System 450 Series Reset Control Modules with
Real-Time Clock and Relay Output Installation
Guide
Application
Important:
Use this System 450™ Series Reset
Control Modules with Real-Time Clock and Relay
Output only as an operating control. Where failure
or malfunction of the System 450 Series Control
Module could lead to personal injury or property
damage to the controlled equipment or other
property, additional precautions must be designed
into the control system. Incorporate and maintain
other devices, such as supervisory or alarm systems
or safety or limit controls, intended to warn of or
protect against failure or malfunction of the System
450 Series Control Module.
Important:
Utiliser ce System 450 Series Reset
Control Modules with Real-Time Clock and
Relay Output uniquement en tant que dispositif
de régulation. Lorsqu'une défaillance ou un
dysfonctionnement du System 450 Series Control
Module risque de provoquer des blessures ou
d'endommager l'équipement contrôlé ou un
autre équipement, la conception du système de
contrôle doit intégrer des dispositifs de protection
supplémentaires. Veiller dans ce cas à intégrer de
façon permanente d'autres dispositifs, tels que
des systèmes de supervision ou d'alarme, ou des
dispositifs de sécurité ou de limitation, ayant une
fonction d'avertissement ou de protection en cas de
défaillance ou de dysfonctionnement du System 450
Series Control Module.
System 450 is a family of modular, digital electronic
controls that is easily assembled and set up to provide
reliable temperature, pressure, and humidity control for a
wide variety of HVACR and commercial/industrial process
applications.
The System 450 reset control modules allow you to
configure custom application-specific control systems
with reset control and/or real-time setback control for
temperature and humidity (only) control applications.
System 450 expansion modules allow you to control up to
10 outputs, which can be relay and analog outputs.
C450RxN-1 and C450RxN-3 Reset Control models are
Single-Pole, Double-Throw (SPDT) relay control modules
with temperature reset capability, real-time setback
capability, a Liquid Crystal Display (LCD), and a four-button
touch pad User Interface (UI) that allow you to set up
custom System 450 control systems.
The C450RBN-1 and C450RBN-3 model provide one SPDT
relay.
The C450RCN-1 and C450RCN-3 model provide two SPDT
relays.
Refer to the
System 450 Series Modular Control Systems with
Reset Control Modules Technical Bulletin (LIT-12011842)
for
more detailed information on designing, installing, setting
up, and troubleshooting System 450 Series components
and control systems.
Figure 1: System 450 Module dimensions, mm
Installation
Observe the following System 450 location guidelines:
• Ensure that the mounting surface can support the
module assembly, mounting hardware, and any (user-
supplied) panel or enclosure.
• Mount the modules upright and plugged together in
a horizontal row where possible (Figure 3). DIN rail
mounting is highly recommended.
• Mount modules on flat, even surfaces.
• Allow sufficient space for wires and connections.
• Mount the modules in locations free of corrosive vapors
and observe the ambient operating conditions in the
System 450 Series Reset Control Modules with Real-
Time Clock and Relay Output technical specifications
.
• Do not mount the modules on surfaces that are prone
to vibration or in locations where radio frequency or
electromagnetic emissions may cause interference.
• Do not install the modules in airtight enclosures.
• Do not install heat-generating devices in an enclosure
with the modules that may cause the temperature to
exceed the ambient operating limit.
Part No. 24-7664-2888 Rev. E
2020-04-01
C450RBN, C450RCN
