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INTRODUCTION
Touchpoint Pro
Pt. No. 2400M2566_1_EN
21
Operating Manual
Terminal
Purpose
N
~ AC 110/240 V Neutral In
L
~ AC 110/240 V Line In
Protective Earth (Ground)
+
—
DC 24 – 28 +V Output 1
+
—
DC 24 – 28 +V Output 2
–
—
DC –V Output 1
–
—
DC –V Output 2
DC OK
—
Relay Contacts 1 & 2
Table 3.
PSU Terminal Allocation
3.4.2
Power Redundancy Module (RDN)
The RDN is an optional power supply backup system that can be installed with a second PSU to offer dual power supply
redundancy. Often the Mains supply will be connected to the first PSU and a stand-by generator connected to the second
PSU. The RDN will take power from either input and output it as a single source. See diagram below for cabling details.
Note
: The RDN Output can also provide further redundancies via an optional battery backup and DC Uninterruptible Power
Supply (DC-UPS) module.
Figure 28.
Power Redundancy Module Operation
Failure
Monitor
20 A
Load