AMC VersaTox User manual

VersaTox
Sensor/Transmitter with
Optional Display & Relay
Output
INSTRUCTION MANUAL
IMPORTANT:
Please read these installation and operating instructions completely
and carefully before starting.
Filename: 3156405A.doc Copyright ©, October 2007, AMC
The Armstrong Monitoring Corporation
215 Colonnade Road South, Ottawa, Ontario, Canada K2E 7K3
Tel: [phone] • Fax: [phone] • Canada & U.S. Toll Free: 1-800-465-5777
E-mail: [email protected] • Internet: www.armstrongmonitoring.com

AMC-VersaTox Transmitter & Sensor
3
TABLE OF CONTENTS
Section Title Page
1WARRANTY.............................................................................................................5
1.1 LIABILITY........................................................................................................... 5
1.2 PRODUCT RETURN ......................................................................................... 5
1.3 MODIFICATIONS AND SUBSTITUTIONS......................................................... 5
2PRODUCT INFORMATION......................................................................................6
2.1 SENSOR/TRANSMITTER MODULE ................................................................. 6
2.2 FACTORY CALIBRATION ................................................................................. 6
3PRODUCT DESCRIPTION ......................................................................................7
4INSTALLATION .....................................................................................................11
4.1 LOCATION AND MOUNTING.......................................................................... 11
4.1.1 CONDUIT MOUNTING .........................................................................................11
4.1.2 120VAC POWER SUPPLY WITH BUZZER..........................................................12
4.1.3 DUCT MOUNTING (OPTIONAL) ..........................................................................12
4.2 WIRING............................................................................................................ 13
4.2.1 MONITOR AND POWER SUPPLY WIRING.........................................................13
4.2.1.1 DC Transmitter (1 board) to AMC Monitor .....................................................13
4.2.1.2 DC Transmitter (1 board) to BAS...................................................................14
4.2.1.3 DC Transmitter with Relay to AMC Monitor (Optional)...................................15
4.2.1.4 DC Transmitter with Relay to BAS with own Power Supply (Optional)..........16
4.2.1.5 DC Transmitter with Relay to BAS without own Power Supply (Optional).....16
4.2.1.6 DC Transmitter with relay to Power Supply only (Optional)...........................17
4.2.1.7 AC Transmitter with or without Relay to BAS (Optional)................................18
4.2.1.8 AC Transmitter with or without Relay to Transformer only (Optional)............18
4.2.1.9 120VAC Power Supply with Buzzer (Optional) ..............................................19
4.2.2 RELAY WIRING (OPTIONAL)...............................................................................20
4.3 CABLE SELECTION ........................................................................................ 21
4.3.1 2-WIRE 4-20 mA DC POWER LOOP ...................................................................21
4.3.2 3 AND 4 WIRE DC POWER ONLY (OPTIONAL) .................................................22
4.3.3 4 WIRE AC POWER ONLY (OPTIONAL) .............................................................22
5OPERATION AND CALIBRATION........................................................................23
5.1 OPERATION .................................................................................................... 23
5.1.1 TRANSMITTER.....................................................................................................23
5.1.2 RELAY, POWER BOARD (OPTIONAL)................................................................23
5.1.3 DISPLAY BOARD (OPTIONAL)............................................................................23
5.2 CALIBRATION ................................................................................................. 24
5.2.1 ON SITE CALIBRATION EQUIPMENT REQUIRED.............................................24
5.2.2 CALIBRATION PROCEDURE ..............................................................................24
5.3 ALARM RELAY TRIP POINT SETTING .......................................................... 26
6MAINTENANCE.....................................................................................................29
6.1 GENERAL........................................................................................................ 29
6.2 SCHEDULED CALIBRATION .......................................................................... 29
6.3 SENSOR/TRANSMITTER REPLACEMENT.................................................... 29

AMC-VersaTox Transmitter & Sensor
4

AMC-VersaTox Transmitter & Sensor
5
1WARRANTY
The AMC-VersaTox transmitter is warranted against defects in material and workmanship for a
period of two years from date of delivery. Maintenance items are not warranted. During the
warranty period, The Armstrong Monitoring Corporation will repair or replace components that
prove to be defective in the opinion of AMC. Any equipment deemed to be defective by the user
should be returned to The Armstrong Monitoring Corporation for evaluation (see product return
below). Site visits by Armstrong personnel, to evaluate/repair equipment, are not covered
by this warranty. AMC is not liable for auxiliary interfaced equipment, nor for consequential
damage. This warranty shall not apply to any product, which has been modified in any way,
which has been repaired by any other party other than a qualified technician or authorized AMC
representative, or when failure is due to misuse or conditions of use.
Note: extended warranty mail in calibration programs are available (please call 1-800-465-
5777).
1.1 LIABILITY
All AMC products must be installed and maintained according to instructions. Only qualified
personnel should install and maintain the equipment.
AMC shall have no liability arising from auxiliary interfaced equipment, for consequential
damage, or the installation and operation of this equipment. AMC shall have no liability for
labour or freight costs, or any other costs or charges in excess of the amount of the invoice for
the products.
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED,
AND SPECIFICALLY THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE. THERE ARE NO WARRANTIES THAT EXTEND BEYOND THE
DESCRIPTION ON THE FACE THEREOF.
WARNING
CHECK TO ASSURE THE WORKING AREA IS FREE FROM HAZARDS DURING
INSTALLATION OR WHEN PERFORMING MAINTENANCE, AND USE PROPER
PRECAUTIONS.
1.2 PRODUCT RETURN
All products returned for warranty or service should be shipped by prepaid freight and will be
accepted only with RMA or repair number issued by AMC. All products returned to the client will
be shipped by freight collect.
1.3 MODIFICATIONS AND SUBSTITUTIONS
Due to an ongoing development program, AMC reserves the right to substitute components and
change specifications at any time without incurring any obligations.

AMC-VersaTox Transmitter & Sensor
6
2PRODUCT INFORMATION
2.1 SENSOR/TRANSMITTER MODULE
Sensor/transmitter unit order number. ………...
Sensor/transmitter serial number...…………….
Sensor order number...…………………….……
Sensor serial number……………………………
Power Supply Requirement…………………….. 2 Wire 12 to 24 VDC @ 20 mA □
3 or 4 Wire 12 to 24 VDC/AC @ 90 mA □
Sensor Warranty…………………………………
Operating Temperature ………………………… -20° to 50° C
0° to 40° C (120VAC Plug-in Power Supply)
Operating Pressure …………………………….. 0.9 to 1.1 atm
Relative Humidity ……………………………….. 15 to 85% RH, non-condensing
Signal Linearity…………………………………... Linear to the concentration of gas
Relay Contacts…………………………………... SPST 2A @ 30VDC resistive
2.2 FACTORY CALIBRATION
Gas Type………………………………….….…...
Zero Gas, at 4 mA Signal…………….…………
Gas Concentration at 20 mA Signal……………
Calibration Adapter Part Number………………
Note:
All Armstrong Monitoring systems must be installed and maintained according to
instructions to assure proper operation. Only qualified technicians should install and
maintain the equipment. For re-calibration extended warranty program information
please call 1-800-465-5777.

7
3PRODUCT DESCRIPTION
The AMC-VersaTox sensor/transmitter unit is designed to provide continuous, reliable
surveillance of surrounding air for the target gas listed in the Factory Settings (Section 2.2).
This unit is powered by either AC or DC power source and provides a 4-20 mA, variable current
signal, which is proportional to the gas concentration detected. Optional gas concentration
digital display is available as well as a built-in alarm relay contacts. An optional 120VAC plug in
power supply is also available with a relay controlled buzzer. Each sensor/transmitter unit is
factory calibrated, and is ready for field installation and operation.
Each sensor module features alarm indicators, adjustment trimmers and connection terminal
blocks, as listed and described below.
Overview:
1. HOUSING: ABS plastic
2. TRANSMITTER BOARD: 4-20 mA transmitter with integral sensor
3. RELAY, POWER BOARD
(OPTIONAL):
Optional, Relay contact and/or isolated power supply; AC or
DC
4. DISPLAY BOARD
(OPTIONAL):
Optional, Digital display output
5. 120VAC POWER SUPPLY
WITH BUZZER (OPTIONAL):
Optional, 120VAC plug in power supply with relay controlled
buzzer
1. HOUSING BOARD
3. RELAY, POWER
2. TRANSMITTER
BOARD
AMC VersaTox
1-800-465-5777
www.armstrongmonitoring.com
3156501A
100 100
4. DISPLAY BOARD
5. 120VAC POWER SUPPLY
WITH BUZZER
Figure 3-1 AMC-VersaTox Feature Overview

8
TRANSMITTER BOARD:
6. GAS SENSOR: Electrochemical cell, factory calibrated
7. SPAN ADJUST TRIMMER: Span signal output adjustment
8. ZERO ADJUST TRIMMER: Zero signal output adjustment
9. COMMON TEST POINT: Reference point to measure signal
10. SIGNAL TEST POINT: Measurement point for the output signal from the sensor
11. CAL JACK: Used during calibration to connect Remote Calibration Lead
12. 2-WIRE 4-20mA TERMINAL
BLOCK: (2-WIRE VERSION
ONLY)
Connection point for wiring to the monitor, 2-wire transmitter
only
COMPONENT SIDE
11. CAL JACK TERMINAL BLOCK
12. 2-WIRE 4-20mA
TEST POINT
SENSOR SIDE
TRIMMER TEST POINT
9. COMMON
10. SIGNAL
7. SPAN ADJUST
8. ZERO ADJUST
TRIMMER
GND
J4
TP14
TB1
5V
TP13
TP12
TP11
COM SIG
SNS2
ZERO
5V
SPAN
CRS
C
SR
SNS1
J1
VR5
VR4
SNS6 GND
SIG COM
SRCCOM
Pos
Neg
6. GAS SENSOR
+
-
Figure 3-2 AMC-VersaTox Feature Transmitter Board
RELAY, POWER BOARD (OPTIONAL):
13. POWER TERMINAL BLOCK: Connection point for wiring to the monitoring device and/or
power source, AC or DC
14. SIGNAL TEST POINT: Measurement point for the output signal of transmitter board
15. GROUND TEST POINT: Reference point to measure signal and alarm
16. ALARM TEST POINT: Measurement point for setting the alarm relay
17. ALARM ADJUST TRIMMER: Alarm relay set point adjustment
18. ALARM RELAY TERMINAL
BLOCK:
Connection point for wiring relay contacts

9
19. ALARM RELAY SELECTOR: Allows selection between NO and NC alarm relay contacts
20. ALARM RELAY: Relay that is activated when the alarm set point has been
achieved
TB1
D1
AC-IN 1
SIG
D2
ALRM
TB2
TP5
TP1
TP2 TP3
NC
SIG OUT
TP4
ALRMPWR
GND
ALARM
NO
RELAY
V+
+5V
AC-IN 2
GND
ALARM ADJ.
19. ALARM
RELAY
SELECTOR
20. ALARM
RELAY
TEST POINT 16. ALARM
TEST POINT
14. SIGNAL
TEST POINT
ADJUST
TRIMMER
17. ALARM
TERMINAL
BLOCK
13. POWER RELAY
TERMINAL
BLOCK
18. ALARM
15. GROUND
Figure 3-3 AMC-VersaTox Feature Relay, Power Board
DISPLAY (OPTIONAL):
21. LCD DISPLAY: Gas concentration 3 digit display
21. LCD DISPLAY
100
Figure 3-4 AMC-VersaTox Feature Display Board

10
120VAC POWER SUPPLY WITH BUZZER (OPTIONAL):
22. 120VAC PLUG IN ADAPTER: Plug in power supply with 120VAC primary and low voltage
DC secondary
23. BUZZER: Piezo buzzer controlled by the alarm relay
24. JACK: Connects the plug in power supply to the AMC-VersaTox
AMC VersaTox
1-800-465-5777
www.armstrongmonitoring.com
3156501A
100 100
23. BUZZER
24. JACK
22. 120VAC PLUG IN ADAPTER
Figure 3-5 AMC-VersaTox Feature 120VAC Power Supply with Buzzer

11
4INSTALLATION
The installation of the AMC-VersaTox is very important as the operational quality is a direct
result of the quality of the installation. The following sections provide guidelines for installation;
location and mounting, wiring, and cable selection.
4.1 LOCATION AND MOUNTING
Mount the AMC-VersaTox sensor/transmitter on a solid, non-vibrating surface or structure in an
area where the ambient concentration of gas is not directly affected by the presence of clean air
supply, ventilation systems, or blockage by surrounding articles and sources of interference
gases. Please, refer to local codes for sensor/transmitter installation information. The installer is
required to provide any mounting hardware that may be required. The AMC-VersaTox
sensor/transmitter circuit board(s) with sensor is removable from the enclosure for ease of
installation.
Notes:
Mount enclosure with the sensor located as shown is Figure 4-1 and Figure 4-2. This
will ensure correct orientation. Where possible it is recommended to turn off supply
power before removing or replacing the transmitter or sensor.
4.1.1 CONDUIT MOUNTING
Wiring
TRANSMITTER
AMC VersaTox
1-800-465-5777
www.armstrongmonitoring.com
3156502A
2.13"
1/2" Ø CONDUIT
0.75"
SENSOR
3.80"
3.62"
Figure 4-1 Conduit Mounting

12
4.1.2 120VAC POWER SUPPLY WITH BUZZER
TRANSMITTER
AMC VersaTox
1-800-465-5777
www.armstrongmonitoring.com
3156502A
SENSOR
3.62"
4.125"
CABLE 6 FT
Figure 4-2 120VAC Power Supply with Buzzer Mounting
4.1.3 DUCT MOUNTING (OPTIONAL)
NOTE: The duct mount version is available for CO gas detection only.
The duct mount option is used to divert a portion of the duct airflow through the AMC-VersaTox.
The difference between the total pressure in the duct and outside the duct propels the sample
stream. The duct mount option can only be used in positive pressure ducts and is designed to
be directly mounted to the outside of the duct. The sampling tube is attached to the AMC-
VersaTox housing and inserted into the duct. The duct mount is assembled assuming the duct
air flow direction from left to right. If the opposite direction is required, remove the duct mounting
nut inside the housing, rotate the sampling tube 180º and reinstall the nut. Mount the
sensor/transmitter in a straight section of duct where the airflow is unrestricted and does not
interfere with any internal duct components. It is necessary to seal the conduit entry with
Ducseal or with another sealant.

13
Wiring
AMC VersaTox
1-800-465-5777
www.armstrongmonitoring.com
3156502A
AIR FLOW
3.62"
0.88"
1.81"
Ø0.437
DIRECTION
ADD DUCSEAL
AIR FLOW
DIRECTION
SIDE VIEW
BOTTOM VIEW
MUST FACE THE AIR FLOW
NOTE: THE OPEN SIDE OF THE TUBE
FIGURE 4-3 Duct Mounting Option
4.2 WIRING
The AMC-VersaTox has two main wiring systems: the monitor and power supply wiring and the
relay wiring systems.
A two conductor, shielded cable is recommended to transmit the 4-20mA signal from the AMC-
VersaTox sensor/transmitter to the monitor. In the 2-wire version, the same wire pair is used for
both signal and power due to the low power current loop design of the AMC-VersaTox. For best
signal transmission and maximum noise rejection, it is recommended to run the cable through
steel conduit (the cable shield must be chassis grounded at the monitor or power supply).
4.2.1 MONITOR AND POWER SUPPLY WIRING
The AMC-VersaTox has different power inputs and in turn has different power and signal wiring
schemes. The following sections describe each of these schemes.
4.2.1.1 DC Transmitter (1 board) to AMC Monitor
The simplest version of the AMC-VersaTox is the 2-wire transmitter with optional display. The
AMC-VersaTox sensor/transmitter should be connected to an AMC monitor, as shown in the
following figure, by a twisted pair shielded cable for the conduction of the 4-20 mA signal.

14
See the following connections going from the AMC-VersaTox to an AMC monitor:
AMC-VersaTox Terminal (+) -------- goes to ------- AMC Monitor Channel Terminal (+)
AMC-VersaTox Terminal (-) -------- goes to ------- AMC Monitor Channel Terminal (SIG)
For wiring selection, see section 4.3.1.
TRANSMITTER BOARD
WARNING
GND
J4
TP14
TB1
5V
TP13
TP12
TP11
COM SIG
+
-
NOTE: THIS WIRING SCHEME IS THE
SAME WITH THE DISPLAY OPTION
CABLE SHIELD MUST
NOT BE USED AS A
CONDUCTOR.
SIG
+
-
MONITOR
TRANSMITTER ( - ) TERMINAL
CONNECTS TO MONITOR
(SIG) TERMINAL.
12 TO 24 VDC
NOTE: PLUGGABLE CONNECTOR
THE AMC VersaTox HOUSING IS NOT SHOWN FOR CLARITY
FIGURE 4-4 DC Transmitter (1 board) to AMC Monitor
4.2.1.2 DC Transmitter (1 board) to BAS
The signal output of the AMC-VersaTox sensor/transmitter is a 4-20 mA DC current, therefore it
can be connected to BAS (building automation system) equipped with an analog-to-digital
converter if required.
In many cases a load resistor is required to convert the 4-20 mA current signal to a voltage
signal, as shown in the following figure. Please refer to your BAS for instructions on how to
connect a 4-20 mA loop transmitter.
For wiring selection, see section 4.3.1.

15
TRANSMITTER BOARD
WARNING
GND
J4
TP14
TB1
5V
TP13
TP12
TP11
COM SIG
+
-
NOTE: THIS WIRING SCHEME IS THE
SAME WITH THE DISPLAY OPTION
CABLE SHIELD MUST
NOT BE USED AS A
CONDUCTOR.
NOTE: PLUGGABLE CONNECTOR
THE AMC VersaTox HOUSING IS NOT SHOWN FOR CLARITY
FILTERED
12 - 24 VDC
SUPPLY
BUILDING
LOAD
RESISTANCE
FOR VOLTAGE
MEASUREMENT
-
+
-
+
SIGNAL
POWER
{
{
AUTOMATION
SYSTEM
4 - 20 mA
FIGURE 4-5 DC Transmitter (1 board) to BAS
4.2.1.3 DC Transmitter with Relay to AMC Monitor (Optional)
The AMC-VersaTox with relay, power board option requires a 3 wire connection when
interfacing to an AMC monitor. This additional board also has an optional relay, for relay wiring
see section 4.2.2. The AMC-VersaTox with optional display and relay should be connected as
shown in the following figure, by three twisted wires in a shielded cable.
For wiring selection, see section 4.3.2.
TB1
D1AC-IN 1
SIG
D2
ALRM
TB2
TP5
TP1
TP2 TP3
NC
SIG OUT
TP4
ALRM
PWR
GND
ALARM
NO
RELAY
V+
+5V
AC-IN 2
GND
ALARM ADJ.
RELAY, POWER BOARD
WARNING
NOTE: THIS WIRING SCHEME IS THE
SAME WITH THE DISPLAY OPTION
CABLE SHIELD MUST
NOT BE USED AS A
CONDUCTOR.
SIG
+
-
MONITOR
12 TO 24 VDC
NOTE: PLUGGABLE CONNECTOR
THE AMC VersaTox HOUSING IS NOT SHOWN FOR CLARITY
FIGURE 4-6 DC Transmitter with Relay to AMC Monitor

16
4.2.1.4 DC Transmitter with Relay to BAS with own Power Supply (Optional)
The AMC-VersaTox with relay, power board option requires a 3 wire connection when
interfacing to a BAS. This additional board also has an optional relay, for relay wiring see
section 4.2.2 The AMC-VersaTox with optional display and relay should be connected as shown
in the following figure, by three twisted wires in a shielded cable.
For wiring selection, see section 4.3.2.
TB1
D1
AC-IN 1
SIG
D2
ALRM
TB2
TP5
TP1
TP2
TP3
NC
SIG OUT
TP4
ALRMPWR
GND
ALARM
NO
RELAY
V+
+5V
AC-IN 2
GND
ALARM ADJ.
RELAY, POWER BOARD
NOTE: THIS WIRING SCHEME IS THE
SAME WITH THE DISPLAY OPTION
NOTE: PLUGGABLE CONNECTOR
THE AMC VersaTox HOUSING IS NOT SHOWN FOR CLARITY
WARNING
CABLE SHIELD MUST
NOT BE USED AS A
CONDUCTOR.
FILTERED
12 - 24 VDC
SUPPLY
-
+
POWER
{
BUILDING
+
-
4 - 20 mA
{
AUTOMATION
SYSTEM
FIGURE 4-7 DC Transmitter with Relay to BAS with own Power Supply
4.2.1.5 DC Transmitter with Relay to BAS without own Power Supply (Optional)
The AMC-VersaTox with relay, power board option requires a 4 wire connection when
interfacing to a BAS. This additional board also has an optional relay, for relay wiring see
section 4.2.2. The AMC-VersaTox with optional display and relay should be connected as
shown in the following figure, by four twisted wires in a shielded cable.
For wiring selection, see section 4.3.2.

17
TB1
D1AC-IN 1
SIG
D2
ALRM
TB2
TP5
TP1
TP2 TP3
NC
SIG OUT
TP4
ALRMPWR
GND
ALARM
NO
RELAY
V+
+5V
AC-IN 2
GND
ALARM ADJ.
RELAY, POWER BOARD
NOTE: THIS WIRING SCHEME IS THE
SAME WITH THE DISPLAY OPTION
NOTE: PLUGGABLE CONNECTOR
THE AMC VersaTox HOUSING IS NOT SHOWN FOR CLARITY
WARNING
CABLE SHIELD MUST
NOT BE USED AS A
CONDUCTOR.
FILTERED
12 - 24 VDC
SUPPLY
-
+
POWER
{
BUILDING
+
-
4 - 20 mA
{
AUTOMATION
SYSTEM
FIGURE 4-8 DC Transmitter with Relay to BAS without own Power Supply
4.2.1.6 DC Transmitter with relay to Power Supply only (Optional)
The AMC-VersaTox with relay, power board option requires a 2 wire connection when
interfacing to a DC power supply. This additional board also has an optional relay, for relay
wiring see section 4.2.2. The AMC-VersaTox with optional display and relay should be
connected as shown in the following figure, by a twisted pair of wires in a shielded cable.
For wiring selection, see section 4.3.2.
TB1
D1AC-IN 1
SIG
D2
ALRM
TB2
TP5
TP1
TP2 TP3
NC
SIG OUT
TP4
ALRMPWR
GND
ALARM
NO
RELAY
V+
+5V
AC-IN 2
GND
ALARM ADJ.
RELAY, POWER BOARD
NOTE: THIS WIRING SCHEME IS THE
SAME WITH THE DISPLAY OPTION
NOTE: PLUGGABLE CONNECTOR
THE AMC VersaTox HOUSING IS NOT SHOWN FOR CLARITY
WARNING
CABLE SHIELD MUST
NOT BE USED AS A
CONDUCTOR.
FILTERED
12 - 24 VDC
SUPPLY
-
+
POWER
{
FIGURE 4-9 DC Transmitter with Relay to Power Supply

18
4.2.1.7 AC Transmitter with or without Relay to BAS (Optional)
The AMC-VersaTox can have a 4 wire connection to a BAS with the addition of the relay, power
board. This additional board also has an optional relay, for relay wiring see section 4.2.2. The
AMC-VersaTox with optional display and relay should be connected as shown in the following
figure, by four twisted wires in a shielded cable.
For wiring selection, see section 4.3.3.
NOTE: A separate transformer must be employed with each AMC-VersaTox.
TB1
D1AC-IN 1
SIG
D2
ALRM
TB2
TP5
TP1
TP2 TP3
NC
SIG OUT
TP4
ALRMPWR
GND
ALARM
NO
RELAY
V+
+5V
AC-IN 2
GND
ALARM ADJ.
RELAY, POWER BOARD
NOTE: THIS WIRING SCHEME IS THE
SAME WITH THE DISPLAY OPTION
NOTE: PLUGGABLE CONNECTOR
THE AMC VersaTox HOUSING IS NOT SHOWN FOR CLARITY
WARNING
CABLE SHIELD MUST
NOT BE USED AS A
CONDUCTOR.
POWER
{
TRANSFORMER
120 VAC
OR 240 VAC
L2
L1
BUILDING
+
-
4 - 20 mA
{
AUTOMATION
SYSTEM
FIGURE 4-10 AC Transmitter with or without Relay to BAS
4.2.1.8 AC Transmitter with or without Relay to Transformer only (Optional)
The AMC-VersaTox can have a 2 wire connection to a transformer with the addition of the relay,
power board. This additional board also has an optional relay, for relay wiring see section 4.2.2.
The AMC-VersaTox with optional display and relay should be connected as shown in the
following figure, by a twisted pair of wires in a shielded cable.
For wiring selection, see section 4.3.3.
NOTE: A separate transformer must be employed with each AMC-VersaTox.

19
RELAY, POWER BOARD
NOTE: THIS WIRING SCHEME IS THE
SAME WITH THE DISPLAY OPTION
NOTE: PLUGGABLE CONNECTOR
THE AMC VersaTox HOUSING IS NOT SHOWN FOR CLARITY
WARNING
CABLE SHIELD MUST
NOT BE USED AS A
CONDUCTOR.
POWER
{
TRANSFORMER
120 VAC
OR 240 VAC
L2
L1
TB1
D1AC-IN 1
SIG
D2
ALRM
TB2
TP5
TP1
TP2 TP3
NC
SIG OUT
TP4
ALRMPWR
GND
ALARM
NO
RELAY
V+
+5V
AC-IN 2
GND
ALARM ADJ.
FIGURE 4-11 AC Transmitter with or without Relay to Transformer
4.2.1.9 120VAC Power Supply with Buzzer (Optional)
The AMC-VersaTox with optional display can have a 120VAC plug in power supply. With this
power supply, the relay, power board is included and the relay is wired to control the buzzer.
The internal wiring is shown in the following figure.
TB1
D1AC-IN 1
SIG
D2
ALRM
TB2
TP5
TP1
TP2
TP3
NC
SIG OUT
TP4
ALRMPWR
GND
ALARM
NO
RELAY
V+
+5V
AC-IN 2
GND
ALARM ADJ.
RELAY, POWER BOARD
NOTE: THIS WIRING SCHEME IS THE
SAME WITH THE DISPLAY OPTION
THE AMC VersaTox HOUSING IS NOT SHOWN FOR CLARITY
BUZZER
120VAC PLUG IN
WALL ADAPTER
POWER SUPPLY
-
+
POWER
{
BLK
RED
NOTE: PLUGGABLE CONNECTOR
FIGURE 4-12 120VAC Power Supply with Buzzer
The optional BAS interface is shown in the following figure. For wiring selection, see to section
4.3.1 and refer to the curve on the graph that matches the plug in power supply output.

20
TB1
D1
AC-IN 1
SIG
D2
ALRM
TB2
TP5
TP1
TP2 TP3
NC
SIG OUT
TP4
ALRMPWR
GND
ALARM
NO
RELAY
V+
+5V
AC-IN 2
GND
ALARM ADJ.
RELAY, POWER BOARD
NOTE: THIS WIRING SCHEME IS THE
SAME WITH THE DISPLAY OPTION
THE AMC VersaTox HOUSING IS NOT SHOWN FOR CLARITY
WARNING
CABLE SHIELD MUST
NOT BE USED AS A
CONDUCTOR.
NOTE: PLUGGABLE CONNECTOR
+
-
{
BUILDING
4 - 20 mA
AUTOMATION
SYSTEM
FIGURE 4-13 Optional BAS interface
4.2.2 RELAY WIRING (OPTIONAL)
When the optional Relay, Power board is added to the AMC-VersaTox, an optional SPST relay
with a 2A @ 30VDC resistive contact rating is included on the board. The following figure shows
the general relay wiring scheme. The contacts may be configured as normally-open (NO) or
normally-closed (NC) using the alarm relay selector, see section 3 item 19. The alarm relay
selector is a pin header with a moveable strap for selecting the contact configuration. There are
two positions on the selector; move the strap to the center of the board for NO and to the edge
of the board for NC.
TB1
D1AC-IN 1
SIG
D2
ALRM
TB2
TP5
TP1
TP2 TP3
NC
SIG OUT
TP4
ALRMPWR
GND
ALARM
NO
RELAY
V+
+5V
AC-IN 2
GND
ALARM ADJ.
RELAY, POWER BOARD
LOAD SOURCE
+
-
NON-INDUCTIVE
LOAD CIRCUIT
FIGURE 4-14 Relay Wiring