User`s guide

Specifications
Page 34
RS-232 (RTU) Interface
Signal Name Modem
Input/Output
DB25 Pin Description
Earth GND

1 Earth Ground
TXD Input 2 Transmit Data
RXD Output 3 Receive Data
RTS Input 4 Request To Send
CTS Output 5 Clear To Send
DSR Output 6 Data Set Ready
(Modem Ready)
SG - 7 Signal Ground
DCD Output 8 Data Carrier
Detected
DTR Input 20 Data Terminal
Ready (Host Ready)
Environmental Specifications
Operating temperature: -40 to + 85
o
C
Storage temperature: -40 to +125
o
C
Operating humidity: 5 to 95 %, non-condensing.
Isolation: 3750 V RMS
Surge protection: Leased line up to 15K VA