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Power Control Interface: CNPCI-8

 

Specifications 

Introduction 

Following are specifications for the CNPCI-8. 

Features and Functions 

CNPCI-8 Specifications 

SPECIFICATION DETAILS 

Power Requirements 

8 Watts (0.33 A @ 24 VDC) 

Default NET ID 

11 

Closure Rating 

20 A @ 277 VAC,  
1 HP @ 125 VAC 
15 A @ 125 VAC (Tungsten) 

Control System Update File

1,2 

   2-Series Control System 
   CEN/CN-TVAV 
   CNMSX-AV/PRO 
   CNRACKX/-DP 
   ST-CP 

 
Version C2-2.000.CUZ or later 
Version 5.10.13V.UPZ or later 
Version 5.01.35X.UPZ or later 
Version 5.01.35W.UPZ or later 
Version 4.02.04S.UPZ or later 

Operating Temperature and 
Humidity 

0°C to 40°C (32°F to 104°F) 
10 to 90% Relative Humidity 
(Non-Condensing) 

Dimensions and Weight 

Height: 15.0 in (38.1 cm) 
Width: 8.0 in (20.3 cm) 
Depth: 2.5 in (6.4 cm) 
Weight: 7.2 lbs (3.3 kg) 

The CNPCI-8, Power Control Interface, is an interface 
that reports to a Crestron

®

 control processor over the 

Cresnet

®

 system. The CNPCI-8 provides eight single 

pole, single throw relays, each rated up to 20A for 
lighting, motor control etc.; 120/277 VAC. Each relay is 
normally open and can be controlled via software 
programming.  

Physical Description 

The CNPCI-8 comes in a surface-mount NEMA-type 
steel enclosure. The CNPCI-8 has a 9-pin connector for 
attaching eight local inputs.  

Operation 

Providing a closure from ground (G input pin) to any of 
the input pins 1-8 provides an input to the Cresnet system. 
These inputs can be programmed to control the CNPCI-8 
relays and/or other control system functions. A SIMPL 
signal, which is driven by a local input, remains high for 
as long as the closure to ground exists on the 
corresponding input pin.  

1. 

The latest versions can be obtained from the Downloads | Software 
Updates section of the Crestron website (www.crestron.com). 
Refer to NOTE below. 

2. 

Crestron 2-Series control systems include the AV2 and PRO2. 
Consult the latest Crestron Product Catalog for a complete list of 
2-Series control systems. 

When the signal driving a relay goes high, the 
corresponding relay activates. The relay remains 
energized as long as its driving signal is high. When the 
driving signal goes low, the relay is deactivated.  

NOTE:

  Crestron software and any files on the website 

are for Authorized Crestron dealers and Crestron 
Authorized Independent Programmers (CAIP) only. New 
users may be required to register to obtain access to 
certain areas of the site (including the FTP site). 

If the data wires from the control system are 
disconnected, but the CNPCI-8 remains connected to a 
Crestron power supply and receives 24 volts, the relays of 
the CNPCI-8 may still be operated from the local control 
inputs. In this mode, each momentary closure on an input 
alternatively latches and unlatches the corresponding 
relay.  

Setup 

The 4-pin connector marked NET should be wired to the 
Cresnet system. Network termination points are available 
at the control system or power supply. Network units may 
be daisy-chained together. Refer to the latest revision of 
the wiring diagram appropriate for your specific system 
configuration, available from the Downloads | Product 
Manuals | Wiring Diagrams section of the Crestron 
website (

www.crestron.com

).  

Identity Code 

All equipment and user interfaces within Cresnet require a 
unique identity code (Net ID). These codes are two-digit 
hexadecimal numbers from 03 to FE. The Net ID of each 
unit must match an ID code specified in the SIMPL 
Windows program.  

The CNPCI-8 has an indicator marked NET POWER. 
This indicator illuminates when 24 volts is supplied to the 
unit over Cresnet. The indicator marked ID SELECT 
illuminates when communication between the Cresnet 
system and the CNPCI-8 is established (unit is polled on 
the network). Illumination indicates that the SIMPL 
Windows program currently loaded has a network device 
defined at the same Net ID as the CNPCI-8.  

To set the Net ID, locate two miniature rotary switches, 
identified as H and L. These 16-position hexadecimal 
switches can be set to 0 through F. Using a small 
screwdriver, rotate the arrow in the center of the switch 
marked H to point to the first (or most-significant) digit of 
the specified Net ID. Set the switch marked L to the 
second (least-significant) digit of the specified Net ID.  

Crestron Electronics, Inc.

 

Operations Guide – DOC. 8028C

 

15 Volvo Drive   Rockleigh, NJ 07647

 

03.04

   

Tel: 888.CRESTRON

 

 

Fax: 201.767.7576

  

Specifications subject to 

 

www.crestron.com

 

change without notice.

 

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