Model MicroCEM

Instruction Manual

748467-A January 2002

SIGNAL NAME

DEFINITION

PIN

DCD (pin 1)

Data Carrier Detect Input

1

DSR (pin 6)

Data Set Ready Input

2

RxD (pin 2)

Receive Data Input

3

RTS (pin 7)

Request to Send Output

4

TxD (pin 3)

Transmit Data Output

5

CTS (pin 8)

Clear To Send Input

6

DTR (pin 4)

Data Terminal Ready Output

7

RI (pin 9)

Ring Indicator Input

8

GND (pin 5)

Signal Ground

9

 

Not Used

10-13

Table 2-5. RS-232 Interface Terminal Assignments

 

SIGNAL NAME

 

DEFINITION

PIN

TxD/RxD+ (pin 2)

 

Bi-directional Data

A

TxD/RxD- (pin 7)

 

B

 

 

GND (pin 3)

 

Ground

C

 

Table 2-6. RS-485 Terminal Assignments

 

 

 

 

 

SIGNAL NAME

 

DEFINITION

PIN

TxD+ (pin 1)

 

Transmit Data

1

TxD- (pin 2)

 

2

 

 

RxD+ (pin 3)

 

Receive Data

3

RxD- (Pin 6)

 

4

 

 

 

 

Not Used

5-6

Table 2-7. LAN Interface Terminal Assignments

 

 

 

 

 

SIGNAL NAME

 

DEFINITION

PIN

TIP (pin T)

 

Modem Interface to Phone Line

A

RING (pin R)

 

B

 

 

 

 

Not Used

C

Table 2-8. Phone Line (Modem) Terminal Assignments

 

 

 

 

 

SIGNAL NAME

 

DEFINITION

PIN

Vbb

 

+24VDC

A

Vbb_rtn

 

+24V Return

B

Gnd

 

GND

C

Table 2-9. Antenna (Peltier Power) Connection Terminal Assignments

Rosemount Analytical Inc. A Division of Emerson Process Management

Installation

2-13