Millennium Enterprises AD-ST1400-25, MLP-A/AR user manual Mount, Connecting Wires

Net Safety Monitoring Inc

Mount

The Controller is usually mounted near eye-level and be easily accessible for calibration and maintenance purposes. The Sensor should be placed where O2 may build up or where other gases are likely to build up and displace O2.

Ensure all devices are securely mounted, taking into consideration all requirements.

Use the Face Rotation Option to mount the Millennium Controller at a different orientation (refer to "Face Rotation Option" on page 19 for detailed instructions).

STEP 3 — WIRE

FIELD INSTALLATION

WARNING: Wiring codes and regulations may vary. Compliance with regulations is the responsibility of the installer. Wiring must comply with applicable regulations relating to the installation of electrical equipment in a hazardous area. If in doubt, consult a qualified official before wiring the system.

•If the 4-20 mA signal is not used, connect a jumper between the 4-20 terminal and the Common terminal.

•The use of shielded cable is highly recommended for signal, input, output and power wires to protect against interference caused by extraneous electrical or electromagnetic 'noise'.

•In applications where the wiring cable is installed in conduit, the conduit must not be used for wiring to other electrical equipment.

•The maximum distance between the Sensor and Controller is limited by the resistance of the connecting wiring, which is a function of the gauge of the wire being used (refer to " Resistance Table in OHMS" on page 21).

•When developing a RS-485 chain of devices, the last device in the chain requires end of line termination.

•RS-485 connection 2-wire, multipoint serial line.

SEAL

•Water-proof and explosion-proof conduit seals are recommended to prevent water accumulation within the enclosure.

•Seals should be located as close to the device as possible and not more than 18 inches (46 cm) away.

•Explosion-proof installations may require an additional seal where conduit enters a non-hazardous area. Ensure conformity with local wiring codes.

•When pouring a seal, use a fibre dam to assure proper formation of the seal. Seals should never be poured at temperatures below freezing.

•The jacket and shielding of the cable should be stripped back to permit the seal to form around the individual wires. This will prevent air, gas and water leakage through the inside of the shield and into the enclosure.

•It is recommended that explosion-proof drains and conduit breathers be used. In some applications, alternate changes in temperature and barometric pressure can cause 'breathing' which allows moist air to enter and circulate inside the conduit. Joints in the conduit system are seldom tight enough to prevent this 'breathing'.

Note: Seals are not required for all Class 1 Division 2 locations in Canada. However, to fully avoid any exposure, the use of seals are still recommended, especially for installations that use high-pressure or steam cleaning devices in proximity to the controller and/or sensor.

Connecting Wires

1.Use a small screw driver to gently press down and hold the spring connector open.

2.Insert appropriate wire into open connector hole.

3.Release screw driver to secure wire.

MLP-A/AR/AD-ST1400-25 4