Rnd-2 System Description; Power Supply - Faraday MPC-6000 Installation, Operation And Maintenance Manual

MPC-6000 / MPC-7000 / RND-2 INSTALLATION, OPERATION AND MAINTENANCE MANUAL

RND-2 SYSTEM DESCRIPTION

The RND-2 is a Remote Network Display designed to connect to a Faraday MPC-NET2
Network. It features advanced programming, and memory capability. Its base configuration
includes a power supply, serial interface circuit, four status relays and a programming port.
In a system with multiple panels connected via the MPC-NET2, the RND is used to
Acknowledge, Silence and Reset the total system.
The RND-2 Network annunciator mounts in a 22" x 18" backbox with overall cover size of 22-
9/32" x 18-3/8". Operating controls and indicators are mounted on the inside hinged plate. An
80 (4x20) – alphanumeric character LCD provides specific indications for addressable devices
while LEDs indicate general panel status.
Semi-flush mounting kits are available for the enclosure.
The main board mounts in the rear of the enclosure. The power supply is physically contiguous
with the main board. The RND-2 main board (MPC6-MB) provides the connections for external
field wiring. Optional boards mount on the main board or on the rear of the enclosure.
The display board mounts on the inner-hinged plate.
All normal operation is controlled via a membrane keypad. Displays are provided by an 80-
character, alphanumeric, backlit LCD and by discrete LED indicators for major control unit
functions.
The 80-character LCD is used to display event data, including alarms and troubles,
identification of zone or device, and presentation of history. The display is controlled by a set of
four push-button switches commanding the control processor. A back light is included in the
display to assure visibility in low light, but to conserve power, it is only activated during a
reported event or on operation of a display control switch.
Individual LEDs on the panel are provided to indicate SYSTEM ALARM, PREALARM,
SUPERVISORY, ALARM SILENCED, SYSTEM TROUBLE and AC POWER ON. Direct push-
button controls are provided for ALARM SILENCE, ACKNOWLEDGE, MENU and SYSTEM
RESET.

Power Supply

A regulated fullwave rectified 24V nominal power supply provides all operating power to the
control unit for both standby and alarm conditions. Sufficient battery charging capability is
available to charge 38.5 AH sealed lead-acid batteries within code requirements for 60 hour
quiescent plus 5 minutes alarm. The cabinet will hold batteries only up to 12 AH. The back-up
battery is 24V, maintained by floating on the power supply. The battery will be automatically
disconnected at low battery voltage to prevent deep discharge.
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