CIAT Magister 2 Series, Установка, Эксплуатация, Пусконаладка, Обслуживание

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3.6 Relay boards
The dry contacts on the relay boards make it possible to remotely view the states of the stages that are on and all the fault states on the unit.

A 230 V +6% -10% power supply must be provided for each relay board.

Connect terminal block J1 (1-2) on each relay board to terminal block J10 on the main board.

If the link between the motherboard and the relay board is defective, contact 1-2 on the relay board will chatter at a rate of one change in
state per second.
These are NO dry contacts.
Terminal block layout:
1-2 Permanent fault, water flow rate
3-4 Permanent fault, frost protection (liquid or water), circuit 1
5-6 Permanent fault, HP 1 (sensor or manual)
Main 7-8 Permanent fault, LP 1
relay board: 9-10 Permanent fault, discharge temperature 1 or 2
1 circuit 11-12 Stage 1 status, contact closed, stage ON
13-14 Stage 2 status, contact closed, stage ON
15-16 Motor fault, stage 1, contact closed motor fault
17-18 Motor fault, stage 2, contact closed motor fault
19-20 Fan fault
21-22 Permanent fault, frost protection (refrigerant or water), circuit 2
Additional 23-24 Permanent fault, HP 2 (software or manual)
relay board 1 25-26 Permanent fault, LP 2
2 circuits 27-28 Permanent fault, discharge temperature 3 or 4
If P3 = 2 29-30 Stage 3 status, contact closed, stage ON
31-32 Stage 4 status, contact closed, stage ON
33-34 Motor fault, stage 3
35-36 Motor fault, stage 4
19-20 Fan fault
21-22 Fault, 1 or 2 electric stages
Or 23-24 Operation of auxiliary heaters, stage 3 or 4
Additional 25-26 Operation of auxiliary heaters, stage 1 or 2
relay board 1 27-28
circuit with aux. heaters 29-30
if P3 = 1 when P22 = Yes 31-32
33-34
35-36
4 DESCRIPTION
4.1 Main b oard
Main board for units with one non-reversible refrigerating circuit:

Analogue inputs:
Acquire signals measured by temperature sensors.
Acquire signals measured by pressure by sensors.

On/Off inputs:
Acquire operating state signals from surrounding
electromechanical components.

Actions:
Comparison of setpoint and water temperature to calculate which
stages are to be turned on or off.
Management of the protections for the machine
‟s self-adjusting
operation.

Outputs:
Control stage control.
Pump control.
General fault.

The board also features:
-
An “end-of-line resistance” switch.
4.2 Expansion (additional) boards 1 and 2
These boards are used for units with two reversible refrigerating circuits.
They manage the inputs/outputs on the second circuit or required for reversing the circuits.

Analogue inputs:
Acquire signals measured by temperature sensors.
Acquire signals measured by pressure by sensors.

On/Off inputs:
Acquire operating state signals from surrounding
electromechanical components.

Outputs:
Control stage control.
Main
board
Additional
board
Dimensions of boards
Main board
Width: 105 mm
Length: 208 mm
Thickness: 65 mm
Mounting centre distance:
95 × 198 mm
Additional board
Width: 60 mm
Length: 157 mm
Thickness: 40 mm
Mounting centre distance:
50 × 147 mm