4�5 Local Detector Option; 4�6 Electrical Installation - Honeywell Midas User Manual

4.4 In-line Filters
External filters must be used to protect the
tubing from contamination. Use particulate
filter part number 780248 for normal gases and
1830-0055 or 1991-0147 for corrosive gases.
Replace the filter every 3 months. Refer to
Appendix B for specific gases.
4.5 Local Detector Option
The Midas gas detector can also be used to
®
monitor for gas at the location of the detector. To
do this an inline filter is simply connected to the
sensor cartridge gas inlet port. The external dust
filter part number is 780248 for normal gases and
1830-0055 or 1991-0147 for corrosive gases. The
area around the detector is then being monitored
as opposed to a sample being drawn from a remote
location.
Diagram 4-4. Local gas detector option
MIDAS-T-001 transmitter
installed with in line particulate
filter for local ambient monitoring
mode
4.6 Electrical Installation
Access for the electrical wires to the terminal module
is made via the PG16 cable gland located at the
bottom of the mounting bracket assembly. The
cable gland can be removed and replaced with a
suitable conduit fitting if required. The wire routing of
a typical installation is shown in the diagram below,
wiring details are shown in
4-20mA
Analog
Output
Terminals
MDA Scientific Midas
honeywell
PN: MIDAS-E-CDX
Cable Gland
SN: 12K-48397
Activate by 24-Nov-12
honeywell
The terminals used are suitable for conductors of 24
to 14 AWG (0.5 to 1.8mm Dia.). The use of 16 AWG
(1.5 mm Dia.) conductors is recommended.
4-8
Midas Gas Detector
®
Diagram
Diagram 4-5. Typical wire routing
4-6.
Relay NO/NC
Jumpers
Relay Contact
Terminals
Power Switch
Ethernet Cable