Liebert Switch AC8 User Manual

AC8  
Product Specification/Installation Sheet  
Description  
The Liebert AC8 is ideal for coordinated control of systems  
with redundant equipment, such as multiple environmental  
units or pumps. When the AC8 controller detects an alarm in  
an operating device, the AC8 enables a standby device and  
controls the device in alarm as configured, either leaving that  
device operating or disabling it.  
The AC8 controller can also balance usage of devices by  
rotating units through Operating and Standby modes  
according to a user-defined schedule. This helps keep  
redundant equipment operating efficiently and only when  
needed. The AC8 can perform routine testing of standby  
devices and alert personnel if a standby device fails an  
operating test and requires attention.  
The staging feature permits standby devices to be turned on  
or off when a sensor detects specified levels. For example, the  
AC8 might be configured to turn on a fan when the  
temperature reaches 75°F, then turn on a second fan at 80°F.  
When the temperature falls below 80°F, the second fan is turned off; when it drops below 75°F,  
the first fan is turned off. Liebert’s TW420 Temperature Transmitter may be connected to any of  
the four analog sensor inputs for staging and other functions.  
Another capability of the AC8 is monitoring the status of connected devices and keeping  
personnel apprised through local alarming. The AC8 employs local alarming and remote paging  
services to keep personnel on-site and at remote locations apprised of the status of equipment.  
The AC8 controller can interface with  
anything that closes an electrical contact.  
To improve process efficiency and  
Features and Benefits  
• Custom configuration for specific applications  
• Paging capability—up to four pager numbers  
• Preconfigured on-board modem  
troubleshooting, the controller tracks data  
in three types of logs: alarm, event and  
trend.  
The AC8 has both a local LCD interface  
and a remote dial-up interface for  
configuration and monitoring. Liebert’s  
SiteScan Web may also be used for  
monitoring, as well as some configuration  
functions.  
• Alarm, Event and Trend logs with time and  
date stamp  
• Battery backup to ensure alarm notification  
• Backup and download configuration files  
• User interface via RS232 or modem connection  
• On-board audible alarm  
When an alarm condition arises, the AC8  
displays alarm information, sounds an  
audible alarm, changes the state of the  
common alarm relay and turns connected  
devices on or off according to user  
configuration. If configured, the controller  
also sends pager notifications.  
• Configuration data permanently stored in non-  
volatile Electrically Erasable Programmable  
Read Only Memory (EEPROM) for protection  
against power loss  
• Real-time clock  
For other applications, contact your local  
Liebert representative or call  
1-800-222-5877.  
• Status LEDs for verification and diagnostics  
1
 
Dimensions - Enclosure and Transformer Modules  
18"  
(457.2mm)  
ENCLOSURE  
TRANSFORMER MODULES (115V & 230V)  
Front  
view  
Front  
view  
14"  
(355.6mm)  
18"  
(457.2mm)  
3.83"  
(97.2mm)  
2.85"  
(72.39mm)  
Top/bottom  
view  
Top/bottom  
view  
2.65"  
(67.3mm)  
Wiring Specifications  
Connection  
Supported Wire Type  
Maximum Wire Length  
Rating  
18-22 AWG Stranded & Unshielded  
18 AWG* (recommended)  
Non Plenum - Belden 9740  
Plenum - Belden 89740  
Digital  
Input/  
EPOP  
Dry Contact  
(24VDC,  
10 mA)  
750 ft. (225m)  
18 AWG*  
20 AWG  
22 AWG  
Digital  
Output/  
Control  
Relay  
18-22 AWG Stranded & Unshielded  
18 AWG* (recommended)  
Non Plenum - Belden 9740  
Plenum - Belden 89740  
(recommended)  
24VAC@3A  
@3A 50 ft. (15m)  
@3A 40 ft. (12m)  
@3A 25 ft. (7m)  
@2A 35 ft. (10m)  
@2A 100 ft. (30m) @2A 60 ft. (18m)  
@1A 200 ft. (60m) @1A 100 ft. (30m) @1A 75 ft. (23m)  
18-22 AWG Stranded & Unshielded  
18 AWG* (recommended)  
Non Plenum - Belden 9740  
Plenum - Belden 89740  
4-20 mA Signal  
Input Selectable  
Power Source  
(12/24VDC)  
Analog Input  
2-Wire  
Transducer  
750 ft. (225m)  
18-22 AWG Stranded & Unshielded  
18 AWG* (recommended)  
Non Plenum - Belden 8489  
Plenum - Belden 88489  
4-20 mA Signal  
Input Selectable  
Power Source  
(12/24VDC)  
Analog Input  
4-Wire  
Transducer  
750 ft. (225m)  
18 AWG*  
20 AWG  
22 AWG  
18-22 AWG Stranded & Unshielded  
18 AWG* (recommended)  
Non Plenum - Belden 9740  
Plenum - Belden 89740  
(recommended)  
Common  
Alarm  
Output  
24VAC  
@3A  
@3A 50 ft. (15m)  
@3A 40 ft. (12m)  
@3A 25 ft. (7m)  
@2A 35 ft. (10m)  
@2A 100 ft. (30m) @2A 60 ft. (18m)  
@1A 200 ft. (60m) @1A 100 ft. (30m) @1A 75 ft. (23m)  
Communication  
RS232  
Null Modem Cable  
50 ft. (15m)  
N/A  
N/A  
18-22 AWG Stranded & Shielded  
22 AWG* (recommended)  
Non Plenum - Belden 9461  
Plenum - Belden 88761  
Communication  
EIA422  
1000 ft. (300m)  
SiteScan  
18-22 AWG Stranded & Shielded  
22 AWG* (recommended)  
Non Plenum - Belden 9461  
Plenum - Belden 88761  
Communication  
EIA485  
3000 ft. (900m)  
N/A  
N/A  
N/A  
Phone/Modem  
Line  
4 Wire (Pins 3 & 4)  
RJ11 Connector  
18-22 AWG Stranded & Shielded  
18 AWG* (recommended)  
Non Plenum - Belden 8770  
Plenum - Belden 88770  
24VAC Power  
Connection  
(TB7)  
24VAC  
@1.3A  
150 ft. (45m)  
Power Connections (Transformer Module)  
14 AWG Stranded & Unshielded  
115VAC  
115VAC  
@4A  
150 ft. (45m)  
150 ft. (45m)  
Non Plenum - Belden 5101UE  
14 AWG Stranded & Unshielded  
230VAC  
230VAC  
@0.5A  
Non Plenum - Belden 5101UE  
* Recommended  
3
 
AC8 Specifications  
Power  
Requirements  
115VAC Transformer Module / UML11500  
230VAC Transformer Module / UML23000  
115VAC ±10% of nominal; 60Hz, 4A, 460VA 230VAC ±10% of nominal; 50Hz, 0.5A, 115VA  
Dimensions: W x D x H, in. (mm)  
Weight (Assembled)  
Enclosure Type  
18 x 2-3/4 x 18 (457.2 x 69.85 x 457.2)  
20.56 lb. (9.33 kg)  
NEMA 1  
Liquid Crystal Display (LCD)  
Mounting Surface  
Ambient Operating Environment  
Processor Specifics  
Model  
Four line, 20 character, backlit  
Building Wall or Structural Member  
32ºF to 104ºF (0ºC to 40ºC) 0% RH to 95% RH (non-condensing)  
Motorola XC68HC812A4  
Clock speed  
16MHz  
256Kb  
Total RAM  
Total FLASH  
4M  
Total EEPROM  
4K  
A/D Resolution (Analog IN)  
Modem Type Embedded  
Clock Type  
12 Bit  
14.4K bps  
Real-Time Clock  
Lithium Cell (non-replaceable)  
7 years, constant, no power  
Nickel Cadmium (replaceable)  
10 minutes at full load  
Clock battery backup type  
Clock battery life  
Modem battery backup type  
Modem battery life  
Communications  
Local Communications  
RS232  
Remote: Modem (9600-N-8-1)  
Remote: Supported pagers  
Baud rate 9600 bps, Parity=None, Data bits=8, Stop bits=1  
9600 E-7-1 supports TAPI protocol version 1.8  
SiteScan Web  
Agency Listings  
UL  
IGM Protocol, EIA422  
115VAC Transformer Module (TM115)  
230VAC Transformer Module (TM230)  
UL1012  
UL1585  
CSA  
C22.2 No. 66 and C22.2 No. 107.1  
CE  
Yes  
N/A  
FCC Compliance  
Inputs & Outputs (Quantity)  
Digital Inputs (8)  
Analog Inputs (4)  
Digital Outputs (8)  
Common Alarm Outputs (2)  
Dry Contact Closure 24VDC, 10 mA  
4-20 mA signal input with selectable power source of 12VDC or 24VDC  
24VAC, 3A  
24VAC, 3A  
Ordering Information  
Quantity  
Part #  
Description  
AC8 controller board & Transformer Module 115VAC with two 24VAC outputs (40VA each) and 115VAC  
receptacle in enclosure  
AC8L115  
AC8L230  
AC8 controller board & Transformer Module 230VAC with two 24VAC outputs (40VA each) in enclosure  
201258P1 RS232 configuration cable  
TW420 Temperature Transmitter Wall 4-20 mA @ 45°F to 96°F  
Liebert Corporation  
1050 Dearborn Drive  
P.O. Box 29186  
Columbus, OH 43229  
Telephone: 1-800-877-9222  
Facsimile: 1-614-841-6022  
© 2005 Liebert Corporation  
® Liebert and the Liebert logo are registered trademarks of  
All rights reserved throughout the world. Specifications subject Liebert Corporation. All names referred to are trademarks or  
to change without notice.  
registered trademarks of their respective owners.  
SL-31101 (12/05) Rev. 0  
4
 

Lennox International Inc Furnace GSR21Q User Manual
Lenovo Computer Monitor 2580AF1 User Manual
Life Fitness Treadmill 97Ti User Manual
Lindy Computer Accessories 42791 User Manual
Linksys IP Phone CIT200 User Manual
Loewe Car Satellite TV System 32 User Manual
Makita Edger RBE250 User Manual
Martin Audio Portable Speaker W8LCD User Manual
M Audio Speaker BX5 User Manual
Midland Radio Marine Radio 70 440BP User Manual