The maximum allowable field wiring resistance between the transmitter and the IOTA connection terminal is dependent upon the voltage requirement of the transmitter. The formula for calculating the maximum wiring resistance for the Series C UIO channel used as an analog input is given by the following equation.
CAUTION
Equipment Damage Hazard.
Incorrect combination of relay module, amplifier
and flame detector can cause equipment damage.
In infrared applications (C7015 Infrared Flame
Detector and R7848 Amplifier) using the RM7890
Relay Module with software version 4004 or less
requires a ten-second delay to start sequence. This
applies only to the initial power of the RM7890.
INSTALLATION
When Installing this Product...
1. Read these instructions carefully. Failure to follow them
could damage the product or cause a hazardous
condition.
2. Check the ratings given in the instructions and on the
product to make sure the product is suitable for your
application.
3. Installer must be a trained, experienced, flame
safeguard control technician.
4. After installation is complete, check out the product
operation as provided in these instructions.
WARNING
Electric Shock Hazard.
Can cause electrical shock, serious injury or
death.
Disconnect the power supply before beginning
installation. More than one power supply
disconnection can be involved.
IMPORTANT
1. Wiring must comply with all applicable codes,
ordinances and regulations
2. Wiring (where required) must comply with NEC
Class 1 (Line Voltage) wiring.
3. Perform all required checkout tests after installation
is complete.
CAUTION
Equipment Damage Hazard.
Can cause equipment damage.
Disconnect 7800 SERIES Relay Module power before
removing amplifier.
Installing Plug-In Flame
Signal Amplifier (Fig. 2)
WARNING
Electric Shock Hazard.
Can cause electrical shock, serious injury or
death.
Disconnect the power supply before beginning
installation. More than one power supply
disconnection can be involved.
