User Manual
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Siemens PXC-NRUF – Automation station, compact series CM2N9760en_07
Building Technologies 2015-12-23
Digital inputs
DI 17 ... 24
with counting function
As DI 9 ... 16; additionally countin
g function:
Counter frequency (symmetrical)
Min. closing/opening time incl. bouncing
Max. bounce time
Counter memory
Max. 25 Hz.
20 ms
10 ms
8 Bit (0...255
max. cycle time 10 s
at 25 Hz)
Counter inputs must be shielded,
if they count faster than 1 Hz and are routed
with analog inputs in the same trunking for more than 10 m.
Universal outputs
Can be configured in software
UO 1 ... 8
D/A resolution (analog out)
10 bit.
Modulating
Output voltage range
0 ... 11.0 V.
Output current
Max.
1.5 mA source,
max. 1.5 mA reduction.
Digital
Output voltage
0 / 10V
Output current
1.5 mA
Relay outputs
Number of switching outputs
16 (changeover contact)
DO 1 ... 16
External fuse protection for incoming cable
– Slow blow fusible link
Max. 10 A
– Circuit breaker
Max. 13 A
Circuit breaker tripping characteristic
Type B, C or D to EN 60898
Contact data
AC/DC switching voltage
max. AC 42 V / DC 42 V
min. AC / DC 12 V
AC current rating
Max. 4 A resistive, 3 A inductive
Min. 4 mA at AC 42 V
Min. 10 mA at AC 12 V
Current on make (AC)
Max. 10 A (1 s)
DC current rating
Max. 2 A resistive at DC 42 V
Min. 10 mA resistive at DC 12V
Response / dropout time
7 ms / 3 ms typical
Service life of contact for AC 42 V (guide values)
With 0.1 A resistive
1 x 10
7
switching operations
With 0.5 A resistive
3 x 10
6
switching operations
With 4.0 A resistive (N/O)
2 x 10
5
switching operations
Reduction factor with inductive load
0.85 (cos phi = 0.6)
Insulation resistance: Basic insulation
between relay outputs and system elec
-
tronics
AC 2500 V, to EN 60730-1
Interface room units.
Interface type
PPS2.
Feed category
4
Baud rate PPS2
4.8 kbps.
Interface LONWORKS bus.
LONWORKS FTT transceiver
(screw terminal).
Network
TP/FT-10.
Baud rate
78 kbps.
Protocol
BACnet.
Local communication
(HMI, RJ45).
PXM10 (RS
-232).
PXM20 (BACnet/LonTalk)
•
One operator unit PXM10 or PXM 20 can be connected per automation station.
• LONWORKS bus instead of the RS 485 bus used in Integral plants.