA Up Down Down
1-5 Vdc Up Up Down
Figure 2.2, on the following page, shows the
mounting dimensions for the controller:
1. Cut out the square “panel cutout” mounting
hole and install the unit as shown in Figure
2.3.
2. Place the controller through the square
panel cutout and replace the mounting clip.
3. Tighten the mounting clip screw (do not
overtighten) to secure the controller firmly
against the mounting surface.
Mounting

Chromalox 3101 Operator's Manual 5
4.0
(102)
3.5
(90)
3.6
(92)
3.6
(92)
3.8
(96)
3.8
(96)
Figure 2.2 Mounting Dimensions
0.8
(19)
Panel Cutout
Mounting Hole
Figure 2.3 Mounting Diagram
Mounting Tab
Mounting Clip
Panel Cutout
Measurements are shown in inches. Millimeters are shown in parentheses.