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
6-1
6
6
Technical data
6.1
Room controllers with Serial S-Net
PCD7.L79xN Technical overview
Type Description
PCD7.L790N 24 VAC compact room controller for heating or cooling with 1 TRIAC
output, an integrated temperature sensor and 2 digital inputs, without
user control
PCD7.L791N 24 VAC compact room controller for heating or cooling with 2 TRIAC
outputs, an integrated temperature sensor and 2 digital inputs, without
user control
PCD7.L792N 24 VAC compact room controller for heating or cooling with 2 TRIAC
outputs, an integrated temperature sensor and 2 digital inputs, with
analogue operation for set-point setting and presence sensor with LED
display
PCD7.L793N 24 VAC compact room controller for heating or cooling with 2 TRIAC
outputs, 2 × 0…10 V outputs, an integrated temperature sensor, 2
digital inputs, one 0…10 V input, with analogue operation for set-point
setting and presence sensor with LED display
6.1.1 Performance data for Serial S-Net
Saia PCD
®
PCD3.M5540
Resources
90 Room FBoxes
Registers
2600
Flags
1400
Data blocks
1
Program
approx. 50,000 lines
Interface
Channel 2, 38 400 baud
Program cycles
360 cycles
Communication cycle
1.4 seconds
At a communication rate of 38,400 baud, communication for a Room FBox takes
approx. 15 ms. Only when the Saia PCD
®
program takes longer than 15 ms per
Saia PCD
®
cycle does this value have to be used as a basis for estimating the
communication cycle.
Communication cycle = "15 ms per Room FBox" × "Number of Room FBoxes"
