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
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