Table of Contents
Advertisement
Installation, Operation and Technical Manual
4.3 MUIB - Mini User Interface Board
Connections between the MCSU-4, the external transducers and other inputs are made
using the connectors provided on the MUIB.
contacts, battery and ambient temperature sensors, two battery current transducers, LVDS
control and circuit breaker operation detection using the breaker auxiliary contacts for both
the battery and load circuit breakers.
4.3.1 MUIB Connections
4.3.1.1 Relay Contact Outputs
There are 5 relays with normally open (N/O) and normally closed (N/C) contacts available
on the MUIB, connector X2 (see Figure 4.3). In standard RTP system three of the relays
are for remote annunciation of alarms: Relay 3 - HVSD, Relay 4 – any system alarm,
Relay 5 - SMR shut down.
Other two relays are used for control of optional external equipment.
Relay 2 is programmed for FAN CONTROL. If any one of the SMR heat-sink temperatures
exceeds a pre-set (non-programmable) value, the relay closes. The relay closure can then
be used to either speed up fans, which may normally be idling at low speed, or it can turn
on fans, which may normally be off.
In 110V systems Relay 1 closes during battery discharge test, allowing control of dummy
load on standby systems. In 24V and 48V systems it has no assigned function.
If MCSU-4 supports User Programmable Relays, the functions described above can be
changed on site according to specification of the installation (for details see paragraph
"User programmable relay functions" in chapter "Operation"). It is also possible to
permanently assign different functions to the relays on end user request by modifying
controller software.
4.3.1.2 Spare Digital and Analog Inputs
There are 4 spare digital inputs (USER 1, 2, 3, 4) available on the MUIB for the monitoring
of external plant associated with the power supply. The inputs must be isolated relay
contacts or auxiliary contacts, which are either normally open or normally closed.
There is also provision for monitoring two external analog levels via connectors X28 (AN1)
and X31 (AN2) on the MUIB. The analog signals must be in the range 0 to +5VDC.
To use the spare analog or digital inputs the software for the MCSU-4 must be individually
programmed by the manufacturer according to the requirements of the application.
4.3.1.3 Battery Current Transducer Input
Battery current transducers are connected to X39 and X40 of the MUIB. Figure 4.2 shows
the pin connections for the battery transducer connector going onto the MUIB.
158-1872-01
Terminals are provided for alarm relay
12
Rectifier Technologies
19-Feb-14
Hide quick links:
Advertisement
Table of Contents
