Operating instructions

18 Options
6.0 OPTIONS
This section discusses the options available for the STS2. The communications options are also dis-
cussed in 12.0 - Communication Interfaces on page 70.
6.1 Programmable Relay Board
The Programmable Relay Board (PRB) provides a means to trigger an external device when an
event occurs in the STS2. Each PRB has 8 channels. Each channel has two sets of Form-C dry con-
tacts, rated 1 Amp @ 30 VDC or 250 mAmp @ 125 VAC.
Any alarm/event can be programmed to any channel or channels. Up to ten (10) events can be pro-
grammed to a relay. If multiple events are grouped to one relay, group the events logically to sim-
plify troubleshooting when an event is triggered. The same alarm/event can be programmed to
more than one channel. Up to two Programmable Relay Boards can be installed in the STS2 for a
total of 16 channels. Programming is performed through the touch screen display.
See Configuring the Programmable Relay Board Settings on page 91 for default settings
and instructions for reconfiguring the relays. See Figure 21 on page 39 and Figure 22 on page 40
for the location of the PRB. See Figure 24 on page 42 for wiring details. Table 8 provides the PRB
pinout.
!
WARNING
ALL OPTIONS MUST BE INSTALLED BY LIEBERT GLOBAL
SERVICES OR LIEBERT FACTORY-AUTHORIZED SERVICE
PROVIDED BY A LIEBERT DISTRIBUTOR. THE OPTION AREA
AND CUSTOMER CONTROL CABLE AREA CONTAIN
HAZARDOUS VOLTAGES IF ANY OF THE INPUT SOURCES ARE
ON, EVEN WHEN THE UNIT IS IN BYPASS. TURN ALL POWER
SOURCES OFF BEFORE INSTALLING CUSTOMER CONTROL
CABLES TO ANY OPTION.
Table 8 Programmable Relay Board Pinout
Channel Pin No. C N.C. N.O.
TB1
CH1
A1-3 1 2 3
B4-6 4 5 6
CH2
A7-9 7 8 9
B 10-12 10 11 12
CH3
A 13-15 13 14 15
TB2
B1-3 1 2 3
CH4
A4-6 4 5 6
B7-9 7 8 9
CH5
A 10-12 10 11 12
B 13-15 13 14 15
TB3
CH6
A1-3 1 2 3
B4-6 4 5 6
CH7
A7-9 7 8 9
B 10-12 10 11 12
CH8
A 13-15 13 14 15
TB4 B1-3 1 2 3
Key: N.O. = Normally Open; N/C. = Normally Closed; C = Common
Note: Pin 16 not used on TB1, TB2, and TB3.