Technical specifications - Facility Explorer - Part No. 24-10144-173 - FX-PCX2721-0 - Field Device - FX-PCX27 Expansion Input/Output Module

FX-PCX2721 Expansion Input/Output Module Installation Instructions

Product name
FX-PCX27 Expansion Input/Output Module
Document type
Installation Guide
Document number
Part No. 24-10144-173
Document revision
Revision date
Table 1. FX-PCX2721 technical specifications

Product Code Number

FX-PCX2721-0 Expansion Input/Output Module

Power Requirement

24 VAC (nominal, 20 VAC minimum/30 VAC maximum), 50/60 Hz, power supply Class 2 (North America), Safety Extra-Low Voltage (SELV) (Europe)

Power Consumption

14 VA maximum FX-PCX2721

Ambient Conditions

Operating: 0°C to 50°C (32°F to 122°F); 10% to 90% RH noncondensing

Storage: -40°C to 80°C (-40°F to 176°F); 5% to 95% RH noncondensing


DIP switch set; valid expansion module device addresses 4–127 (Device addresses 0–3 and 128–255 are reserved and not valid expansion module addresses)

Communications Bus

BACnet MS/TP, RS-485:

3-wire FC Bus between the supervisory controller and other controllers or expansion modules (for MS/TP bus communications at 38,400 baud)

4-wire SA Bus between expansion module, network sensors and other sensor/actuator devices, includes a lead to source 15 VDC supply power (from controller or expansion modules) to bus devices (for MS/TP bus communications at 38,400 baud)


H8SX/166xR Renesas® 32-bit microcontroller


640 KB Flash Memory and 128 KB Random Access Memory (RAM)

Input and Output Capabilities

8 - Universal Inputs: Defined as 0–10 VDC, 4–20 mA, 0–600k ohm, or Binary Dry Contact

2 - Analog Outputs: Defined as 0–10 VDC or 4–20 mA


Input/Output: Fixed Screw Terminal Blocks

SA/FC Bus and Supply Power: 4-Wire and 3-Wire Pluggable Screw Terminal Blocks


Horizontal on single 35 mm DIN rail mount (preferred), or screw mount on flat surface with three integral mounting clips on expansion module


Enclosure material: ABS and polycarbonate UL94 5VB; self-extinguishing, plenum-rated

Protection Class: IP20 (IEC529)

Dimensions (Height x Width x Depth)

150 mm x 164 mm x 53 mm (5-7/8 in. x 6-1/2 in. x 2-1/8 in.) including terminals and mounting clips

Note: Mounting space requires an additional 50 mm (2 in.) on top, bottom, and front face of expansion module for easy cover removal, ventilation, and wire terminations.


0.5 kg (1.1 lb)


United States: UL Listed, File E107041, CCN PAZX, UL 916, Energy Management Equipment

FCC Compliant to CFR47, Part 15, Subpart B, Class A

Canada: UL Listed, File E107041, CCN PAZX7 CAN/CSA C22.2 No.205, Signal Equipment

Industry Canada Compliant, ICES-003

Europe: Johnson Controls declares that this product is in compliance with the essential requirements and other relevant provisions of the EMC Directive.

Australia and New Zealand: RCM Mark, Australia/NZ Emissions Compliant

The performance specifications are nominal and conform to acceptable industry standard. For application at conditions beyond these specifications, consult the local Johnson Controls® office. Johnson Controls shall not be liable for damages resulting from misapplication or misuse of its products.