Specifications

1. INTRODUCTION

1.1 PRODUCT OVERVIEW

MFC-CB is a two channel analog input/output device designed to set and read voltage and current

signals from analog Mass Flow Controllers (MFC) and Mass Flow Meters (MFM). A DH Instruments

MFC Switchbox may be connected to either channel allowing switching of the channel’s control

between five permanently powered channels. As an option, (8) external 12 V drivers can also be

included to excite peripheral equipment such as solenoid valves.

MFC-CB provides a local user interface via a front panel key pad and display and includes advanced

on-board functions. Remote communication capability is supported by RS232 and IEEE-488 interfaces.

MFC-CB is intended for applications where convenient local and remote control of analog MFCs and/or

MFMs is desired, for example in setting up an MFC calibration system using a DH Instruments

molbox1 or molbox RFM flow standard.

1.2 SPECIFICATIONS

1.2.1 GENERAL SPECIFICATIONS

Power Requirements

100 to 240 VAC, 50 to 60 Hz, 38 VA max. consumption

Power Supply Output

± 15 VDC @ 1 Amp max, 0.5 Amp per channel

Operating Temperature Range

15 to 35 °C

Storage Temperature Range

-20 to 70 °C

Warm Up Time

1 hour for best electrical measurement specifications

Vibration

Meets MIL-T-28800D

Weight

2 kg (4.4 lb)

Dimensions

8 cm H x 22.5 cm W x 20 cm D

(3.1 in. x 8.9 in. x 7.9 in.) approx.

Microprocessor

Motorola 68302, 16 MHz

Communication Ports

RS232 (COM1), RS232 (COM2), IEEE-488,

DHI MFC Switchbox

Electrical Connections

DEV1 and DEV2: 25 pin female DSUB

CE Conformance

Available. Must be specified.