Flow Control

0154CFD2A11A

Brooks Instrument Four-Channel Mass-Flow Readout and Control Unit

About this part

0154CFD2A11A is a configured Brooks Model 0154 microprocessor-based secondary-electronics unit. It supplies power to and provides readout, setpoint, blending, valve-override, and local/remote control functions for as many as four compatible mass-flow or pressure devices. It is a control and display unit rather than a flow meter or mass-flow controller installed directly in the process line

Configurations vary. Verify the exact unit before choosing a replacement.

Specifications Documents (4)Photos (4)Listing history

Brooks Instrument 0152/0154 Secondary Electronics 0154CFD2A11A Four-channel mass-flow readout and control unit auction image

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Key Facts

ManufacturerBrooks Instrument 0152/0154 Secondary Electronics

Part number0154CFD2A11A

Product family5850

Device typeFour-channel mass-flow readout and control unit

Configuration statusConfiguration varies

Application classIndustrial automation and process equipment

CategoryFlow Control

Specifications

Identification

Manufacturer	Brooks Instrument
Base model	0154
Configured identifier	0154CFD2A11A

Function

Channel capacity	Four independent control/readout channels
Supported operating arrangements	Independent channels or master/slave blending operation
Local controls	Membrane keys for channel selection, setpoint, blending, valve override, local/remote selection, and menu functions

Display

Display format	Backlit 4-line × 20-character display
Displayed variables	Percentage of full scale or configured readings for flow, pressure, density, or temperature
Full-scale entry range	0.000 to 99999.999 when an engineering unit other than percent is selected
Decimal-place selection	Zero to three decimal places

Electrical

AC power input	90–260 VAC, 50/60 Hz; 70 W maximum per the family specification
Instrument power-output options	+15 VDC at 2.9 A and −15 VDC at 1.4 A maximum, or +24 VDC at 2.5 A maximum; installed option must be confirmed for the configured unit

Signals

Standard analog signal ranges	0–5 VDC, 1–5 VDC, 0–20 mA, or 4–20 mA; optional I/O hardware also supports 0–10 VDC
Output load	1 kΩ minimum for voltage output or 750 Ω maximum for current output

Communications

Computer interface

RS-232 serial interface through a 9-pin D-sub connector

Connections

Channel connectors	Four 15-pin D-sub connectors on Model 0154
Remote signal connector	One 25-pin D-sub for four-channel remote setpoint inputs and process-signal outputs
External valve-control connector	One 15-pin D-sub

Construction

Housing materials	Anodized aluminum with steel covers
Available enclosure formats	Half-width 19-inch rack cassette, tabletop enclosure, or panel-mount installation

Dimensions

Rack cassette size

130 mm high × 220 mm wide × 230 mm deep (5.1 × 8.7 × 9.1 in)

Environmental

Operating ambient temperature

0–50 °C (32–122 °F)

Approvals

Family approvals

CE and CSA-NRTL/C; intended for indoor use up to 2,000 m altitude, Pollution Degree 2, Installation Category II

Lifecycle

Product status

Discontinued; Brooks identifies the 0250 Series as its replacement family

Configuration boundary

The Model 0154 prefix establishes the four-channel platform, but the installed options must not be inferred solely from the remaining suffix.

Verified base-model meaning0154 identifies the four-channel member of the Brooks 0152/0154 secondary-electronics family.

Configured suffixThe available manufacturer family documents do not publish a reliable decoding for CFD2A11A.

Nameplate-dependent detailsConfirm enclosure style, AC cord, ±15 VDC versus +24 VDC output, and fitted analog I/O board from the unit label and rear-panel hardware.

Functions and operating behavior

Each channel may operate independently or as a master or slave in a blending arrangement.
Valve override can command the connected controller valve open for purge, closed for shutoff, or returned to normal controller operation.
Each channel can be placed in local or remote control independently.
The selected valve-override state is retained across a power cycle.
Changing the displayed engineering-unit text does not itself convert the numerical value; the corresponding full-scale value must be configured correctly.

Compatible Brooks equipment identified in the manual

Compatibility requires the appropriate Brooks interconnection cable and matching electrical configuration.

Flomega 5880 and 5890 Series
5850 and 5860 mass-flow products
5866 pressure-control products
5850S Smart Mass Flow Series
QUANTIM mass-flow meters and controllers

15-pin channel-connector pinout

This pinout applies to each Model 0154 channel connector. Power pins vary with the installed ±15 VDC or +24 VDC supply option.

Pin	Direction	Function
1	Output	+15 VDC or +24 VDC
2	Input	Flow current signal
3	Output	Current setpoint
4	—	Not connected
5	Output	Voltage setpoint
6	—	Setpoint ground
7	Output	Valve override
8	—	Flow-signal ground
9	—	Reserved
10	Input	Flow voltage signal
11	—	Not connected
12	—	Power ground
13	Output	+15 VDC or +24 VDC
14	Output	−15 VDC with bipolar supply; not connected with +24 VDC supply
15	—	Not connected

RS-232 connector pinout

The Model 0154 uses a 9-pin D-sub serial connector.

Pin	Signal	Function
2	TXD	Transmitted data
3	RXD	Received data
5	GND	Signal ground
1, 4, 6–9	NC	Not connected

I/O installation notes

A unit requiring only 0–5 VDC input and output does not require the optional I/O conversion board.
The optional four-channel I/O board converts 0–10 VDC, 0–20 mA, or 4–20 mA signals to and from the internal 0–5 VDC range; each channel can be jumper-configured separately.
For current-loop operation, the flow and setpoint current grounds must be tied to power ground. The high-impedance voltage-signal grounds are not designed to sink current and can produce incorrect readings if used that way.
When non-Brooks cables connect compatible digital mass-flow devices using current I/O, the manual requires channel-connector pins 3 and 5 to be linked at the readout end.

Replacement and retrofit relationship

Brooks no longer offers Models 0152 and 0154 for sale and identifies the 0250 Series as their replacement family.

Four-channel successorModel 0254 is the current four-channel member of the 0250 Series.

Tabletop retrofitBrooks provides instructions for installing a Model 0254 into a tabletop housing previously used by a Model 0152 or 0154.

Applicability limitThe tabletop retrofit instruction does not establish universal mechanical or electrical interchangeability for every 0154 enclosure and configured I/O arrangement.