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Products: DI-16
Functionalities: Central IO , Engineering, Hardware, Smoke Control
Product version: 3.3, 2022, 2023, 2024


arrow1_rotationIntroduction arrow1_rotationFunction arrow1_rotationSpecifications
action_zoom_plus_stroke Central IO module DI-16

Central IO module DI-16


SpaceLogic* DI-16 Central IO module is a digital input, 16-channel I/O module.

The digital inputs can be used for cost effective sensing of multiple dry contact digital inputs in applications, such as equipment status monitoring or alarm point monitoring. As counter inputs, digital inputs are commonly used in energy metering applications.

* Formerly known as SmartX.


Modular and scalable system

The modules are part of a modular system that delivers power and communications on a common bus. Connecting modules is a one-step process: just slide the modules together using the built-in connectors.

Patented two-piece design

Each module can be separated from its terminal base to allow the site to be wired prior to the installation of the electronics. The patented locking mechanism serves as handles for removing the module from its base. All critical components have a protective cover that permits convection cooling to occur.

action_zoom_plus_stroke Two-piece design

Two-piece design

Hot-connect and Hot-swap

Because critical applications require 24-hour operation, Schneider Electric designed the Central IO modules for hot-connection of terminal bases and hot-swapping of the modules to their bases. This design ensures continuous power and communication during service operations.


The auto-addressing feature helps eliminating the need for setting DIP switches or pressing commission buttons. Each module automatically knows its order in the chain and assigns itself accordingly – significantly reducing engineering and maintenance time.

Simple DIN-rail installation

Fasteners easily snap into a locked position for panel installation. The fastener has a quick-release feature for easy DIN-rail removal.

Efficient terminal management

The Central IO module terminals are clearly labeled and protected by transparent covers. The input and output terminals are at the top and bottom of each module and are accessible for maintenance without removing the module. The EcoStruxure Building Operation WorkStation software can generate custom as-built labels for each module. Pre-perforated letter and A4 size label sheets are available as an accessory.

Accommodates multiple row panel installations

The SpaceLogic devices use built-in connectors for single row connectivity, side by side. If a panel size requires multiple rows, extension cords are available.

LED status indicators

The Central IO module has a status indicator that denotes the health and status of the module.

Each input channel has a dedicated two color status LED. The LED can be configured to display either red or green for each input state.


Protection components on the inputs protect against high-voltage short-duration transient events.


Input channels
DC input supply power
1.6 W
DC input supply voltage
24 VDC
Ambient temperature, operating
0 to 50 °C (32 to 122 °F)
Ambient temperature, storage
-20 to +70 °C (-4 to +158 °F)
Maximum humidity
95 % RH non-condensing
Plastic flame rating
Ingress protection rating
IP 20
Dimensions including terminal base
90 W x 114 H x 64 D mm (3.6 W x 4.5 H x 2.5 D in.)
Weight including terminal base
0.255 kg (0.56 lb)
Weight excluding terminal base
0.131 kg (0.29 lb)
Terminal base
Agency compliances
RCM; BS/EN 61000-6-3; FCC Part 15, Sub-part B, Class B
BS/EN 61000-6-2
Safety standards
BS/EN 61010-1; UL 916 C-UL US Listed
BS/EN 61326-1
Smoke control product safety
UL 864
Part numbers
DI-16, Central IO module
16 digital inputs
TB-IO-W1, terminal base for Central IO module
(Required for each Central IO module)
Accessory part numbers
DIN-RAIL-CLIP, DIN-rail end clip
package of 25 pieces
PRINTOUT-A4-W1, printout sheets for terminal labels
A4 sheet size, 100 sheets, 18 labels per sheet
PRINTOUT-LTR-W1, printout sheets for terminal labels
Letter sheet size, 100 sheets, 16 labels per sheet
S-CABLE-L, S-cable extension cord for the I/O bus, L shaped connectors
1.5 m
S-CABLE-L, S-cable extension cord for the I/O bus, L shaped connectors
0.75 m
Digital inputs
Dry contact switch closure or open collector/open drain, 24 VDC, 2.4 mA
Absolute maximum ratings
-0.5 to +24 VDC
LED polarity
Software selectable, if the LED is activated when the input is high or low
LED color
Red or green, software selectable
Minimum pulse width
120 ms
Minimum pulse width
20 ms
Maximum frequency
25 Hz

For protection from excess current that could be produced by field wiring, follow these instructions:

  • Connect one RET terminal on each of the Central IO modules to a common chassis/power ground rail in the control panel using a size 16 AWG (1.3 mm 2 ), or larger wire.

  • For more information on wiring, see the SpaceLogic Hardware Reference Guide.

  • RTD-DI-16
  • UI-16
  • AO-8 and AO-8-H
  • AO-V-8 and AO-V-8-H
  • DO-FA-12 and DO-FA-12-H
  • SpaceLogic DO-FC-8 and DO-FC-8-H
  • UI-8/AO-4 and UI-8/AO-4-H
  • UI-8/AO-V-4 and UI-8/AO-V-4-H
  • SpaceLogic UI-8/DO-FC-4 and UI-8/DO-FC-4-H