Installation, Operation and Maintenance Manual
12
Note all stop / start signals have equal priority and the system can be stopped and started
using the display or remote stop buttons even if terminals 24 and 28 are bridged. To restart
from terminals 24 and 28 this connection must be opened and re-closed. The fan will not start
when the main power is turned on even if 24 & 28 are bridged.
3.11. Outputs for remote control lamps: terminals 29–31
Outputs for ‘Alarm’ and ‘Fan on’-lamps; 24 V maximum load 2W.
3.12. Optional analogue output: terminals 32–34
When this option is supplied a sensor with accuracy of 2,5% will be used. The analogue output is
available at terminals 32-34. The usage of the 0.5% accuracy sensor is possible (at an additional cost).
Optionally the terminals 32-34 can be used as analogue 4-20 mA input (ATEX zone 1 or 2 applications
using external pressure transducer). Terminal 32 = Ground; 33 = in - or output signal sensor; 34 =
Common (+).
3.13. Valve outputs: terminals V1–V16 – Single module systems
The (-) connection of the valves will be made to terminals V1 to V16. The outputs have a maximum load
of 1.9A (45W at 24V DC). The outputs are short circuit and over voltage protected. Up to two solenoid
valves (22W) per output terminal can be connected, so 32 valves in total.
3.14. Valve outputs: terminals V1–V16 – Multiple module systems
Where the TCB is used to operate more than 32 valves a serial linked system is used. The master TCB
will contain an I/O module for connection of motor contactors, alarms, input and output signals. Valves
will be connected using 3 or more slave modules connected to the system using the RS-485 bus
connection. Each slave module contains an PCB pre-wired to the solenoids – max 16 / module.
The slave modules should be connected together and to the master TCB using the connecting leads
supplied.
3.15. Rotary switches “Slave address” and “mode”.
The two rotary switches “slave address” and “mode” are used to set the module number and cleaning
mode. The setting of switches is for the master and pre-mounted slave modules are done in the factory
and should not be changed. For modules assembled to the collector on site set the slave address
switches as detailed below.
Settings are as follows:
Master system – Slave Address = 0,
Mode = 0
Slave modules – Slave address = 1, 2, 3, …. Etc – 1 = Nearest to the master controller.
Mode = 0
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