DH Instruments MFC SWITCHBOX, Руководство пользователя

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1. INTRODUCTION
Page 3 © 1997-2008 DH Instruments, a Fluke Company
1.3.3 FRONT PANEL ASSEMBLY
Provides connecting ports for up to five DUTs.
1.3.4 REAR PANEL ASSEMBLY
Supports power, signal communication with molbox1 or MFC-CB, control communication with
molbox1 or MFC-CB and carries the cooling fan.
1.4 SPECIFICATIONS
1.4.1 GENERAL SPECIFICATIONS
Power Requirements 85 to 264 VAC, 50/60 Hz, 55 VA maximum consumption
Weight
1.5 kg (3.25 lb)
Dimensions 22.5 cm W x 7.5 cm H x 20.0 D (8.85 in. x 2.95 in. x 7.87 in.)
1.4.2 MFC CONTROL FUNCTION SPECIFICATIONS
The MFC Switchbox works with any MFC that can be used with the molbox1 or MFC-CB.
The switchbox provides the MFCs with continuous power, but the molbox1 or MFC-CB still
provides all the control and measurement. For detailed specifications regarding MFC control
please refer to specifications section of the molbox1 or MFC-CB Operation and Maintenance
Manual.
Current based MFCs can only be used when connected to device 1 of the MFC Switchbox.
It is not possible to switch between multiple current based MFCs.
The Valve Test Point signal is only available on device 1 of the MFC Switchbox.
1.4.2.1 MOLBOX1 OR MFC-CB MFC PORT
Connector One 25 Pin Female DSUB Metal Case Socket (Back Panel)
Signals (16) +15 VDC
-15 VDC
Power Supply Common
Setpoint Voltage (0 to 5 VDC)
Setpoint Common
MFC Measure (0 to 5 VDC)
MFC Measure Common
Setpoint Sense (0 to 5 VDC) Setpoint Sense Common
Valve Test
Valve Test Common
Setpoint Current (4 to 20 mA Output)
MFC Measure (4 to 20 mA Input)
Case Ground (Earth Ground)
RS485 TXRX+
RS485 TXRX-
1.4.2.2 MFC PORT 1 (DEVICE 1)
Connector One 25 Pin Female DSUB Metal Case Socket (Front Panel Device 1)
Signals (16) +15 VDC
-15 VDC
Power Supply Common
Setpoint Voltage (0 to 5 VDC)
Setpoint Common
MFC Measure (0 to 5 VDC)
MFC Measure Common Setpoint Sense Common
Valve Test
Valve Test Common
Setpoint Current (4 to 20 mA Output)
MFC Measure (4 to 20 mA Input)
Case Ground (Earth Ground)
RS485 TXRX+