SAIA-BURGESS PCD3.A460 A1 Product Description

Overview

SAIA-BURGESS PCD3.A460 A1 is a Saia Burgess Controls PCD3 digital transistor output module, ordered as type PCD3.A460 and identified here with suffix A1. The module provides 16 transistor outputs for the Saia PCD3 PLC system, using a 34-pole ribbon cable connector for field I/O wiring. It is designed to switch low-voltage DC control loads in building automation, industrial control panels, machinery and process installations. The PCD3.A460 is used as a replacement digital output spare in existing Saia PCD control systems originally equipped with this module type.

Features

PCD3.A460 provides 16 electrically connected digital transistor outputs. Output current ranges from 5 mA to 500 mA per output, with leakage current maximum 0.1 mA. Within the 5 to 24 V DC load voltage range, load resistance should be at least 48 Ω. Total module current is 8 A at 100 percent duty cycle. Operating mode is source operation, also described as positive switching.

The module supply or load voltage range is 10 to 32 V DC, with maximum 10 percent ripple. Voltage drop is ≤0.3 V at 0.5 A. Output delay is typically 50 μs and maximum 100 μs under ohmic load. Interference immunity follows IEC 801-4, with 4 kV under direct coupling and 2 kV under capacitive coupling for the whole trunk group. Internal current consumption from the +5 V bus is maximum 10 mA with all outputs set to 1, typically 8 mA; internal current consumption from the V+ bus is 0 mA.

The module has short-circuit protection and uses a 34-pole ribbon cable connector. Ready-made PCD2.K2xx system cables, PCD2.K5xx I/O connection adapters, or relay interface modules can be used to connect larger cable cross-sections or external relays. Output LEDs are provided for outputs 0 to 15. The datasheet recommends separate protection for each module with a fast-blow S fuse of maximum 8 A. If the module is used on base address 240 with the watchdog, the last input at address 255 cannot be used. Module weight is 80 g.

Specs

Brand: SAIA-BURGESS, Saia Burgess Controls Series: PCD3 PLC I/O system Model: PCD3.A460, suffix A1Product type: Digital transistor output module Number of outputs: 16, electrically connected Output type: Transistor, source operation, positive switching Output current: 5 mA to 500 mA per output Leakage current: Maximum 0.1 mALoad resistance requirement: At least 48 Ω within 5 to 24 V DCTotal module current: 8 A at 100 percent duty cycle Voltage range: 10 to 32 V DC, maximum 10 percent ripple Voltage drop: ≤0.3 V at 0.5 AOutput delay: Typical 50 μs, maximum 100 μs, ohmic load Interference immunity: IEC 801-4; 4 kV direct coupling, 2 kV capacitive coupling Internal bus current: Maximum 10 mA from +5 V bus, typical 8 mA; 0 mA from V+ bus Output protection: Short-circuit protection Connector: 34-pole ribbon cable connector Status indication: LEDs for outputs 0 to 15 Recommended module protection: Fast-blow S fuse, maximum 8 AAccessory cables: PCD2.K2xx system cables; PCD2.K5xx adapters; PCD2.K551 or K552 relay interfaces Weight: 80 gProduct status: Saia PCD3 replacement digital output module spare

Principle

The PCD3.A460 receives output commands from the Saia PCD CPU over the PCD3 backplane or module bus. Each transistor output switches the connected DC load in sourcing mode, supplying positive DC output voltage or current to the external load when commanded on. The 34-pole ribbon cable connector carries the 16 output signals and associated return or common wiring to the field terminal adapter, relay interface or system cable.

Short-circuit protection protects the transistor outputs and connected DC circuits under overload or wiring fault conditions. LEDs reflect output state for panel diagnostics. The module should be protected by a separate fast-blow fuse, and I/O modules or terminal blocks should be plugged in or removed only after the Saia PCD and external +24 V supply are disconnected. Replacement should verify the module address, ribbon cable orientation, load voltage, current per output, total module current, adapter or relay interface type, and PLC hardware configuration before commissioning.

Applications

SAIA-BURGESS PCD3.A460 is used for digital DC control output in building automation, HVAC control, lighting control, valve and damper control, pump and fan interlocking, relay or contactor interface, packaging machinery, production lines, material handling, machine tools, process equipment, utilities, water and wastewater, and general Saia PCD3 PLC control panels. It drives solenoid valves, indicator lamps, relays, contactor coils, warning devices, small DC actuators and other 10 to 32 V DC control loads. In existing PCD3 installations, the module serves as a direct replacement digital output spare matched to the original slot, ribbon cable, terminal adapter and PLC configuration.