Brooks Instrument Ar-Mite 3750 Manual De Instalación Y Operación página 12

Section 1 Introduction
Brooks Ar-Mite
®
Figure 1-2 Reed Switch Wiring Diagram
1-6
MT 3750C
TM
Reed Switch Alarm
Two reed switches are installed in the alarm housing to provide signaling or
switching functions when a preset flow value has been reached. The reed
switches provide high, low or dual setpoints and latched output over the full
range. The switches are normally adjusted to the desired flow range in the
factory. Modifications to the switch settings can be made in the field, refer
to Section 3-4. Minimum setting distance between two switches is
approximately 40% of the scale. (Refer to Figures 1-1 and 1-2)
Data Reed Switch
Maximum Voltage*
Maximum Current*
Maximum Contact Rating*
(Maximum Switch Specifications)
Electrical Classification
Non Incendive:
Maximum Voltage
Maximum Current
Maximum Contact Rating
CSA (US and Canada)
Intrinsic Safety:
Entity parameters
Vmax = Ui = 30 Vdc, Imax = Ii = 100 mA, Ci = 0, Li = 0
CSA: (US and Canada)
NI Class I, Div. 2, Groups A, B, C and D:
Class II Groups F and G, T6
per CSA-213: 1987; UL 1604; 1995
IS Class I, II, III, Div. 1, Groups A thru G, T6
per CSA-157:1992; UL 913:2002
Installation and Operation Manual
X-VA-MT3750C-eng
Part Number: 541B063AAG
February, 2011
175 Vdc, 124 Vac
250 mA
3 Watts
30 Vdc
100 mA
3 Watts