Detcon X40-32-N7 - Manual (Page 45)

Model X40
Model X40 Instruction Manual Rev. 3.3 Page 39 of 64
3.11 General Installation Wiring Notes
 Follow generally accepted guidelines for RS-485 serial networks. Do not wire I/O Modules and/or
Modbus™ gas sensors in long-distance ‘T-Tap’ configurations. Instead, use a “daisy-chain” wiring
scheme.
 Use Detcon Recommended cabling whenever possible.
 General Cable Commodore P/N ZO16P0022189 is recommended for a single cable providing
serial communications and power.
 Ground the cable shielding at the Model MCX-32 controller only. Other points of grounding may
cause a ground loop, and induce unwanted noise on the RS-485 line, which in turn may disrupt
communications.
 For wireless installations, verify that all devices in the wireless network reside on the same RF channel
as transceivers will only respond to other transceivers with the same RF channel.
 If multiple wireless networks are implemented, each wireless network must exist on a separate RF
channel in order to avoid cross talk and interference between networks.
 Any slave device near an elevated antenna needs to be at least as far from the antenna as the antenna is
high. For example, if the antenna is 20ft. high, then the nearest slave device should be at least 20 ft.
away.
3.12 Initial Start-Up
CAUTION
Applying power with devices hooked up incorrectly may cause damage to the
equipment.
1. Verify that all the wiring connections and external devices are installed correctly before applying
power to the controller.
2. Verify that all Modbus™ devices have unique Modbus™ address, and are addressed correctly.
3. Apply the desired power option to the X40. For N1 and N4 units, ensure that the Disconnect
Terminal Blocks are closed. The controller will power up once power is applied.
4. Verify normal operation once power is applied to the unit. The unit will cycle through the
following:
•
Boot up and display the company name, model, firmware version and COMM ports available.
• Proceed to poll Modbus™ addresses of any attached devices.
• The LCD will then refresh and display the next eight channels and so on until the LCD cycles
back to the first eight channels and repeats the process.
NOTE: If a previous configuration does not exist, the user must either manually configure the
network or run Auto Configure from the user-interface. The unit will display the current status
of the connected devices if the unit has been configured properly.
5. Apply test gas to each sensor connected to the X40. Verify that the correct alarm outputs are
activated when gas is applied. If AO-4 modules are installed, the current output for each channel
should also be verified.