Trusted High Integrity Power Supply System

(110-240 Vac and 24 Vdc)

Product Overview 

The Trusted® power supply assembly converts redundant main line voltages of either 110

Vac / 240 Vac or 24 Vdc, to +15 Vdc or +24 Vdc output power for system and field power

requirements.

Features:

• Redundant power inputs.

• 250 W.

• Hot replaceable.

• Current sharing.

• Power factor correction.

• Front panel indicators for input, output voltage status and output current level on each

module.

• External status signals.

• TϋV Certified IEC 61508 SIL 3.

Description

The Power Supply Assembly consists of a Power Supply Chassis containing up to six Power

Supply Modules. The Chassis may be configured to distribute power in various

combinations. For example, a Chassis containing six Power Supply Modules may be set up

with three Modules providing triplicated power for Regent+Plus Input/Output (I/O)

assemblies and three Modules providing field power in a N+1 configuration. Alternatively,

the Chassis may be set up to provide separate dual 24 Vdc supplies for both a Trusted

System and associated field devices.

Power Supply Chassis

The Power Supply Chassis houses a maximum of six Power Supply Modules. It may be

mounted in a 19-inch rack or flush mounted on a panel. Table 1 identifies the available

types of Chassis.

The maximum recommended I/O cable length is 15 m. Cables longer than this may be specified if 

necessary but may suffer from voltage drop, offset, crosstalk and noise and will present materials 

handling problems.  

Internal cables are designed for cables where they are terminated in adjacent enclosures. If the 

cable needs to leave the enclosure environment, the external cable has more protection. Note that 

the ‘external’ cables are not armoured and are not suitable for truly external use and must still be 

treated with care. These cables will need protection when drawn through a cable route, and should 

also not be pulled by the connector(s). They should enter cabinets through transit/compression 

blocks and cannot be glanded. 

The Companion Slot cables described in this document allow hot-swap modules to be sited in 

adjacent slots using a double width chassis socket. For SmartSlot cables, allowing a remote slot to 

be assigned as necessary for a hot-swap, refer to Trusted I/O SmartSlot Cables, publication ICSTT

RM313 (PD-TC500). 

Trusted I/O Companion Slot Cables 

Product Overview 

This document provides detailed information for the types of Trusted® input/output (I/O) Cables 

available within the Companion Slot group. These types of cable provide connection facilities 

between the Trusted analogue and digital I/O modules, and Trusted Field Termination Assemblies 

(FTAs) or Trusted Versatile Field Termination Assemblies (VFTAs) as required. Cables are also 

available with a ‘flying lead’ at one end to allow connection to conditioned terminals. 

The types of Trusted I/O Companion Slot Cables currently available are listed in Table 1 on page 4. 

The cables are manufactured to user’s requirements; therefore length and type of cable insulation 

must be specified. Length must be specified to the nearest 0.5 m in the format xmx, e.g. 2m0 for a 

cable length of 2.0 m. This detail must be added to the end of the part number. Note that some 

cable lengths are preferred options and may be easier to obtain; please refer to Rockwell 

Automation for details. The type of cable insulation forms part of the cable part number and is 

denoted by 02 for Low Smoke Zero Halogen (LSZH) or 03 for UL Certified cable material. 02 is also 

flame retardant to IEC 60332-3 Cat A. When ordering cables, it is recommended that the user 

supplies the details as shown in Table 1. 

Description 

The Trusted 40 Channel Analogue Output or Digital Output FTA T8850 provides termination 

for a maximum of 40 output field loops. The 40 channels are arranged in five groups each 

comprising eight identical channels.  

Indication of the presence of the field power supply is provided by a green LED (one for each 

power group). 

The signal to the field device is routed through the FTA from the output module. 

The cable linking the 40 channels on the output module to the FTA is terminated at the 96

way socket JDH2. SmartSlot (Version 1) signals from the module are also connected to JDH1. 

The dc field power supplies can be connected to the FTA via a 10-way terminal block P1. The 

output signals to the field (40-off) are connected by 2-wire arrangements terminated on the 

dual height terminal blocks TB2.

Installation 

Trusted 40 Channel Analogue Output or Digital Output FTA T8850 is designed to be 

mounted on either of the TS32 or TS35 DIN rails in the horizontal or vertical positions as 

required.

Trusted 40 Channel Analogue or Digital Output FTA 

Product Overview 

The Trusted® 40 Channel Analogue Output or Digital Output Field Termination Assembly (FTA) is 

designed to act as the main interface between the Trusted Triple Modular Redundant (TMR) 24 Vdc 

Digital Output Module T8451, Trusted Triple Modular Redundant (TMR) 24/48 Vdc Digital Output 

Module T84611 or Trusted TMR Analogue Output Module T8480 and the field device. 

Features: 

• 40 output channels per FTA. 

• Industry standard field device connections (2-wire). 

• Standard DIN rail compatibility. 

• Screw clamp terminals on both field and power. 

• Simple installation and connection. 

• 24 Vdc operation. 

• SmartSlot connection for ‘one to many’ hot replacement of output modules. 

• Five isolated groups of eight channels. 

• On-board LED indication of field power supply. 

• Field terminal wire size allowance 12 AWG to 28 AWG. 

Trusted TMR Expander Interface Adapter Unit 

Product Overview 

This document provides general information for the Trusted® Triple Modular Redundant (TMR) 

Expander Interface Adapter Unit T8312. Two versions of the Unit are available; one providing 

inter-connection between the Trusted Expander Interface Modules in the Controller Chassis and 

four Expander Chassis (T8312-4), and the other providing inter-connection to seven Expander 

Chassis (T8312-7). 

Features: 

• Allows easy inter-connection of Controller and Expander Chassis. 

• Unit is fully shielded for Electro-Magnetic Compatibility (EMC). 

• Version available for smaller Trusted Systems – up to four Expander Chassis. 

• Locking connectors for increased reliability.

Description 

The Trusted Expander Interface Adapter Unit T8312 comprises four, or seven 12-pin ODU 

connectors (dependent on type of Unit), a printed circuit board (PCB), a 96-way C type 

connector which plugs into a double 96-way connector assembly designed to be connected 

to the Trusted Expander Interface Modules resident in the Controller Chassis. The Unit is 

contained within a metal enclosure and is designed to be clipped onto the Controller Chassis 

rear connectors. A release button is provided to enable the Unit to be disconnected. 

The TMR 24V dc analog input module, shown in Figure 6-10, interfaces to 

40 sourcing field input devices. The module acts as a current sink for the 

devices.  

The module can detect open and shorted field cables using the built-in line

monitoring feature. Line monitoring functions are independently configured 

for each input channel. 

The module provides on-board sequence of events (SOE) reporting with a 

resolution of 1ms. A change of state triggers an SOE entry. States are 

determined by voltage thresholds that can be configured on a per channel 

basis.  

The input status LED mode is dependent upon the voltage level of the field 

I/O signal. Each field input voltage is measured and compared to six 

threshold levels (four configurable and two fixed) which produce seven 

threshold bands, as described in Section 8. Each threshold band can be 

defined to have a particular indicator mode: off, solid or flashing green, or 

solid or flashing red.