SAIA PCD1 Controller Full Series

SAIA PCD1 series programmable controller: compact automation core

In the fields of building automation, industrial control, and energy management, there are increasingly high requirements for the flexibility, communication capabilities, and cost-effectiveness of controllers. Saia PCD1 series as Saia PCD ®  The smallest flat programmable controller in the family, with powerful CPU, integrated I/O, rich communication interfaces, and modular expansion capabilities, provides an ideal solution for small to medium-sized automation tasks. This article will provide a comprehensive and in-depth technical analysis of the system from the perspectives of series overview, technical specifications of the three main sub series (PCD1.M2xxx, PCD1.Room, PCD1 E-Controller), I/O configuration, communication expansion, installation methods, and typical applications.

Overall positioning of PCD1 series

The Saia PCD1 system adopts a compact and flat design, with all controllers integrated with at least 18 I/O points, and comes standard with data storage, Web/IT functionality (automation server), and multiple standard communication interfaces. Its powerful CPU is capable of successfully addressing small automation challenges. Rich communication options: Ethernet TCP/IP, USB port, onboard RS-485 interface, and via BACnet ®  Or extension options such as Lon IP fully demonstrate the performance potential of PCD1.

According to application scenarios, the PCD1 series is divided into three main branches:

PCD1.M2xxx: Universal compact controller, modular expansion, suitable for small and medium-sized equipment and renovation projects.

PCD1. Room (M2110R1): A controller designed specifically for room automation and HVAC (HeaVAC), suitable for indoor installation.

PCD1 E-Controller (M0160E0): An energy monitoring controller specifically designed for installation in distribution boxes, pre installed with S-Monitoring functionality.

PCD1.M2xxx Series: Compact and Scalable Universal Controllers

The PCD1.M2xxx series is a compact controller with onboard I/O and two additional I/O slots (for PCD2 I/O modules or communication interface modules). Its web/IT functionality, onboard storage, standard communication interfaces, and expansion options provide a good solution for small and medium-sized devices.

2.1 System Characteristics

Up to 50 inputs/outputs can be expanded (in conjunction with RIO PCD3.T66x or T76x)

Up to 8 communication interfaces

Onboard USB and Ethernet interfaces

Large capacity onboard program storage (up to 1 MByte) and data storage (up to 128 MByte file system)

Automated server, integrated with web/IT systems (Flash file system, FTP, web server, etc.) Email、SNMP）

2.2 Model and Memory Configuration

Model Program Flash User RAM File System

PCD1.M2160 (with Ethernet) 1 MB 1 MB 128 MB

PCD1.M2120 (with Ethernet) 512 kB 128 kB 8 MB

PCD1.M2020 (without Ethernet) 512 kB 128 kB 8 MB

2.3 Integrated Communication

Ethernet: 10/100 Mbit/s, dual port switch, full duplex, adaptive, auto crossover (M2160/M2120 only)

USB: USB 1.1 device, 12 Mbit/s

RS-485: Through terminal X3, up to 115 kbit/s

2.4 Onboard I/O (all M2xxx models)

Input:

6 digital inputs (2 of which can be interrupted): 15... 30 VDC, input filtering 8 ms/0.2 ms (optional), terminal X1

2-channel analog input (selected through DIP switch): -10...+10 V, 0... ± 20 mA, Pt1000, Ni1000, Ni1000 L&S, 0... 2.5 k Ω, 12 bit resolution, terminal X1

output:

4-channel digital output: 24 VDC/0.5 A, terminal X0

1-channel PWM output: 24 VDC/0.2 A, terminal X0

Configurable (via PG5 software):

4-channel digital input or output (terminal X0): 24 VDC, can be used as input or output

1-channel watchdog relay or normally open contact: 48 VAC/VDC, 1 A (DC inductive load requires parallel freewheeling diode), terminal X3

2.5 Power Supply and General Parameters

Supply voltage: 24 VDC (-20%/+25%), with a maximum ripple of 5%, in compliance with EN/IEC 61131-2

Data backup battery: lithium button battery CR2032, with a lifespan of 1-3 years

Working temperature: 0... 55 ° C

Dimensions (W × H × D): 142 × 226 × 49 mm

Installation method: Two 35mm top cap rails (DIN EN60715 TH35) or flat installation

Protection level: IP20

Internal 5V bus capacity: maximum 500 mA; Internal 24V capacity: maximum 200 mA

Typical power consumption: 12 W

2.6 I/O and Communication Expansion

Slot I/O 0 and I/O 1: Can be inserted into PCD2.M5 series I/O modules or PCD2.F2xxx communication interface modules (up to 2 F2xxx modules, providing up to 4 interfaces).

Slot A: Can accommodate PCD7. F1xxx communication expansion modules (such as RS-232, RS-485/422, Belimo MP Bus, etc.).

Slot M1: Can insert PCD7.Rxxx memory modules for expanding file systems or activating BACnet IP/LON IP firmware.

New analog output module PCD7.W600 (12 bits, 0... 10V, developed specifically for PCD1, inserted into slot A).

2.7 Supported Communication Expansion Modules (Partial)

PCD7.F1105: Non isolated RS-485/RS-422, 40 mA (5V)

PCD7. F1215: RS-232 (including hardware handshake), 15 mA, supports modems EIB

PCD7. F1505: Isolation type RS-485, can activate terminal resistor, 130 mA

PCD7.F1805：Belimo MP‑Bus， Up to 8 drivers, 15 mA+15 mA (24V)