Campbell Hausfeld COM220 User Manual
COM220 Telephone Modem
Revision: 3/07
Copyright © 1997-2007
Campbell Scientific, Inc.
Warranty and Assistance
The COM220 TELEPHONE MODEM is warranted by CAMPBELL
SCIENTIFIC, INC. to be free from defects in materials and workmanship
under normal use and service for twelve (12) months from date of shipment
unless specified otherwise. Batteries have no warranty. CAMPBELL
SCIENTIFIC, INC.'s obligation under this warranty is limited to repairing or
replacing (at CAMPBELL SCIENTIFIC, INC.'s option) defective products.
The customer shall assume all costs of removing, reinstalling, and shipping
defective products to CAMPBELL SCIENTIFIC, INC. CAMPBELL
SCIENTIFIC, INC. will return such products by surface carrier prepaid. This
warranty shall not apply to any CAMPBELL SCIENTIFIC, INC. products
which have been subjected to modification, misuse, neglect, accidents of
nature, or shipping damage. This warranty is in lieu of all other warranties,
expressed or implied, including warranties of merchantability or fitness for a
particular purpose. CAMPBELL SCIENTIFIC, INC. is not liable for special,
indirect, incidental, or consequential damages.
Products may not be returned without prior authorization. The following
contact information is for US and International customers residing in countries
served by Campbell Scientific, Inc. directly. Affiliate companies handle
repairs for customers within their territories. Please visit
www.campbellsci.com to determine which Campbell Scientific company
serves your country. To obtain a Returned Materials Authorization (RMA),
contact CAMPBELL SCIENTIFIC, INC., phone (435) 753-2342. After an
applications engineer determines the nature of the problem, an RMA number
will be issued. Please write this number clearly on the outside of the shipping
container. CAMPBELL SCIENTIFIC's shipping address is:
CAMPBELL SCIENTIFIC, INC.
RMA#_____
815 West 1800 North
Logan, Utah 84321-1784
CAMPBELL SCIENTIFIC, INC. does not accept collect calls.
COM220 Telephone Modem
Table of Contents
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1. Introduction..................................................................1
1.1 General Description..................................................................................1
1.2 Computer Requirements...........................................................................2
2. Specifications ..............................................................3
3. Installation....................................................................3
3.1 Connecting to Datalogger.........................................................................3
3.2 Connecting to Earth Ground.....................................................................4
3.3 Telephone to MD485 or Telephone to RF Systems..................................4
3.4 Telephone Service ....................................................................................4
4. Modem Settings...........................................................6
5. Troubleshooting ..........................................................7
Appendices
A. Changing COM220 Settings................................... A-1
A.1 DIP Switch Settings............................................................................ A-1
A.2 Hayes AT Commands......................................................................... A-2
A.3 Downloading a New Operating System to the COM220.................... A-6
A.4 Program Examples.............................................................................. A-7
A.4.1 ModemCallback Example (for CR1000).................................. A-7
A.4.2 DialModem Example (for CR1000).......................................... A-8
A.4.3 P97 Instruction (for CR10X)..................................................... A-9
A.4.4 Example Programs for Data-Callbacks via a CR1000
Datalogger Router .............................................................. A-11
B. CS I/O Connection................................................... B-1
B.1 CS I/O 9 Pin Connection......................................................................B-1
C. Theory of Operation................................................C-1
C.1 Theory of Operation.............................................................................C-1
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COM220 Telephone Modem Table of Contents
D. FCC Warning to Users of
Class A Computing Devices..............................D-1
E. IC Information..........................................................E-1
List of Figures
1. COM220 DIP Switches.............................................................................. 1
2. COM220 .................................................................................................... 2
3. CR1000 and COM220 Using Remote Telephone Line ............................. 5
4. CR10X with CR10 Wiring Panel and COM220 Using RJ11C
Telephone Jack ....................................................................................... 6
A-1. COM220 to Computer Connection.................................................... A-3
A-2. Device Configuration Screen............................................................. A-4
A-3. Terminal Emulator Screen in Device Configuration .........................A-5
A-4. Send OS Screen in Device Configuration..........................................A-7
B-1. CS I/O Pin Out................................................................................... B-1
List of Tables
1. Dataloggers that Require Direct 12 VDC Connection to COM220........... 4
A-1. Selecting ME Baud-rates via DIP Switches 3 and 4 .......................... A-2
A-2. Maximum Datalogger ME Baud-rate................................................A-2
ii
COM220 Telephone Modem
1. Introduction
1.1 General Description
The COM220 modem is a selectable-baud-rate modem employing the Hayes
AT command set. Its primary use is as a remote site phone modem connected
to a CSI datalogger. The modem is powered and enabled by the batterypowered datalogger. When not active, the COM220 draws 100 to 120 µA
from the datalogger’s 12 VDC output. During a call, it draws about 30 mA.
The COM220 is a replacement for the COM210. However, the COM220
supports both synchronous device communication (SDC) and modem enable
(ME) communication, as well as various ME baud rates (9600 to 115200).
The default settings for the COM220 at shipping are SDC7, and PakBus ready
(see Appendix A for details).
IMPORTANT
The default settings ARE NOT compatible with dataloggers
that have non-PakBus operating systems (e.g., CR510,
CR10X, CR23X, CR7, CR5000). However, compatibility
with non-PakBus dataloggers is easily achieved by
changing DIP switch settings (Figure 1). If you want to use
the COM220 as a drop-in replacement for the COM210,
the COM220 settings should be changed to modem enable
(DIP switch 1 open), and 9600 baud (DIP switches 3 and 4
open). In addition, DIP switch 5 must be closed for
connection to non-PakBus dataloggers. Instructions for
configuring the COM220 are described in Appendix A.
FIGURE 1. COM220 DIP Switches. Five Screws and the Outer Cover
Must be Removed for Access to the DIP Switches.
1
COM220 Telephone Modem
The COM220 is connected to a CSI datalogger by a 9-pin subminiature D
cable. This is the same 9-pin CS I/O interface common to all Campbell
Scientific dataloggers (except the CR200 series). This is not an RS-232
connection. Appendix B describes the CS I/O interface.
The COM220 can be used as an originate modem at the datalogger site. For
non-Pakbus dataloggers (e.g., CR510, CR10X, CR23X), and for older PakBus
dataloggers (e.g. CR10XPB, CR23XPB, CR510PB) use Instruction 97 to
program the datalogger to originate a call to the computer; refer to your
datalogger manual for a detailed description of Instruction 97. For newer
Pakbus dataloggers (e.g., CR800, CR1000, CR3000) use the ModemCallback
instruction or the DialSequence and DialModem instructions to program the
datalogger to originate a call to the computer. Again, refer to your datalogger
manual and LoggerNet Help files for detailed descriptions of these
instructions. In addition, Appendix A.4 includes sample programs for the P97,
ModemCallback, and DialModem instructions.
The COM220 features a built-in speaker to allow monitoring of calling and
connection. See Appendix A.2 for the Hayes AT commands that affect the
speaker on/off and volume settings.
2
FIGURE 2. COM220
1.2 Computer Requirements
A Hayes-compatible modem is used at the computer site with Campbell
Scientific computer software to call the datalogger attached to the COM220.
The computer’s modem must be configured to the proper settings using a set of
modem initialization strings in the software program’s pick list.
2. Specifications
• Standards: V.92, K56Flex, V.90, V.34, V.32bis, V32, V23, V22bis, V22,
• Registration:
• Operating voltage: 12 VDC
• Current drain: 100 to 120 µA quiescent; 30 mA active
• Communication rate between datalogger and COM220: 9600, 38400,
• Operation: Full-duplex over standard analog phone lines
• Operating temperature: -25° to +50°C std, -55° to +85°C optional
COM220 Telephone Modem
V.21, B212, B103
FCC US: 3A4M508BSM2-T-W
IC 2377 A-SM2TW
TBR21
57600, 115200 bps (selected by user)
3. Installation
3.1 Connecting to Datalogger
• Dimensions: 6.5” x 1.0” x 2.6” (16.5 x 2.5 x 6.6 cm)
• Weight: 0.35 lbs (0.16 kg)
The COM220 is designed to be used with standard analog telephone lines. It
will not work with a digital telephone line. Connection to telephone-companyprovided coin service (central office implemented systems) is prohibited.
Connection to party line service is subject to state tariffs.
Connect the cable from the telephone RJ11C jack to the modem as shown in
Figure 4. If the telephone company has not installed surge protection in the
telephone line (no RJ11C jack), one must install surge protection (CSI item
number 6362 or 4330) and connect the ring and tip terminal blocks as shown
in Figure 3.
Current Campbell Scientific dataloggers provide 12 VDC to the COM220 from
the CS I/O port via the SC12 cable (Figure 2). Older dataloggers do not
provide 12 VDC on their CS I/O port. When used with the older dataloggers
listed in Table1, 12 VDC and ground need to be connected via the green power
connector on the side of the COM220 (see Figure 4).
3
COM220 Telephone Modem
3.2 Connecting to Earth Ground
TABLE 1. Dataloggers that Require Direct
12 VDC Connection to COM220
CR10(X) with silver wiring panel
CR10(X) with black CR10 wiring panel (P/N
8032)
21X(L)—serial number 13,442 or lower
CR500⎯serial number 1764 or lower
CR7—700X serial number 2778 or lower
Connect the green 14 awg grounding wire (provided with the COM220) to the
ground terminal (GND) on the COM220 and to the enclosure’s earth ground
connection. If the site does not have a grounded enclosure, then connect the
ground wire directly to an earth ground connection. The datalogger ground
should also be tied to the earth ground.
CAUTION
The modem must be grounded for its transient protection
to work.
3.3 Telephone to MD485 or Telephone to RF Systems
Telephone to MD485 or telephone to radio configurations can be utilized for
communicating with multiple dataloggers through one telephone line. For
telephone to MD485 or telephone to radio communications (with no datalogger
router), the COM220 should be set for ME mode. The COM220 and MD485
should be set to the same baud rate. When using a PakBus network with a
datalogger configured as a router, the COM220 can be set for SDC7 and the
radio for SDC8, or vice versa. Contact a Campbell Scientific Applications
Engineer for more information. In addition, Appendix A.4.4 includes example
programs for both a router datalogger and a remoter datalogger communicating
by telephone to MD485 or telephone to radio.
3.4 Telephone Service
The goal of the telephone company is to provide you with the best service it
can. In order to do this, it may occasionally be necessary for them to make
changes in their equipment, operations, or procedures. If you have any
questions about your telephone line, such as how many pieces of equipment you
can connect to it, the telephone company will provide this information upon
request. If the telephone company requests information concerning the
equipment which you have connected to your telephone line, the FCC
registration number and the ringer equivalence number (REN) of the COM220
are listed on its label. Additional technical information from the FCC and IC on
the COM220 is available in Appendices D and E, respectively.
4
12 34 56 78
SE
1234
DIFF
SE
DIFF
H
L
H
109
5678
L
H
HL
L
11
H
HL
L
COM220 Telephone Modem
POWER IN
GROUND
LUG
G 12V
CAUTION
DC ONLY
12VG
CR1000
WIRING PANEL
RS-232 (Not Isolated)
HL
EX1
P2
P1
1412
15 1613
HL
EX2
EX3
G
POWER OUT
G
5V
SW-12
G
12V
COM1
COM2
Tx
Rx Tx Rx Tx Rx Tx Rx
GC1C2C3G
12V
SDM
COM3
COM4
C5
C4
C6C7C8
G
CS I/O
SN:
PERIPHERAL PORT
MADE IN USA
Earth
Ground
Blue = Ring
Burial Phone Cable
Phone Line
Blue/White = Tip
Transient Protector
(Model 6362 or 2372-01)
FIGURE 3. CR1000 and COM220 Using Remote Telephone Line
SC12 Cable
5
COM220 Telephone Modem
Telephone Wall
Jack
DIFFSEAG H L AG H L AG H L AG GGE3 AG
4 5 6
78 910 1112
CAMPBELL
SCIENTIFIC
INC.
12 34 56
SE
1 2 3
AG H L AG H L AG H L AG GGE1 E2
DIFF
To Earth
Ground
14 AWG Ground Wire
12V 12V
GGGG
SWITCHED
12V
SWITCHED
12V
EARTH
CONTROL
G 5V5V P1 P2 C8 C7C6C5C4C3 C2 C1
G 12V
POWER
IN
WIRING PANEL NO.
Red
(+12v)
SERIAL I/O
CR10
MADE IN USA
SC12 Cable
Black
(Ground)
FIGURE 4. CR10X with CR10 Wiring Panel and COM220 Using RJ11C Telephone Jack
4. Modem Settings
The COM220 comes from the factory with the appropriate settings for PakBus
dataloggers (e.g., CR8x0, CR1000, CR3000, CR10XPB, CR23XPB). It is
programmed to answer a call as soon as a call is detected. It is also
programmed for Synchronous Device Communication (SDC7). As mentioned
in the introduction, these settings must be modified in order to connect to older
dataloggers (e.g. CR510, CR10X, CR23X, CR7) with non-PakBus operating
systems.
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COM220 Telephone Modem
You can modify the following COM220 settings with DIP switches:
1) Communication mode (e.g., SDC or Modem Enable)
2) ME baud rate
3) PakBus ready
Additional changes (see examples below) may be modified with Hayes AT
commands. Appendix A.2 describes the procedures and commands required to
effect the changes described in this section.
Some of the AT command settings one may change are:
Disable auto-answer: This option is used only when the modem is not to
answer a call. For example, the COM220 is connected to a telephone line that
is to be used part time for voice communication. In this situation it is best to
have the datalogger call the computer.
Speaker On/Off and Volume: Default settings have the speaker on only
during call establishment and set to a low volume. The speaker may be turned
completely off in order to limit the current drain during the connection or so
you don’t hear the speaker. It is also possible to set the speaker volume higher,
if you want to hear the speaker better than the default low volume setting.
Answer on X
and you only want it to answer after a specified number of rings. For example,
the COM220 is sharing a line with people at an office. It can be programmed
to only answer after the third ring. If the PC calls when the office is closed and
no one answers the phone after three rings, the datalogger will pick it up.
Change telephone system types: Change from the Bell 212A (U.S. and
Canada) system to a CCITT V.32 (foreign, 9600 baud) or CCITT V.22
(foreign, 1200 baud) system. This does not mean that the COM220 is tested
and approved for all foreign countries.
CITT is an international consultative committee that sets international
communications usage standards. V.32 and V.22 are CCITT standards that the
COM220 meets.
5. Troubleshooting
When the Campbell Scientific software cannot establish a link to a remote
datalogger that is connected to a COM220, check the following:
1) Verify that the modem initialization settings on yo ur computer are correct
for your specific calling modem (i.e., the modem attached to your
computer). See the calling modem’s software manual and/or help screens
for more information.
th
ring: This option is used when the modem is sharing a line
2) If using a non-PakBus datalogger (e.g., CR510, CR10X, CR23X, CR7,
CR5000 with array-based operating system), verify that DIP switch 5 on
the COM220 is in the CLOSED position. For PakBus dataloggers (e.g.,
CR800, CR850, CR1000, CR3000, CR10XPB, CR23XPB, CR510PB),
DIP switch 5 should be open. See Appendix A.1 for details.
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