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8
3.8 - Connections at the customer terminal block
3.8.1 - Terminal block connections
The following table summarizes connections at the user
terminal block. Some contacts can be accessed only when
the unit operates in Remote mode.
Description
Board
Connector
Remarks
Remote on/off contact
SIOB
J1-DI01; 32-33
Used for the unit on/off control if the unit is in Remote mode:
open = Unit is stopped; closed = Unit is allowed to start in Cooling
Remote setpoint contact
SIOB
J1-DI02; 65-66
Used to control the setpoint
Demand limit contact
SIOB
J1-DI03; 63-64
Used to control demand limit
Heat recovery
SIOB
J1-DI04; 73-74
Not available in software version 1.0
Customer interlock
SIOB
J1-DI05; 34-35
Used to control the unit by the customer:
open = Unit is stopped and an alarm is triggered (alarm 10028)
Evaporator pump 1
SIOB
J2/J4-IN01/DO01; 90
Used to command the control of evaporator pump 1
Evaporator pump 2
SIOB
J2/J4-IN02/DO02; 90A
Used to command the control of evaporator pump 2
Alarm relay
SIOB
DO-05; 30A-31A
Indicates alarms
Running relay
SIOB
DO-06; 37-38
Indicates if the unit is ready to start or operating
Setpoint reset
SIOB
AI10 (A1A); 71-72
Used for setpoint reset control
Occupancy override
SIOB, EMM
DI-01; 77-78
Enables to switch between occupied (closed contact) and unoccupied
mode (open contact), applicable to units operating in Local mode
Demand limit contact 2
SIOB, EMM
DI-02; 73A-74A
Used to control demand limit
Customer interlock (EMM option) SIOB, EMM
DI-03; 34A-35A
Used to control the unit by the customer:
closed = Unit is stopped and an alarm is triggered (alarm 10014)
Ice done contact
SIOB, EMM
DI-04; 75-76
Used for ice storage control
Unit partially shutdown
SIOB, EMM
DO-05; 30B-31B
Indicates the shutdown of one of the circuits
Unit shut down
SIOB, EMM
DO-06; 30-31
Indicates the unit shutdown
Chiller running or ready to start
SIOB, EMM
DO-04; 37A-38A
Output closed when the chiller is ready to start or running
Compressor A running
SIOB, EMM
DO-01; 37A1-38A1
Output closed when the compressor of circuit A is running
Compressor B running
SIOB, EMM
DO-02; 37B1-38B1
Output closed when the compressor of circuit B is running
Chiller capacity
SIOB, EMM
AO-01; 79+ - 79-
Chiller total capacity
Space temperature
SIOB, EMM
AI-01; 71A-72A
Space temperature input for setpoint reset function
Capacity limit (analogue)
SIOB, EMM
AI-10; 67-68
Analogue capacity limit command
3.8.2 - Volt-free on/off contact
When the unit is under remote control, the on/off contact is
operating as follows:
Contact
Off
Cooling
On/Off contact
open
closed
Off:
Unit is stopped
Cooling: Unit is allowed to start in Cooling
3.8.3 - Volt-free setpoint selection contact
When the unit is under remote control, the volt-free contact
is used to determine the active setpoint. This dry contact is
used to switch between setpoints.
Contact
Active Setpoint
SP1
SP2
Setpoint selection contact
open
closed
3.8.4 - Volt-free demand limit selection contact
Up to two dry contacts can be used to limit unit capacity.
Note that the second contact is available only for units with
the energy management module. Capacity limitation with
two contacts is as follows:
Contact
100%
Limit 1
Limit 2
Limit 3
Demand limit 1 contact
(LIM_SW1)
open
closed
open
closed
Demand limit 2 contact
(LIM_SW2), EMM option
open
open
closed
closed
Please note that limit thresholds can be defined via the user
interface in the Setpoint menu.
3.8.5 - Ice storage (EMM)
For units with EMM option, the control includes an additional
setpoint (“ice setpoint”) used for ice storage control.
Contact
Cooling setpoint
Setpoint 1
(CSP1)
Setpoint 2
(CSP2)
Ice setpoint
(ICE_STP)
Occupancy schedule occupied
unoccupied
unoccupied
Ice done switch
(EMM option)
open/closed
closed
open
3.8.6 - Customer interlock
The customer interlock available on the SIOB board and
connected in serial with the electrical box thermostat can be
used by the customer in order to control the state of the unit.
When the interlock is open, the unit will be stopped and the
alarm will be triggered (alarm 10028).
3.8.7 - Occupancy override (EMM)
The occupancy override contact is available in case of units
fitted with the optional Energy Management Module. When
the unit is operating in Local mode and the contact is closed,
the unit is in occupied mode. At the same time, open
occupancy contact means that the unit is in unoccupied mode.
Summary of Contents for TOUCHPILOT 30KAV
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