Installation and Configuration 3
Man-1453 Rev.01
Sigma ZXT SI Product Manual
6
Addressing Status Units
To enable the Control Panel to know whether any Status Units that should be connected have been disconnected
(and indicate a fault condition), each status unit must be allocated an address. The address switch should never be
set with all switches off.
This is achieved by setting a binary number from 1 to 7 on the 3 way, DIL switch located at the bottom of the Status
Unit PCB.
The order of the addresses is not important but each status unit must be allocated a different address. The switch
settings for each of the addresses are shown below.
Figure 3-3
DIL Switch Address Numbering
Electrical Connections
All connections for wiring are to a single row of screw terminals along the right-hand edge of the printed circuit board
to the rear of the enclosure lid.
Figure 3-4
Screw Terminals
The table below shows terminal designations.
Terminal
Function
E
Cable shield, earth terminal.
24V (+/-),(+/-)
Power input, typically from control panel. Secondary set of
common terminals for powering other status units.
RS485 (+/-),(+/-)
RS485 data input from control panel/network. Secondary set
of common terminals for connecting other status units.
MODE
Input terminals for a Mode Select ancillary.
HOLD
Input terminals for a Hold Off ancillary.
E
+ - + - + - + -
MODE
24V DC
RS485 RS485
HOLD