COMPONENTS

COM220Phone Modem

www.campbellsci.com/com220

Ideal for Remote Sites

Low power use; wide operating temperature range

More info: 435.227.9120

A COM220 is connected with a CR1000 and a surge protector.

OverviewThe COM220 phone modem enables communications between a computer and a Campbell Scientific data logger over a public switched telephone network. A Hayes-compatible modem is required at the computer site. The COM220 connects to the data logger at the field site.

Benefits and FeaturesWide operating temperature range and low power require-ments make it ideal for use at remote sitesSupports communication rates up to 115.2 kbps between mo-dem and data logger. In practice, data transmission through phone lines is generally constrained to 33.6 kbps.Compatible with most Campbell Scientific data loggersOffers both modem enabled (ME) and synchronous device communications (SDC) modesAllows user to set the number of rings before answering call

Technical DescriptionThe COM220 has a CS I/O port, power terminals, screw terminals, and an RJ-11C jack. The data logger connects with the CS I/O port using an SC12 or SC12R-6 cable. The RJ-11C jack is for attach-ing a surge-protected telephone line. Alternatively, the screw terminals (GND, RING, TIP) can be used to connect the COM220 with a phone line using a surge protector.

SE 1 2 3 4 5 6 7 8

H1 2 3 4

LDIFF

H EX1

H LH LL P2P1

12VG

DC ONLYCAUTION

LUGGROUND

POWER IN

WIRING PANELCR1000

PERIPHERAL PORT

RS-232 (Not Isolated)

SN:

CS I/O

MADE IN USA

11109SE 15 1613 1412

HLDIFF

H EX2

H LH LL EX35 6 7 8

SW-1

2

5V 12V

12V

C5

C4

G G G G C1

C2

C3

G GC6

C7

C8

TxCOM1

Rx Tx Rx Tx Rx Tx RxCOM2 COM3 COM4POWER OUT

SDM

G 12V

Burial Phone Cable

Blue = Ring

Blue/White = TipPhone LineTransient Protector(Model 6362 or 2372-01)

SC12 Cable

Earth GroundEarth

Ground Phone Line Transient Protector

Blue/White = Tip

Burial Phone Cable

Blue = Ring SC12 Cable

Hardware Requirements

At Computer Base Station(1) User-supplied computer running PC400 or LoggerNet Data Logger Support Software

(2) 7026 serial cable or equivalent

(3) Customer-supplied, Hayes-compatible modem

(4) Switched telephone network that connects the computer base station with each data logger field site

At Field Site(5) Telephone surge protector if the telephone company has not installed surge protection

(6) COM220 modem

(7) SC12 cable (included with COM220); the SC12R-6 may be purchased if a longer cable is required.

(8) Data logger

(9) Typically an ENC12/14, ENC14/16, or ENC16/18 enclosure

(10) Power supply, usually the data logger’s sealed rechargeable battery recharged with ac power or solar panel

SpecificationsStandards: V.92, K56Flex, V.90, V.34, V.32bis, V32, V23, V22bis, V22, V.21, B212, B103View EU Declaration of Conformity at: www.campbellsci.com/com220Operating Voltage: 12 VdcOperating Temperature: -25° to +50°CCommunication Rate Between Data Logger and COM220 (selected by user): 9600, 38400, 57600, 115200 bps)Operation: Full-duplex over standard analog phone linesDimensions: 16.5 x 2.5 x 6.6 cm (6.5 x 1.0 x 2.6 in)Weight: 0.16 kg (0.35 lb)

RegistrationFCC US: 3A4M508BSM2-T-WIC 2377 A-SM2TWTBR21

Current DrainQuiescent: ~120 μAActive: ~30 mA

© 2006, 2019Campbell Scientific, Inc.

February 1, 2019

HayesCompatible

Modem

SurgeProtector

COM210Modem

Datalogger

Environmental Enclosure

SC12

Cable

Modem

Cable

Standard TelephoneLine

3

4

57

6 8

9

2

COM220 Modem

1

Data Logger