Relay Interface Pcb Cs0082; Epo Connections; Optional Second Relay Interface Pcb - Powertronix Quasar Service Manual

Chapter 5 - Functional description

Relay Interface PCB CS0082

5.6 - Relay Interface PCB CS0082
The relay interface PCB provides two sets of volt free contacts rated at 50V 1A which enable the UPS
functions listed below in
status signals from the Display Control Logic PCB Part Nº CS0073 and is connected to CN1.
Output signals from the relay interface are used for the control of customer peripheral computer equip
ment and connections are made to the terminal block M1 shown in
connector P1 (fitted to later equipment only).
Table 5-1 Relay Interface PCB Output
Links fitted to the PCB allow the input mains status to be set and the serial port P1 to be enabled as shown
in
PCB at connector CN4.
Table 5-2 Serial Port P1 DB9 Connector Connections

5.6.1 - EPO Connections.

Provision has been made on the relay interface PCB to connect an external `Emergency Power Off'
switch, to allow remote shut down of the UPS to be implemented.
Connection for the EPO is provided by the terminal block M2.
Caution
When connecting an EPO switch to the relay PCB the Link JP6 must be opened.

5.6.2 - Optional Second Relay Interface PCB

If a second set of outputs is required, an optional relay interface PCB can be connected to CN3 on the
display control logic PCB.
Caution
With two relay PCB's connected. Link JP1 on the display logic PCB must be opened in
addition to JP6 on the optional relay PCB, to allow the use of a Second EPO switch.
5 - 6
Table 5-1
Relay Relay UPS Function UPS Function
RL1 RL1 MAINS STATUS MAINS STATUS
RL2 BY PASS ON
RL3 UPS RUN
RL4 PRE ALARM
Table 5-2. These signals are generated on the display control logic PCB and connected to the relay
Pin Pin
F nction Function
Nº
5 COMMON
3 UPS RX
2 UPS TX
8 MAINS
9 STATUS
1
PRE ALARM
7
to be monitored externally. The relay interface PCB receives the UPS
Signal Function Signal Function
Mains NOT OK
Mains OK
Relay Rela
JP1 JP2
N/A Closed
N/A Closed
N/A
RL1
RL4
3x3 UPS Functional description
Service Manual
Figure 5 2, or from the RS232 DB9
Link
JP4
Closed
Open
No associated link No associated link
Link
JP3 JP4
Closed
Mains
NOK
Issue 2 - November 2001
JP5
Open
Closed
JP5
Mains OK