Table 3. Psu Terminal Allocation - Honeywell Touchpoint Pro Technical Handbook

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.
Part. No. 2400M2501_6
INTRODUCTION
Terminal
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
— Relay Contacts 1 & 2
DC OK

Table 3. PSU Terminal Allocation

Figure 28. Power Redundancy Module Operation
Purpose
21
Failure
Monitor
20 A
Load
Touchpoint Pro
Technical Handbook