Connections
19
Doc.ID. HMSI-168-92
Netbiter EasyConnect
Doc.Rev. 2.10
4.2.4 D-Sub Connector
The male 9-pin D-Sub connector provides an RS-232 interface,
which can be used for communicating with Modbus RTU devices,
or for attaching a GPS device, to keep track of the position of the
remote system.
Note that when using the D-Sub connector to connect Modbus devices via RS-232, it will not be
possible to simultaneously use RS-485 on the 3-pin terminal block. Connecting a GPS device will
not affect the simultaneous use of RS-485.
4.2.5 Antenna Connector
The antenna connector is a standard SMA screw connector. Optional external antennas are available
from your supplier.
4.3 Netbiter EasyConnect EC250
4.3.1 Terminal Block (12-pin)
Field wiring terminals must be connected with minimum wire
size 24AWG.
Pin
Other Device
1
CD (Carrier Detect)
2
Tx (Transmit)
3
Rx (Receive)
4
DTR (Data Terminal Ready)
5
GND
6
DSR (Data Set Ready)
7
RTS (Request To Send)
8
CTS (Clear To Send)
9
RI (Ring Indicator)
Terminal No. Pin
Function
24
V+
Power 9-24V DC
23
GND
Power ground
22
DI: COM
Digital input common
21
DI: DI1
Digital input #1
20
DI: DI2
Digital input #2
19
RS232: Rx
RS-232 Receive
18
RS232: Tx
RS-232 Transmit
17
COM
Common
16
RS422: RD(A)
RS-485 Receive A
15
RS422: RD(B)
RS-485 Receive B
14
RS485: TD(A)
RS422
RS-485 Line A / RS-422
Transmit A
13
RS485: TD(B)
RS422
RS-485 Line B / RS-422
Transmit B
