Vertiv Liebert AC8 User manual

LIEBERT® AC8TM
Product Specication/Installation Guide
590-1661-501A/SL-31101_REV2_7-17 1
Liebert AC8TM
The Liebert AC8 coordinates
control of systems with redundant
equipment, such as multiple
thermal-management units or
pumps. The AC8 can control
stand-by functions and unit
rotation, perform testing on
stand-by devices, stage operation
based on sensor-reading levels,
and monitor alarm status of
connected devices. The Liebert
AC8 interfaces with any device
that closes an electrical contact.
The AC8 tracks data in alarm,
event, and trend logs. System
configuration and data monitoring
is accessible using a local, LCD
interface and a remote dial-up
interface. The AC8 also interfaces
with Liebert’s SiteScan® Web
monitoring product.
FEATURES
• Custom configuration for
specific applications
• Paging capability—up to 4
contact numbers
• Preconfigured, on-board
modem
• Alarm, Event and Trend logs
with time-and-date stamp
• Battery back-up to ensure
alarm notification
• Back-up and download
configuration files
• User interface via RS232 or
modem connection
• On-board audible alarm
• Configuration data and
operating program
permanently stored in
nonvolatile Electrically
Erasable Programmable Read
Only Memory (EEPROM) for
protection against power loss
• Real-time clock
• Status LEDs for verification
and diagnostics
AC8 Enclosure
The AC8 enclosure includes a key
lock for added security, is made of
metal to protect from
environmental exposure, and
includes top and bottom access
slots for cables and wiring.

LIEBERT® AC8TM
Product Specication/Installation Guide
2590-1661-501A/SL-31101_REV2_7-17
ENCLOSURE
FRONT VIEW
Controller Input and Output
The controller supports the
following connections:
• 8 devices with 1 digital input
and 1 digital output per device
• 4 zones with staging for each
zone
• 4 analog inputs, 4-20 mA, one
sensor per zone
• 2 programmable, digital-relay
outputs
• 2 common-alarm outputs
• 1 EPOP inout
Digital inputs are dry contacts.
Analog inputs are 4-20 mA. Digital
outputs, programmable-relay
outputs, and common-alarm
outputs are Form C contact relays.
The common-alarm output is one
output with two sets of contacts.
Point terminations on the control
board are made using removable
terminal blocks. The board
includes RS232, RJ11, and IGM 422
ports/connections.
Keypad Display
The AC8 user interface is a
password-protected LCD display
with a keypad providing stand-
alone configuration and monitoring
from the controller.
115-V and 230-V
TRANSFORMER MODULE
FRONT VIEW
18”
(457.2mm)
18”
(457.2mm)
2.85”
(72.39mm)
TOP/BOTTOM VIEW
3.83”
(97.2mm)
14”
(355.6mm)
2.65”
(67.3mm)
BOTTOM VIEW
DIMENSIONS -
FRONT, TOP/BOTTOM

LIEBERT® AC8TM
Product Specication/Installation Guide
590-1661-501A/SL-31101_REV2_7-17 3
WIRING SPECIFICATIONS
CONNECTION MAXIMUM LENGTH, ft (m) RATING SUPPORTED TYPE
Digital Input/
EPOP 750 (225) Dry-contact, 24 VDC, 10 mA
18 – 22 AWG
stranded, unshielded
(18 AWG recommended)
Non-plenum: Belden 9740
Plenum: Belden 89740
Analog Input
2-wire transducer 750 (225)
4-20 mA signal input,
selectable power
source, 12/24 VDC
Digital Output/
Control Relay 8 AWG @3 A: 50 (15), @2 A: 100 (30), @1 A: 200
20 AWG @3 A: 40 (12), @2 A: 60 (18), @1 A: 100 (30)
22 AWG @3 A: 25 (7), @2 A: 35 (10), @1 A: 74 (23)
24 VAC @ 3 A
Common Alarm
Output
Analog Input
4-wire transducer 750 (225)
4-20 mA signal
input, selectable
power source,
12/24 VDC
18 – 22 AWG
stranded, unshielded
(18 AWG recommended)
Non-plenum: Belden 8489
Plenum: Belden 88489
Communication
IGM422 SiteScan 1,000 (300) N/A 18 – 22 AWG
stranded, unshielded
(18 AWG recommended)
Non-plenum: Belden 9461
Plenum: Belden 88761
Communication
EIA485 3,000 (900) N/A
Communication
RS232 50 (15) N/A Null modem cable
24-VAC Power
(TB7) 150 (45) N/A
18 – 22 AWG
stranded, unshielded
(18 AWG recommended)
Non-plenum: Belden 8770
Plenum: Belden 88770
TRANSFORMER MODULE WIRING SPECIFICATIONS
115 VAC Power 150 (45) 115 VAC @ 5 A 14 AWG
stranded, unshielded
Non-plenum: Belden
5101UE
230 VAC Power 150 (45) 230 VAC @ 0.5 A
INPUT AND OUTPUT
(Quantity in
parentheses)
115‑VAC TRANSFORMER/UML11500 / 230‑VAC TRANSFORMER/UML23000
Digital Inputs (8) dry-contact closures, 24 VDC, 10 mA
Analog Inputs (4) 4-20 mA signal with selectable power source of 12 VDC or 24 VDC
Digital Outputs (8) 24-VAC, 3-A
Common Alarm
Outputs (2) 24-VAC, 3-A

LIEBERT® AC8TM
Product Specication/Installation Guide
To contact Vertiv Technical Support: visit www.VertivCo.com
© 2017 Vertiv Co. All rights reserved. Vertiv, the Vertiv logo are trademarks or registered trademarks of Vertiv Co. All other names and logos referred to are trade names,
trademarks or registered trademarks of their respective owners. While every precaution has been taken to ensure accuracy and completeness herein, Vertiv Co. assumes no
responsibility, and disclaims all liability, for damages resulting from use of this information or for any errors or omissions. Specications are subject to change without notice.
4 590-1661-501A/SL-31101_REV2_7-17
SPECIFICATIONS
115‑VAC TRANSFORMER/UML11500 230‑VAC TRANSFORMER/UML23000
Power Requirements 115 VAC ±10% of nominal,
60 Hz, 4 A, 4600 VA
230 VAC ±10% of nominal,
50 Hz, 0.5 A, 115 VA
Dimensions, W x D x H 18 x 2-34 x 18 in.
Weight (assembled) 20.56 lb (9.33 kg)
Enclosure Type NEMA 1
Liquid-crystal Display 4-line, 20-character, backlit
Mounting Surface Building wall or structural member
Ambient Operating Environment 32 to 104°F (0 to 40°C) / 0% to 95% RH, non-condensing
PROCESSOR
Model Motorola XC68HC812A4
Clock Speed 16 MHz
Total RAM 256 Kb
Total FLASH 4 M
Total EEPROM 4 K
A/D Resolution (Analog IN) 12 bit
Modem Type Embedded 14.4 K bps
Clo ck Type Real-time
Clock Battery back-up type Lithium (non-replaceable)
Clock Battery life 7 years, constant, no power
Modem Battery back-up type Nickel Cadmium (replaceable)
Modem Battery life 10 minutes at full load
COMMUNICATION
Local EIA232
Remote: Modem Baud rate: 9600 bps, Parity = None, Data bits = 8, Stop bits = 1
Remote: Support pagers 9600 E-7-1 supports TAPI protocol version 1.8
SiteScan Web IGM protocol, EIA422
AGENCY LISTINGS
UL TM115 Transformer: UL 1012 TM230 Transformer: UL 1585
CSA C22.2 No. 66 and C22.2 No 107.1
CE Yes
FCC Compliance Yes