Honeywell SHC Montageanleitung Seite 7

Relay Outputs
The controller provides in total 4 relay outputs:
1 change-over (SPDT) relay, connected to terminals 12 to

14 and
 3 normally-open relays, connected to terminals 15/16,
17/18 and 19/20 according to terminal assignment (see
Table 1).
All four relays are designed for switching 230 VAC, 5 A.
relay mode
NOT_USED: The controller does not use the relay. It always remains OFF.
ALARM relay
REL_ALARM_DIRECT: The controller switches the relay ON if there is an alarm and OFF if there is no alarm.
mode
REL_ALARM_REVERSE: The controller switches the relay OFF if there is an alarm and ON if there is no alarm.
REL_SOL_NOT_USED: The controller does not use the relay. It always remains OFF.
REL_SOL_NO: If the flow of media in the refrigeration circuit has to be interrupted, the controller switches the
SOLENOID
relay ON. Otherwise, the relay is switched OFF.
relay mode
REL_SOL_NC: If the flow of media in the refrigeration circuit has to be interrupted, the controller switches the
relay OFF. Otherwise, the relay is switched ON.
REL_COMP_NOT_USED: The controller does not use the relay. It always remains OFF.
REL_COMP_PROTECT_DIRECT / REL_COMP_PROTECT_REVERSE: The compressor relay is used to protect
the compressor. In the event of a critical compressor situation, it is switched ON (direct) or OFF (reverse) to stop
COMPRESS
the compressor. If there is no critical situation, the relay is always OFF (direct) or ON (reverse). In device manual
OR relay
or remote mode, the compressor relay is switched to ON (direct) or OFF (reverse).
mode
REL_COMP_CONTROL_DIRECT / REL_COMP_CONTROL_REVERSE: The compressor relay is used to switch
on and off the compressor depending on start-up, cold store, reversing / defrosting. This value can be set only if
the COLD STORE supervision function is enabled.
REL_REV_REQ_NOT_USED: The controller does not use the relay. It always remains OFF.
REVERSE REL_REV_REQ_DIRECT: The controller switches the relay ON as long as refrigeration circuit has to be reversed.
relay mode
REL_REV_REQ_REVERSE: The controller switches the relay OFF as long as refrigeration circuit has to be
reversed.
REL_ICE_DETECT_NOT_USED: The controller does not use the relay. It always remains OFF.
ICE
DETECTION REL_ICE_DETECT_DIRECT: The controller switches the relay ON as long as ice is detected.
relay mode
REL_ICE_DETECT_REVERSE: The controller switches the relay OFF as long as ice is detected.
Table 5. Factory default settings of relay outputs
relay output terminals
1 15, 16
2 17, 18
3 19, 20
4 12, 13, 14
Further factory default settings are available, upon request.
Table 4. Relay modes and corresponding constraints
relay mode default setting
unused none
unused none
unused none
alarm reverse mode
OEM SHC CONTROLLER – INSTALLATION INSTRUCTIONS
NOTES:
 If the product is mounted on the wall or in an installation
cabinet to which unauthorized personnel has access, the
relays must not be used for switching line voltage
(230 Vac).
 Alarm relay without power must be recognized as "alarm"
if used.
 In case of relays switching line voltage, two neighboring
relays must switch the same phase, only.
 The change-over relay is always used as the alarm relay.
Each relay may be configured according to different relay
mode as described in Table 4.
 To switch a relay ON means to energize the relay coil.
constraints / descriptions
Temperature Inputs (AIN1, AIN2)
The SHC Controller has two temperature inputs (AIN1, AIN2
= terminals 21-23) which can be configured for PT1000,
NTC10K, and NTC20K temperature sensors.
Accuracy (without sensor)
The accuracy of AIN1 and AIN2 configured for PT 1000
temperature sensors is max. ±0.5 K in the range of -70 ...
+120 °C.
The accuracy of AIN1 and AIN2 configured for NTC10K or
NTC20K temperature sensors is max: ±0.2 K in the range of -
40 ... +120 °C.
7 MU1B-0441GE51 R0710B