Digital Input Module; Analog Output Module - Siemens UL489 Quick Start Manual

Zone Selective Interlocking (ZSI) Module
The ZSI module provides the complete range of selectivity with the short delay time of t
ms, irrespective of the number of fault zones and the location of the short circuit in the power
distribution system. The ZSI module must be the first module to be connected to the
CubicleBUS.
Rotary Switch Settings
G: ground fault protection
S: short circuit protection
S + G: short circuit and ground fault protection
Test (rotary switch): the outputs are set

Digital Input Module

"BUS Input"
Binary inputs 1-6 are active. If there is an input signal available, an associated massage is
transmitted to the PROFIBUS-DP or MODBUS via the COM15/16 module.
"Parameter Switch"
Input 1 is used for parameter A to B switchover (ETU755 and ETU776 trip units only), all other
inputs have no function.
LED1 Parameter set A active
LED1 Parameter set B active
The parameter switchover query can be overruled by a query via the communication bus, the
BDA or the ETU776 graphical display.

Analog Output Module

Two different formats can be selected:
+20mA, output via module terminal strip X5
0-10V, output via module terminal strip X4
Position AO 1
I IL1
U UL12
P PL1
f f
cosφ cosφ L1
Max. 20 breaker modules in
Max. 8 breaker modules out
AO 2 AO 3
IL2 IL3
UL23 UL31
PL2 PL3
ULLavg Ptotal
cosφ L2 cosφ L3
= 50
ZSI
AO 4
IN
UL1N
S
total
cosφavg
Phase unbalance
current in %
8