Technology for safety 
4 
D1000 series - Intrinsically Safe Isolators 
 
D1000 Power Bus Enclosure 
Module Enclosure with 
Power Bus Connector female Side 
Module Enclosure with 
Power Bus Connector male Side 
Power Supply Voltage 12-24 Vdc can be applied to the module, 
by connecting directly the voltage to the plug-in Terminal Block of 
each module, or via the Power Bus System. The system consists 
of a standard DIN-Rail and modules with Bus Connectors (female 
on one side and male on the other). The maximum allowed powering 
capacity is 8 Amp. It is always possible to remove modules, without 
disconnecting the bus connection. When the Power Bus is used, 
Supply Contacts on Terminal Blocks are omitted to avoid accidental 
short circuits on the Power Bus. Cumulative Fault Alarm indication is 
provided on the Bus connection. This signal is in common with the 
supply and drives a remote indication, typically through a D1091S 
module. 
Power 
Supply 
DIN-Rail Anchor for terminal block 
Side of the Power Bus 
DIN-Rail Stopper 
B+  A -  FLT    -  + 
Modbus  Fault 
Modbus 
+  -  FLT  A-  B+ 
Power 
Supply 
Fault