Brooks Instrument MT3809E - Manual (Page 16)

1-10
Section 1 Introduction
Models MT 3809 & 3819
Installation and Operation Manual
X-VA-MT3809-3819-eng
Part Number: 541B049AHG
September, 2008
Two Alarm Outputs (open collector)
Optically isolated outputs assignable to alarms, reverse flow indicator, or
manual valve.
Maximum off-state voltage: 30 Vdc
Maximum off-state current: 0.05 mA
Maximum on-state voltage: 1.2 Vdc
Maximum on-state current: 20 mA
One Pulse Output (open collector)
Optically isolated. Scaleable to a variety of engineering unit systems
(pulses per liter, gallons, etc.)
Range: 1 Hz to 1 kHz
Maximum off-state voltage: 30 Vdc
Maximum off-state current: 0.05 mA
Maximum on-state voltage: 1.2 Vdc
Maximum on-state current: 20 mA
Linearity
Less than 1% at maximum current
Temperature Influence
Less than 0.04% per °C
Voltage Influence
Less than 0.002%/Vdc
Load Resistance Influence
±0.1% full scale
Transmitter, Alarm and Pulse Wiring Diagrams
Refer to Figures 1-3, 1-4, 1-5 and 1-6
For Division 1 explosion proof installations, the optional explosion proof
enclosure must be used. This enclosure does not use the auxiliary terminal
box, as shown on some of the installation diagrams. All connections are
made directly within the housing. Cable entry device shall be certified as
Flame-proof type, suitable per the conditions of use and correctly installed.
If used with conduit, refer to Figure 1-7, a sealing device shall be provided
in accordance with Figure 1-7.
For Division 2 non-incendive installations, either the standard enclosure or
the explosion proof enclosure may be used.
For both Division 1 explosion proof and Division 2 non-incendive
installations, the barriers shown in the installation drawings are
unnecessary. However, NEC Class 2 circuits are required.
The circuits shall be wired separately or using a Multicore Cable Type
B, in accordance with EN 60079-14. Also wiring must be done in
accordance with the applicable electrical codes, ie., NEC Chapter 5,
CEC Section 18 and any local codes.
TRANSMITTER ACCESSORIES
General purpose and intrinsically safe HART compatible power supplies
are available in 110V and 220V.