DM4170 – Installation Manual
Installing the DM4170
204.4308.03
17
For alarm output, the equipment uses a relay. In an alarm situation
1
or when the switch is off,
pin 7 (common) is short circuited with pin 8 (NC). When operating without alarms, pin 7
(common) will be short circuited with pin 6 (NO), while pin 8 (NC) will be isolated.
Table 12 describes the pin settings used in connector RJ45 of the alarm interface.
RJ45 Male
Signal
1
Input 1 – IN+
2
Input 1 – IN-
3
Input 2 – IN+
4
Input 2 – IN-
5
Not connected
6
Output – NO (Alarm Off)
7
Output – Common
8
Output – NC (Alarm On)
Table 12 – Alarm pin connector
PSU
S AND
P
OWER
I
NPUTS
DM4170 switches have two PSU 125 power supply slots (supplied separately) on the front of
the switch.
The DM4170 switches have two PSU models: the PSU 125 DC that operates with DC -48/60
Vdc power supply and the PSU 125
AC that operates with 100/240Vac (50/60Hz) AC power
supply. For further details read the
chapter.
The PSU 125 DC has TERMINAL BLOCK power terminals; the terminals are located on the
front of the PSU.
The PSU 125 AC has three-pin IEC 320/C14 plugin power terminals; each terminal being
responsible for supplying power to each of the power sources.
The PSU 125 power sources
operate in 1:1 redundancy, with only one of them being
sufficient to maintain the switch’s full operation. The combination of AC and DC power
sources on the same switch is permitted. The insertion/removal of the power cables and the
PSU 125
can be
hot-swapped
allowing the uninterrupted operation of the switch if one of the
two power sources is turned off or fails. The PSU 125 has a PWR LED on its front panel which,
when lit, indicates that it is properly powered and operational.
1
Roadmap feature, contact
if you have any questions.
