Wiring The System Sensor; Wiring An External Set Point (4-20Ma Input); Wiring The Shutdown - Weil-McLain BSC Installation And Operation Instruction Manual

WIRING THE SYSTEM SENSOR

For proper operation, the BSC must be connected to a temperature or pressure sensor located in the common header.
SYSTEM TEMPERATURE
stages before any takeoffs. If the sensor cannot read the output of all the stages, it will not be able to control the system properly.
SYSTEM PRESSURE
See Sensor Type selection on page 13.
of all the stages. If the sensor can not read the output of all the stages, it will
not be able to control the stages properly.
should be connected.

WIRING AN EXTERNAL SET POINT (4-20MA INPUT)

System (EMS) or any other signal source.
Point in the Startup menu on page 13). These settings will allow the BSC to read the
4-20mA input signal and adjust the set point based on its external set point setting.
BSC EMS terminal marked +. Attach the (-) side of the 4-20mA signal to the EMS terminal
marked SIGNAL.
4-20mA input to the BSC EMS terminal marked SIGNAL. Attach the (-) side of the 4-20mA
input to the EMS terminal marked SHIELD.

WIRING THE SHUTDOWN

remain in low for the Soft-Off period (See Soft-Off Delay on page 27) and then, turn off.
over, then it will also turn off.
SHUTDOWN terminals.
BSC Installation and Operation Manual
TEMP-A2 with one of the sensor wires.
SHUTDOWN- A3, A4.
A1
T
SYSTEM
TEMP
A2
A3
SHUTDOWN
TEMP- A1, A2.
A3
SHUTDOWN
A4
BLACK
S
A5
PRESS
4-20mA
A6
+
RED
A7
NETWORK
A8
EMS Sourcing Current
EMS INPUT
+
SIGNAL
Current Modulation Outputs in series with
BSC Sources Current
24VDC Excitation Voltage
EMS INPUT
+
SIGNAL
T
A1
A2
A3
SHUTDOWN
A4
SYSTEM SENSOR
SHIELD
Transducer
4-20mA
+
(-)
EMS
Input
(+)
SHIELD
(-)
EMS
(+) Input
SHIELD
Shutdown Signal
SYSTEM
TEMP
Dry Contact
7