Saia-Burgess Controls AG
Manual for PCD7.L79xN room controllers
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Document 27 / 602
E
N02 │ 2013-11-27
Room controllers with Serial S-Net
Technical data
6-3
6
6.1.3 Technical overview of room controllers PCD7.L790N - .L793N
Service Pin
Inputs
Serial S-Net
Power supply
Valve
S-Bus
RS485
Service
Pin
/D
D
E1
E2
Aux
Input
Window
Contact
Y1
24V
24V
800 mA
PCD7.L793N
3
1
2
6
4
5
6
7
8
8
7
5
2
4
3
1
Power
Supply
24VAC
Y2
Y4
Y3
E3
0-10V
2mA
Aux.
0-10V
A
B
-
+
Designation
Terminal
Description
Power supply
24 V, GND
Power consumption 1.5 W typ. without actuating
drives
Outputs
Valves Y1/Y2
Y1, N, Y2
Triac outputs, 10…800 mA to control 2 valves with
PWM signal or one 3-point valve (open/close).
Can be configured via the Config FBox or the
configuration registers. When Y1 and Y2 are used
at the same time, then the max. output current will
be 800 mA for both combined.
Valves Y3/Y4
Y3, N, Y4
Constant-voltage outputs 0 ... 10 V, 2 mA max. for
control of two valves.
Inputs
Window contact
E1, window
contact
Digital input for floating contacts. When the window
is open, the controller automatically switches to
"Frost protection" mode. The contact polarity (NOC/
NCC) can be set in a configuration register. See
description of Config FBox or registers
Additional input
E2, aux input
Additional digital input for floating contacts. The
control function of the aux. input can be set in the
configuration. It can be configured as inactive, as a
2nd window contact, a presence sensor, dew point
monitor or change-over contact. See description of
Config FBox or registers
Voltage input
E3, Aux
0…10 V
Voltage input 0...10 V for optional use via S-Bus.