2.4.2.5 Rs485 Port Connection - Michell Instruments Liquidew I.S. User Manual

Liquidew I.S. User's Manual
Alarm 3 (connection labelled as SP3) and Alarm 4 (connection labelled as SP4) are Form
A (single pole, single throw, normally open) relays.
The method of connection is as follows:
a. Strip back the wires of the Alarm 3 cable, exposing approximately
6mm (0.2") - the use of crimps/wire ferrules is recommended.
b. Insert the
on the terminal block and tighten the screw.
c. Insert the common lead into the
block and tighten the screw.
d. Repeat operations a. to c. for connecting the Alarm 4 cable to the SP4
terminals.
e. Check that the wiring has been completed correctly.
f. Push the terminal block fi rmly back into the

2.4.2.5 RS485 Port Connection

The RS485 connection is a push-fi t socket labelled
The method of connection is as follows:
a. Check the orientation of the RS485 connector and gently push it into the
socket.
b. Tighten the two screws on the connector.
Michell Instruments
connection lead into the
N/O
Pin Number
2
3
5
terminal way

SP3 NO
terminal way on the terminal

SP3 COM
ALARMS
COMMS
Function
B
A
0V
INSTALLATION
COM
socket.
as shown in Figure 9.
NO
23