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Instruction Manual
748467-A
January 2002
Rosemount Analytical Inc. A Division of Emerson Process Management Installation 2-13
Model MicroCEM
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) A
TxD/RxD- (pin 7)
Bi-directional Data
B
GND (pin 3)
Ground
C
Table 2-6. RS-485 Terminal Assignments
SIGNAL NAME DEFINITION PIN
TxD+ (pin 1) 1
TxD- (pin 2)
Transmit Data
2
RxD+ (pin 3) 3
RxD- (Pin 6)
Receive Data
4
Not Used
5-6
Table 2-7. LAN Interface Terminal Assignments
SIGNAL NAME DEFINITION PIN
TIP (pin T) A
RING (pin R)
Modem Interface to Phone Line
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