Page 1
Specification for SiteLink-12
DESCRIPTION: The SiteLink-12 is a 32-bit microprocessor-based communications device that provides
an interface for up to twelve Liebert Unit Controllers (IGM’s). The SiteLink-12 communicates to either the
SiteScan Monitoring System, or a third party software program utilizing a designated open standard
protocol (i.e. Modbus or BACnet). This device communicates to the SiteScan Monitoring System via a
twisted pair called the ARC156 network through an EIA-485 port at either 156K / 9600 or 38.4kbps baud.
It communicates to the third party software monitoring system via a 9-pin DTE male EIA-232 connector
(Portal Interface) or at the 5 pin EIA485 port communicating at either 9600bps or 38.4kbps baud. Twelve
EIA-422 ports are provided to connect Liebert Information Gathering Modules.
DIMENSIONS: Module: 7 1/2" H x 11 1/4" W
19.05cm H x 28.58cm W
Enclosure: 12”H x 14.25" W x 2.85" D
(Painted steel) 419.1mm x 301.3mm x 78.6mm
See Enclosure Diagrams for mounting options.
POWER: 24VAC ± 10%, 50-60 Hz, 7.2VA power consumption.
(120/24VAC 40VA Transformer available)
ENVIRONMENTAL
OPERATING RANGE: 0° to 130° F (-17.8° to 54.4° C), 10 to 90% relative humidity, non-condensing
COMMUNICATION: CMnet EIA-485 Port - Control Module network screw terminals
Switch selectable baud rates ARC156 / 9600 or 38.4bps
Recommended wire is: MAGNUM Cable pn A3-ARC-156-2
Two (2) Portal Interface – One EIA-232, One EIA-485 2 / 4 wire (for Third Party
software selectable baud rate, 9600bps or 38.4kbps
One (1) Access port (for diagnostics)
Twelve (12) EIA-422 Ports (for Liebert unit connection) - screw terminal
MEMORY: 1024 kB Flash memory and 1024 kB non-volatile battery-backed RAM.
PROTECTION: Voltage, current, and ESD protection on incoming power and ARC156 network
BATTERY: Seven-year lithium battery provides a minimum or 10,000 hours or data
retention during power outages.
Liebert Corporation Page 1 of 5 SL-27216 Rev. 4; 7/03
Page 2
Specification for SiteLink-12
LISTED: UL 916 (PAZX), cUL C22.2 No. 205-M1983 (PAZX7), FCC Part 15 – Subpart B
- Class A.
DIAGNOSTIC LED's:
Power: lights when power is being supplied to the module.
Run: flashes to indicate a normal condition
Error: lights when an error is detected
CMnet Transmit: lights when the SiteLink-12 transmits data over the ARC156 network
CMnet Receive: lights when the SiteLink-12 receives data from the ARC156 network
Port A Transmit: lights when the SiteLink-12 transmits data over Port A
Port A Receive: lights when the SiteLink-12 receives data from Port A
Port B Transmit: lights when the SiteLink-12 transmits data over Port B
Port B Receive: lights when the SiteLink-12 receives data from Port B
Unit (IGM Port) Transmit: lights when the SiteLink-12 transmits data over an IGM port
Unit (IGM Port) Receive: lights when the SiteLink-12 receives data from an IGM port
1"
2.54cm
Port A
Configuration
Jumpers
Port A
Port B
LEDs
2wire 4wire
Tx +
Net+
Tx -Net-
n/c
Rx +
n/c
Rx -
Signal
Ground
OpenProtocol
Commun ications
Port B
Run
Error
CMnet receive
CMnet transmit
PortA receive
PortA transmit
PortBreceive
Port B trans mit
Aux1
Aux2
Unit 1
+
EIA-232
RxTx
n/c
485-2w
485-4w
EIA-232
EIA-485
DTR
DCD
-
Tx
Rx
Communications
PortA
Unit 2
Tx-Rx
+
Unit3
Tx-Rx
+
ToRe duce
TheRisk of
Fire or Elec tric
Shock,
Do Not
Interconnect
the Outputs of
DifferentClass
2Circuits
Tx-Rx
Format
Button
Options
Unit 4
+
Rotary Address
Switches
10's 1's
Format
Module
Address
SiteLink-12
Liebert
OpenE nergy
Management Eq uipment
R
88FO
E143900
TYPE: 003212
Unit 5
Unit 6
Unit 7
Rx
Tx-Rx
Tx
-
+
Tx
+
+
11 1/4"
28.58cm
Rx
Power
Switch
Gnd and
24VAC
Class 2
12VA, 0.5A
Use Copper
Auxiliary
Device
Port
Shield
Access
Port
Ground
24 Vac
On
Off
Terminals
Keypad/
Display Port
Net -
Net +
CMnet Port
71/2"
19.05cm
Access Port
Power
24Vac, 50-60 Hz
Conductors On ly
TM
CMnet
ARC156K
9600/38.4K
CMnet Baud
Rate Jumper
Unit 8
Unit 9
Unit 10
Unit 11
Unit 12
Tx-Rx
+
Rx
Tx-Rx
Tx
+
Tx-Rx
-
+
+
Tx-Rx
-
+
MODULE DIMENSIONS AND LAYOUT
Liebert Corporation Page 2 of 5 SL-27216 Rev. 4; 7/03
Page 3
Specification for SiteLink-12
COMMUNICATIONS WIRING DIAGRAM
C M n e t
S h i eld
N
e t
N e t
-
+
Net -
Ne t +
18-24 ga Twisted - Pair, Shielded,
Low Impedance, Low Capacitanc
Recommended wire is:
Magnum Cable A3-ARC-156-2
ENCLOSURE DIMENSIONS
e
Liebert Corporation Page 3 of 5 SL-27216
Rev. 4; 7/03
Page 4
Specification for SiteLink-12
Enclosure Wall Mounting
Liebert Corporation Page 4 of 5 SL-27216
Rev. 4; 7/03 Rev. 4; 7/03
Page 5
Specification for SiteLink-12
Enclosure Floor Mounting
Liebert Corporation Page 5 of 5 SL-27216
Rev. 4; 7/03 Rev. 4; 7/03
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