Operation Manual
Document nr. : 053682
Version : V1.1
MC 795D
Client : General
Page : 4 of 16
In- and outputs
Sensors
: Humidity sensor 1 (3-wire, V+=12V, Sign.:0-1V, 0V)
Humidity sensor 2 (3-wire, V+=12V, Sign.:0-1V, 0V)
Humidity sensor 3 (3-wire, V+=12V, Sign.:0-1V, 0V)
Humidity sensor 4 (3-wire, V+=12V, Sign.:0-1V, 0V)
Digital inputs
: Night offset input (potential free input contact)
External alarm input (potential free input contact)
Analog output
: 2x 0/+10Vdc, Rbmin 10Kohm, programmable.
Relay outputs
: RY1 Alarm (C/NO/NC, 250Vac/10A not inductive)
Normally C-NO is closed, at alarm C-NC is closed.
The next relays have a central common;
RY2 Relay 2 programmable (NO, 250Vac/10A not inductive)
RY3 Relay 3 programmable (NO, 250Vac/10A not inductive)
RY4 Relay 4 programmable (NO, 250Vac/10A not inductive)
RY5 Relay 5 programmable (NO, 250Vac/10A not inductive)
2
Functional specifications.
To the MC 795D hygrostat a maximum of four humidty sensors can be connected. These sensors can
be used as control sensor, info sensor or alarm sensor.
A maximum for four different setpoints can be programmed.
The MC 795D has the control functions dehumidifying or humidifying. Also has the controller an alarm
relay, which becomes active as soon as the alarm levels are exceeded, a sensor is broken or the
external alarm input is closed.
The MC 795D has two analog outputs with a range of 0/+10Vdc. The function of these outputs can be
programmed as measuring signal, setpoint signal or a P(I) control for dehumidifying or humidifying.
The controller has two digital input contacts. The first contact is used as night offset input, the second
contact as external alarm.
The above mentioned settings are made via the Internal Parameters.
To allow also other combinations between setpoints, sensor and relays, there is the Advanced
Programming. This mode is only advisable for advanced users.