Fume Hood Controller Owner’s Manual

Address

Descriptor

Description

 

 

 

15

EMER STPT

A value of the preset FLOW STPT, in percent, that the controller uses as the

 

 

setpoint when EMER ALM is ON.

 

 

 

16

LOW WARN

This point displays an ON or OFF status. When the exhaust flow goes below the

 

 

value specified at LOW WARN LMT for the time specified in ALARM TIME, the

 

 

point goes into a warning state (ON); the yellow LED is illuminated at the ODP.

 

 

 

17

HIGH WARN

This point displays an ON or OFF status. When the exhaust flow goes above the

 

 

value specified at HI WARN LMT for the time specified in ALARM TIME, the

 

 

point goes into a warning state (ON), the yellow LED is illuminated at the ODP.

19

ALM AKNLG

This point displays an ON or OFF status that indicates the Horn Silence button

 

 

has been pressed at the ODP to acknowledge an alarm condition. The point will

 

 

reset when the alarm condition clears or another alarm is initiated.

27

AO2 DEADBAND

When EXH FLOW and FLOW STPT are different by more than the AO2

 

 

DEADBAND, the AO2 FLOW SIG changes from setpoint to actual flow.

 

 

 

30

AO2 RANGE

Scaling for the Analog Output (AO2) point. To get the correct output, the slope

 

 

and intercept of this point must match the point database of the room controller.

 

 

 

34

TRANS RANGE

The maximum range, in inches of water (PA), of the differential pressure

 

 

transmitter. Standard values are 0.1 (25.3), 0.25 (62.275), 0.5 (124.55), and 1.0

 

 

(253).

35

EXH FLOW

The calculated value, in CFM (LPS), of the exhaust airflow as measured with the

 

 

differential pressure transmitter sensor.

 

 

 

36

FLOW COEFF

Gain factor for the flow sensor.

 

 

 

37

FLOW STPT

Setpoint, in CFM (LPS), that the airflow is controlled to.

 

 

 

38

FLOW LO STPT

The low flow setpoint used in FLOW STPT.

 

 

 

40

CAL DP TRANS

YES or NO point used to calibrate the zero point of the differential pressure

 

 

transmitter.

41

DO1 SUP

Digital output 1 is used to control the analog output-pneumatic (AO-P) supply

 

 

valve or the AO-E module supply input.

 

 

 

42

DO2 EXH

Digital output 2 is used to control the analog output-pneumatic (AO-P) exhaust

 

 

valve or the AO-E module exhaust input.

 

 

 

43

DO3

Digital output 3 is a spare output.

 

 

 

44

AI1 DP TRANS

Analog input 1, a 4 to 20 mA signal from the differential pressure transmitter.

 

 

The point displays the mA value of input from the sensor.

 

 

 

45

AI2 0.10V

Analog input 2 is a 0 to 10 Vdc spare input.

 

 

 

46

AO1 0.10V

Spare analog output is a 0 to 10 Vdc output.

 

 

 

47

AO2 FLOW SIG

Analog output 2 signal is used to indicate the exhaust flow setpoint. The output

 

 

is 1 to 10 Vdc, which corresponds to 0 to A02 RANGE (Point 30).

 

 

 

48

DI1 STPT SW

Digital input for dry contact connection to control the HI/LOW flow setpoint of the

 

 

controller.

54

ODP DISPLAY

Controls the function of the ODP display. It will display either CFM divided by

 

 

10 or HI FLOW / LO FLOW.

 

 

 

55

DO3 MODE

Controls the function of the DO3. It will follow either the HI/LO setpoint or the

 

 

alarm status.

 

 

 

18

Siemens Building Technologies, Inc.

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Siemens 125-5033 owner manual Flow Coeff
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125-5033 specifications

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