CTI Products DC Distribution Panel - Manual (Page 6)

CTI Products, Inc. DC Distribution Panel User Guide
Status Indication
Three status signals are available to inform monitoring equipment if the redundant power supplies
are functioning or if any fuses are blown. The three status signals are driven from solid state
relays, with an output rating of 60V, and protected with 0.5A fuses. (These fuses are non-field
replaceable, since they are soldered.) These signals are referenced to the COM signal. Table 2
lists the terminal connections for these signals and jumpers for referencing to GND.
Signal TB7
Terminal
GND
Referenc
e Jumper
Description
GND 1 Ground Reference
ALRM_FUSE- 2 E3 Relay contact closes if either
input supply is not
ALRM_FUSE+ 3 present, or if any fuse (F1 –
F6) is blown.
PWRB_OK- 4 E2 Relay contact closes if the
input supply is
PWRB_OK+ 5 present and Fuse F6 is OK.
PWRA_OK- 6 E1 Relay contact closes if the
input supply is
PWRA_OK+ 7 present and Fuse F5 is OK.
Table 2 – TB7 Signal Connections
M OUNTING
The Power Supply Options are normally mounted to the panel on the side opposite to where the
relay boards are mounted as indicated in Error! Reference source not found.. This figure shows
the Hot-Standby Power Supply Option. For the Single Power Supply Option, only the supply on
the right-hand side is used. (The Relay Power Distribution Board is not used for the Single Power
Supply Option.)
Index 6