Siemens PXC Modular Series User Manual

Hardware Features
Unitary Equipment Controller
84
| 100
Siemens Industry, Inc.
Technical Reference Manual
145-172
Building Technologies
Restricted
2018-09-25
Electrical
Power Requirements 24 Vac ±20% input @ 50/60 Hz
Power Consumption (Maximum) 20 VA @ 24 Vac (18 VA on new 16 point models.)
A/D Resolution (analog in) 16 bits
D/A Resolution (analog out) 10 bits
AC Power and Digital Outputs NEC Class 1 Power Limited
Communication and all other I/O NEC Class 2
Digital Input
Configurable Points
Points 1-
16
Contact Closure Sensing
Dry Contact/Potential Free inputs only
Digital Input (10 ms settling time)
Supports counter inputs up to 20 Hz, minimum
pulse duration 20 ms (open or closed)
Digital Output
Dedicated Points
Points 20-
24
Class 1 Relay
Form-C (NO and NC contacts)
125 Vac, 4A
250 Vac, 2A
Configurable Points
using an external relay
Points 13-
16
0 to 24 Vdc, 22 mA max.
Analog Output
Dedicated Points
Points 17-
19
0 to 10 Vdc @ 1 mA max.
Resolution: 11 mV
Initial Accuracy: ±2% of full range (32°F to 122°F
(0°C to 50°C) ambient)
Analog Output
Configurable Points, 0 to 10 Vdc
Points 4-
16
0 to 10 Vdc @ 1 mA max.
Resolution: 11 mV
Initial Accuracy: ±2% of full range (32°F to 122°F
(0°C to 50°C) ambient)
Configurable Points, 0 to 20 mA
Points 13-
16
0 to 20 mA @ 650 Ω max.
Resolution: 22 µA
Initial Accuracy: ±2% of full range (32°F to 122°F
(0°C to 50°C) ambient)
Analog Input
Configurable Points
Points 1-
16
Voltage (0-10 Vdc) Resolution: 2.2 mV
Current (4-20 mA) Resolution: 4.4 µA
1K Ni RTD @ 32°F (Siemens, JCI, DIN Ni 1K) Resolution: 0.05 C
1K Pt RTD (375 or 385 alpha) @ 32°F Resolution: 0.08 C (375), 0.13 C (385)
10K NTC Type 2 or Type 3 Thermistor Resolution: 0.02 C to 0.10 C
100K NTC Type 2 Thermistor Resolution: 0.14 C to 0.02 C

Siemens PXC Modular Series Specifications

General

Brand	Siemens
Model	PXC Modular Series
Category	Control Unit
Language	English