ERL L-PRO 4000, User Manual

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Appendix C Hardware Description
Appendix C-2 L-PRO 4000 User Manual D02706R02.30
Rear Panel
Comm Board
(RPCB)
The RPCB provides the relay with two RS-232 ports (Ports 122 and 123,
DB9F), IRIG-B time synchronization input (Port 121, male BNC), internal
modem connection (Port 118, RJ-11) and two Ethernet ports (Ports 119 and
120, RJ-45 or 100BASE-FX MM 1300nm ST, depending upon order specifi-
cation). The RPCB interfaces to the MPB. Port 119 is the exception in that it
interfaces to the GFPCB where it shares an internal switch with the front panel
LAN port. The switch then interfaces to the MPB.
Output Contact
Board (LOCB)
The LOCB provides 14 normally open contact outputs for relaying, alarms and
control. It also provides one normally closed output contact for relay inopera-
tive indication. This board interfaces to the MPB.
Digital Input/
Output Board
(DIGIO)
The DIGIO provides 11 digital input channels. Inputs are optically isolated, ex-
ternally wetted, and factory preset to the customer's requested voltage level of
48, 110/125 or 220/250 Vdc. The DIGIO also provide 7 normally open contact
outputs for relaying, alarms and control. This board interfaces to the MPB.
Relay AC
Analog Sensor
Boards (RASB)
Each relay has 3 RASBs. Two RASBs have 3 voltage transformer inputs and
3 current transformer inputs while the third RASB has 6 current transformer
inputs. These boards provide 12 current and 6 voltage ac analog measurement
inputs. The RASBs interface to the RAIB.
Relay AC
Analog Input
Board (RAIB)
The RAIB provides the analog to digital conversion of the 12 ac analog current
inputs and the 6 ac analog voltage inputs. The sample rate is fixed at 96 sam-
ples/cycle. Each channel is simultaneously sampled using 16-bit analog to dig-
ital converters. The digitized data is sent to the MPB for processing and
implementation of the protection algorithms.
• A time synchronism processor with automatic detection of modulated and
un-modulated IRIG-B
• A high speed link is provided between the DSP and control processor sub-
systems.
• Sophisticated fault detection and “watchdog” recovery hardware
• The MPB also provides the power supply for the entire unit. The power
supply operating range is 48-250 Vdc, 100-240 Vac, +/-10%, 50/60 Hz.
This wide operating range provides easier installation by eliminating pow-
er supply ordering options
Graphics Front
Panel Comm
Board (GFPCB)
The GFPCB provides the front panel USB and Ethernet ports, the front panel
status LEDs and interfaces the MPB to the FPDB. The MPB controls the state
of the LEDs.
Graphics Front
Panel Display
Board (GFPDB)
The GFPDB provides the 240x128 monochrome graphics front panel display
and the keypad. The keypad is used to navigate the menus on the display to
control relay operation by a local user.