Saia PCD1 series compact programmable controller

Overall positioning of the product

Saia PCD1 is Saia PCD ®  The series’ smallest flat structured programmable controller is designed for small and medium-sized automation tasks, with high integration, rich communication and Web/IT functions. All models integrate at least 18 I/O channels and support modular expansion.

Details of the three core models

1. PCD1. M2 series (basic compact type)

Model: PCD1.M2160 (Ethernet+large memory), PCD1.M2120 (Ethernet), PCD1.M2020 (no Ethernet)

Structure: 2 I/O expansion slots, supporting PCD2 I/O/communication modules

Core capability: Local maximum expansion of 50 I/O points, up to 8 communication interfaces

Installation: DIN rail (2 × 35mm) or flat installation

Size: 142 × 226 × 49mm, IP20 protection

Parameter PCD1.M2160 PCD1.M2120 PCD1.M2020

Program flash 1MB 512KB 512KB

User RAM 1MB 128KB 128KB

User flash memory 128MB 8MB 8MB

Is Ethernet present or not

2. PCD1. Room Controller, PCD1.M2110R1）

Positioning: Room Automation/HVAC Dedicated

Integrated I/O: 24 channels, including 6DI/6DO/6AI/2AO

Expansion: 1 I/O slot, supporting DALI/BACnet/MS/TP, etc

Communication: dual network ports USB、RS-485， Built in web server

Applicable: Fan coil units, air conditioning, lighting, curtains, air quality control

Parameter PCD1.M2110R1

Program flash 256KB

User RAM 128KB

User flash memory 8MB

Ethernet has

3. E-Controller（PCD1.M0160E0）

Positioning: Dedicated for cabinet installation and energy consumption data collection

Pre installed: S-Monitoring energy consumption monitoring program

Integrated I/O: 18 channels, no expansion slot

Communication: dual network ports USB、RS-485

Installation: DIN rail (1 × 35mm) or flat surface

Size: 142 × 142 × 60mm

Parameter PCD1.M0160E0

1MB program flash memory

User RAM 1MB

User flash memory 128MB

Ethernet has

General hardware specifications

Power supply: 24VDC (-20%~+25%), ripple ≤ 5%

Working temperature: 0~55 ℃

Power consumption: typical 12W

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

On board I/O commonality: 6-channel digital input, 2-channel analog input, digital output PWM、 Watchdog relay

Communication and Expansion Capability

Onboard communication

Standard configuration: USB 1.1, RS-485 (up to 115kbps)

Ethernet: M2160/M2120/Room/E with dual port switch (10/100M)

Expand communication module

Slot A：PCD7.Fxxx（RS-232/RS-485/MP-Bus）

I/O slot: PCD2. Fxxx (BACnet/LON/DALI/M-Bus)

Storage Expansion (M1 Slot)

PCD7.R550M04 (4MB), R560/R562 (BACnet), R580/R582 (LON IP), SD card expansion

Accessories and software

Programming software: Saia PG5

Consumables: CR2032 battery, plug-in terminals, housing cover plate

Engineering: EPLAN P8 macro file support

Analog output: PCD7.W600 (12 bits, 0~10V, under development)

Typical application scenarios

Automation of small devices and upgrading of old systems

Room HVAC, Lighting, Sunshade Control

Energy consumption data collection, communication gateway

Distribution box/narrow space installation control

Key issues

Question 1: What are the core differences among the three major models of PCD1 in terms of I/O quantity, expansion capability, and specialized functions?

Answer: PCD1.M2 is a universal type, with 18 integrated I/O and 2 expansion slots, and no dedicated functions; PCD1. Room is dedicated for room control, with 24 integrated I/O channels and 1 expansion slot, supporting HVAC and web remote control; E-Controller is dedicated for energy consumption monitoring, with 18 integrated I/O channels without expansion slots, and pre installed S-Monitoring.

Question 2: What are the onboard communication interfaces of the PCD1 series, and what are the mainstream industrial protocols that can be extended?

Answer: The onboard standard includes USB and RS-485, and some models come with dual port Ethernet; Scalable protocols include RS-232, BACnet MS/TP, LON, DALI, M-Bus, Belimo MP Bus, etc.

Question 3: What are the general hardware parameters of the PCD1 series, such as power supply, operating temperature, protection level, and data backup?

Answer: Power supply 24VDC, working temperature 0-55 ℃, protection IP20, data backup using CR2032 lithium battery (lifespan 1-3 years), typical power consumption 12W.