User's Manual Part 1

Redundant cabling for DCNM-APS2/DCNM-PS2 units
This section describes how to create redundant cabling for DCNM-APS2 / DCNM-PS2 type
units. The maximum number of Ethernet devices in the largest possible loop (including the
root switch) is 22. In a system with no Ethernet switch(es), the APS is the root switch.
The total number of devices allowed in a loop depends on:
– The type of device connected in the loop (for example, DCNM-MMD2 devices consume
more power than DCNM-DE devices).
– The length of the loop (cable also consumes power).
The figure shows how to calculate the number of devices in the loop. The red line shows the
largest loop. The # sign shows the way the devices are counted.
In the example below up to 19 discussion devices can be connected.
#1
#2
#22
#3 #21
1
3
4
5
5
5 5
5 5
4
4
2
Figure 4.7: DICENTIS discussion devices connected with redundant cabling between DCNM-PS2 / DCNM-
APS2 type units
1: DICENTIS system/client PC.
2: Network switch (with optional redundant power supply)
3: DCNM-APS2
4: DCNM-PS2
5: DICENTIS cabling (redundant loop)
4.4.2
DICENTIS System installation design and planning | en 23
Bosch Security Systems B.V. Hardware Installation Manual 2016.07 | V1.4 |