Operating instructions

Installation 13
For alarm annunciation with Precision Power Centers, it is recommended that the N.O.
summary alarm contact and N.C. auto transfer enable contact be connected to two of the Precision
Power Center PMP N.O. customer alarm inputs (Precision Power Center control terminals 9 and
10, 9 and 11, 9 and 12, or 9 and 13) to alarm when the
Static Switch has an alarm condition (summary alarm) and when the Static Switch is not able to
make an automatic transfer (such as when one of the input sources is not available, the two input
sources are not synchronized, there is a switch failure, etc.). Be sure to program customer alarm
messages for these two contacts, such as “STATIC SWITCH ALARM” and “STS XFER INHIBIT.”
For modem and remote monitoring information, refer to 2.7 - Communication Interfaces.
For Customer Alarm Interface and Remote Source Selection information, refer to Cus-
tomer Alarm Interface/Remote Source Select in 2.0 - Operating Instructions.
Figure 9 Typical Control Wiring Connections
Static Transfer Switch Control Connections
(Located Behind Mimic Panel)
Isolated Relay Output Contacts
1 3 5 7 9 11131517192123252729313335373941434547
K8K7K6K5K4K3K2K1
Summary
Alarm
Auto Xfr
Enabled
Source 1
Available
Source 2
Available
In Sync
STS on
Source 2
STS on
Source 1
STS
Overload
1
2
3
4
5
6
7
8
9
10
11
12
13
14
16
15
TXD
RXD
GROUND
DCD
TXC
RXD
GROUND
TXD
GROUND
RS-232
PORT
(Full Duplex)
MODEM
PORT
RS-232
PORT
(Simplex)
RS232 / Terminal
Communication Ports
12
SiteScan Interface
(RS422)
To SiteScan
Twisted Pair
#22 AWG Min.
SiteScan
Communication Port
1
2
3
4
5
6
7
8
9
10
TB1
1
2
3
4
5
6
TB2
7
Alarm
Interface
Board
Dry Contacts
(By Others)
Remote Source Select /
Customer Alarm Inputs
S2 Preferred
S1 Preferred
Optional
Customer
Alarm
Inputs
#1
#2
#3
#4
#5
#6
#7
#8