Campbell COM220 User manual

COM220 Telephone Modem
Revision: 4/12
Copyright © 1997-2012
Campbell Scientific, Inc.

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Assistance
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COM220 Telephone Modem
Table of Contents
PDF viewers: These page numbers refer to the printed version of this document. Use the
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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.....................................................................5
3.3 Telephone to MD485 or Telephone to RF Systems..................................6
3.4 Telephone Service ....................................................................................6
3.5 Connecting to a Surge Protector ...............................................................6
4. Modem Settings ...........................................................8
5. Troubleshooting ..........................................................9
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
ii
D. FCC Warning to Users of
Class A Computing Devices..............................D-1
E. IC Information .......................................................... E-1
List of Figures
1. COM220 DIP switches. Five screws and the outer cover must be
removed for access to the DIP switches.................................................. 1
2. COM220 .................................................................................................... 2
3. CR1000 and COM220 using remote telephone line .................................. 4
4. CR10X with CR10 wiring panel and COM220 using RJ11C telephone
jack.......................................................................................................... 5
5. Top view of surge suppressor wiring......................................................... 7
6. Side view of surge suppressor wiring ........................................................ 8
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

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 battery-
powered 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).
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). Instructions for configuring the COM220 are
described in Appendix A.
IMPORTANT
FIGURE 1. COM220 DIP switches. Five screws and the outer cover must
be removed for access to the DIP switches.
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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
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. 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
and LoggerNet Help files for detailed descriptions of these instructions. In
addition, Appendix A.4 includes sample programs for the ModemCallback,
DialModem, and P97 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.
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.
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COM220 Telephone Modem
2. Specifications
Standards: V.92, K56Flex, V.90, V.34, V.32bis, V32,
V23, V22bis, V22, V.21, B212, B103
Registration: FCC US: 3A4M508BSM2-T-W
IC 2377 A-SM2TW
TBR21
Operating voltage: 12 VDC
Current drain: 100 to 120 μA quiescent; 30 mA active
Communication rate between
datalogger and COM220: 9600, 38400, 57600, 115200 bps (selected
by user)
Operation: Full-duplex over standard analog phone
lines
Operating temperature: -25° to +50°C std, -40° to +85°C optional
Dimensions: 16.5 x 2.5 x 6.6 cm (6.5 x 1.0 x 2.6 in)
Weight: 0.16 kg (0.35 lbs)
3. Installation
The COM220 is designed to be used with standard analog telephone lines. It
will not work with a digital telephone line. Connection to telephone-company-
provided coin service (central office implemented systems) is prohibited.
Connection to party line service is subject to state tariffs.
3.1 Connecting to Datalogger
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).
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COM220 Telephone Modem
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
SE 12 34 56 78
H
1234
L
DIFF
H
EX1
HLHLL
P2
P1
12VG
DC ONLY
CAUTION
LUG
GROUND
POWER IN
WIRING PANEL
CR1000
PERIPHERAL PORT
RS-232 (Not Isolated)
SN:
CS I/O
MADE IN USA
11
109
SE 15 1613 1412
H
L
DIFF
H
EX2
HLHLL
EX3
5678
SW-12
5V 12V 12V
C5 C4 G G G G C1 C2 C3 G G
C6 C7 C8
Tx
COM1
Rx Tx Rx Tx Rx Tx Rx
COM2 COM3 COM4
POWER OUT
SDM
G 12V
Burial Phone Cable
Blue = Ring
Blue/White = Tip
Phone Line
Transient Protector
(Model 6362 or 2372-01)
SC12 Cable
Earth
Ground
FIGURE 3. CR1000 and COM220 using remote telephone line
4