Flow Control
0154CFA2B31A
Brooks Instrument Four-Channel Microprocessor Control and Readout Unit
About this part
0154CFA2B31A is a configured Brooks Instrument Model 0154 gas and liquid mass-flow secondary-electronics unit. Model 0154 supplies, reads, and controls as many as four compatible flow or pressure devices and provides setpoint, blending, valve-override, local/remote-control, totalizer, alarm, analog-I/O, and RS-232 functions. Brooks offered multiple housing, device-power, analog-signal, and communications-accessory configurations; the publicly available manufacturer literature does not decode the later CFA2B31A suffix, so those selectable attributes are not assigned to this unit without label or hardware evidence
Configurations vary. Verify the exact unit before choosing a replacement.
No archived photo available
Key Facts
Specifications
| Manufacturer | Brooks Instrument |
| Part identifier | 0154CFA2B31A |
| Base model | 0154 |
| Product family | Models 0152/0154 Gas and Liquid Mass Flow Secondary Electronics |
| Channel count | Four channels |
| Primary role | Power supply, readout, setpoint control, and valve control for compatible gas/liquid mass-flow and pressure meters or controllers |
| Control modes | Independent-channel or master/slave blending operation; local or remote control |
| Display | Backlit 4 × 20-character liquid-crystal display; percentage of full scale or configured engineering-unit reading |
| Operator functions | Setpoint selection, blending, valve override, local/remote control, totalization, high/low alarms, and per-channel menu selection |
| Mains input | 90–260 Vac, 50/60 Hz; 70 W maximum family rating |
| Device-power configurations | Available configurations: +15 Vdc at 2.9 A and −15 Vdc at 1.4 A maximum, or +24 Vdc at 2.5 A maximum; the CFA2B31A selection is not publicly decoded |
| Analog signal configurations | 0–5 or 1–5 Vdc; optional converter board supports 0–10 Vdc, 0–20 mA, or 4–20 mA on independently configurable channels; the CFA2B31A selection is not publicly decoded |
| Signal-output loading | Voltage output requires at least 1 kΩ load; current output permits up to 750 Ω load |
| Channel connectors | Four 15-pin D-sub connectors for flow or pressure devices |
| Remote analog I/O | One 25-pin D-sub connector carrying flow outputs and remote-setpoint inputs for as many as four channels |
| Remote valve override | One 15-pin D-sub connector supporting four external valve-override inputs |
| Serial communication | Standard RS-232 interface on a 9-pin D-sub connector; pin 2 TXD, pin 3 RXD, and pin 5 signal ground |
| Core cassette dimensions | 130 mm high × 220 mm wide × 230 mm deep (5.1 × 8.7 × 9.1 in), one-half-width 19-inch cassette, 3HE × 42TE |
| Available mounting arrangements | Cassette, 19-inch rack, tabletop, tabletop with handle, or panel mount; the CFA2B31A housing selection is not publicly decoded |
| Construction | Anodized-aluminum housing with steel covers; chromated-aluminum cassette in the earlier manufacturer manual |
| Ambient operating temperature | 0–50 °C (32–122 °F) |
| Mains fuses | Two 5 × 20 mm, 2 A time-delay fuses rated for the applied mains voltage |
| Documented approvals | CE; EMC based on EN 50082-2 and EN 50081-1; Low Voltage Directive based on EN 61010-1; CSA-NRTL/C based on CAN/CSA-C22.2 No. 1010.1-92 and ISA S82.01-1994 |
Configuration-code boundary
Brooks documentation confirms that Model 0154 was ordered with selectable housing, mains, device-power, analog-I/O, and PC-communications options. An earlier manufacturer manual illustrates a shorter ordering format such as 0154/C C1A10, while 0154CFA2B31A follows a later, longer format not decoded in the available manufacturer literature. The suffix must therefore be matched to a Brooks order record or the unit label before assigning its housing, ±15 Vdc versus +24 Vdc output, voltage versus current I/O, or supplied software and cable options.
Compatible Brooks device families and cables
Compatibility and cable references published in the Brooks installation manual.
| Device family | Published compatible models or functions | Published cable examples |
|---|---|---|
| Thermal mass-flow and pressure equipment | 5850 and 5860 mass-flow series; 5866 pressure-control series | 124Z236AAA (3 m), 124Z237AAA (6 m), 124Z610AAA (12 m); U.S. cable series 124Z576AAA through 124Z579AAA |
| Flomega liquid-flow equipment | 5880 and 5890 series | 124Z605ZZZ (3 m), 124Z606ZZZ (6 m) |
| Smart mass-flow equipment | 5850S series | 124Z893AAA (3 m), 124Z894AAA (6 m), 124Z895AAA (12 m) when digital PC communication is required; standard analog cables may otherwise be used |
| QUANTIM Coriolis equipment | QUANTIM mass-flow meter/controller | 124Z054AAA, 124Z050AAA through 124Z053AAA; dual flow-and-density/temperature cable series 124Z906ZZZ through 124Z909ZZZ |
| Personal computer | RS-232 connection to Models 0152/0154 | 124Z901ZZZ, 3 m |
15-pin channel-connector pinout
Each Model 0154 channel connector uses this manufacturer-published assignment. Supply pins depend on the installed ±15 Vdc or +24 Vdc power configuration.
| Pin | Direction | Function |
|---|---|---|
| 1 | Output | +15 Vdc or +24 Vdc |
| 2 | Input | Flow signal, mA |
| 3 | Output | Setpoint signal, mA |
| 4 | — | Not connected |
| 5 | Output | Setpoint signal, voltage |
| 6 | — | Setpoint ground |
| 7 | Output | Valve override |
| 8 | — | Flow ground |
| 9 | — | Reserved |
| 10 | Input | Flow signal, voltage |
| 11 | — | Not connected |
| 12 | — | Power ground |
| 13 | Output | +15 Vdc or +24 Vdc |
| 14 | Output | −15 Vdc on bipolar-supply models; not connected on +24 Vdc models |
| 15 | — | Not connected |
Lifecycle and replacement
Documentation Downloads
Local PDF copiesPart Photos
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- Brooks 0154 4-Channel Mass Flow Microprocessor Control & Read Out Unit