Reference
11-12 Manual # 42-02-7223
BRAKE
BD Brake Drive relay indicator. When relay BD (iBox IRB board) is closed to
pick the brake, this LED is ON. Monitored by Safety Processor A.
TB Brake Triac active indicator. When the brake triac on the iBox IRB board
is active (completes circuit for BD relay), this LED will light. Monitored by
Safety Processor B.
BRD Brake Redundancy indicator. This LED lights when the main brake con-
tactor drops out.
BDRD Brake Drive Redundancy indicator. This LED lights when the BD relay
drops out.
DRIVE
MD Motor Drive relay indicator. When relay MD (iBox IRB board) is closed to
enable the motor, this LED will light. Monitored by Safety Processor A.
TM Motor Triac active indicator. When the motor triac on the iBox IRB board
is active (completes circuit for MD relay), this LED will light. Monitored
by Safety Processor B.
MRD Motor Redundancy indicator. This LED lights when the main motor con-
tactor drops out.
MDRD Motor Drive Redundancy indicator. This LED lights when the MD relay
drops out.
SAFETY
SAFC Safety Cartop input. Cartop safety relays and switches are wired in
series between SAFH (Safety Hoistway) and SAFC. If any contact in the
safety string opens, there will be 0 VDC on this input and the car will not
run. If all safety contacts in the string are closed, there will be 110 VDC
on this input.
SAFH Safety Hoistway input. Hoistway safety relays and switches are wired in
series between the #3 bus and SAFH. The path also includes the Gover-
nor switch, with the GOV connection providing access to the #3 bus via
the governor switch. (#3 to GOV through governor switch, GOV to SAFH
through hoistway safety relays and switches). The job prints for the job
provide specific wiring instructions. If any contact in the safety string
opens, there will be 0 VDC on this input and the car will not run. If all
safety string contacts are closed, there will be 110 VDC on this input.
SPARES
SP1 D Optional input. Job prints will show if and how this is used on a per
installation basis.
SP2 D Optional Brake Pick Switch input. The “Switch “parameters on the Con-
troller > Configuration > Brake > Control tab indicate the state of termi-
nal SP2D (110VDC or 0V) used to indicate that the brake is picked (See
“Brake - Control Tab - Switch” on page 26.
SP2 Optional input. Job prints will show if and how this is used on a per
installation basis.
SP3 Optional input. Job prints will show if and how this is used on a per
installation basis.
SP4 Optional input. Job prints will show if and how this is used on a per
installation basis.
Table 11.3 iBox Field Connections
Source Connection Signal Description
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