Operation and Maintenance Manual (DTR) iSWAY
®
Set of products
Version 1.8 of 2.2021
105
NOTE!
The resistor is a maintenance-free element. The inspection is carried out by an Authorised SMAY
Service during the annual inspection. If a resistor malfunction is detected, inform the SMAY
service immediately. Do not repair or replace the resistor yourself. This can only be done by
SMAY service or an authorised SMAY service.
14.10.
MAC-FC controller
The MAC-FC controller is a processor-controlled electronic device. The controller is used to
control pressure differential systems in accordance with the requirements given in PN-EN 12101-
6.
The MAC-FC controls the fan with a frequency inverter, based on a pressure reading from a
pressure sensor located in the MAC-FC, P-MAC or P-MACF. The controller selects the operating
status of the system automatically depending on the status of its inputs, and displays it on the
cooperating device, the TSS Signalling and Control Panel or the Devices Operation Status
Monitoring (MSPU).
The controller is powered by 24VDC.
•
Connecting the device:
The connection (SAP, FireBUS) should be made according to the electrical and automation design.
Individual wiring diagrams of the devices can be found in the above operation and maintenance
manual in chapter 13.
NOTE!
For lines where the use of shielded cables is provided, unshielded cables are not allowed.
•
FireBUS communication bus :
Communication with other devices has been implemented in RS-485 standard. Shielded cables
are required for proper transmission operation. For correct operation, the signal lines D+, D- and
COM reference line (D+ and D- must be connected in a wire pair).
If the 24V power supply to the cooperating devices (e.g. P-MACF differential pressure transmitters,
T-MAC temperature transmitters) is provided together with the communication bus, the +24V
OUT+ line must also be connected. The reference level of the 24V power supply out-(power ground)
and FireBUS® COM transmission can be made with the same cable.
For FireBUS® , the HTKSH FE180/PH90 ekw 2x2x0.8 is recommended.
•
Input line fault monitoring:
All input lines, digital lines, MAC-FC controller are equipped with functions of monitoring of line
fault conditions, short circuit or open circuit status. For proper operation of the monitoring
function, it is required to connect the opposite end of the monitored line of two resistors with the
given value and in the given configuration, see figure 14.14.
