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Triguard SC300E
MDO16GNS
16-Channel Digital Output Module
INTRODUCTION
PURPOSE
The 48Vdc Digital Output Module MDO16GNS provides the output control interface between
the SC300E processing environment and up to 16 field items. All field outputs from the module
are galvanically isolated from the system.
Circuit triplication and voting procedures make the module single-fault tolerant and latent
testing ensures that the failure of a normally 'ON' (energised) or 'OFF' channel will be
recognised and reported to the system. Front panel indicators show the state of all channels,
the circuit 'on-line' status and the health of the module.
The module, which is compatible with 'dual slot hot repair', can be fitted in any of the ten I/O
slots in the SC300E chassis. 'Wrong slotting' is prevented by physical coding. The SC300E
main processor software identifies the module via a built-in hardware identifier.
Channel outputs leave the module via the DIN 41612 'rear plug-up' system on the chassis
backplane.
This document is intended to provide a general understanding of the function of the module
sufficient to enable basic maintenance operations to be effected in the field.
ASSOCIATED DOCUMENTATION
Reference No
008-5097
008-5143
Chassis User Manual
TDO16AIE 16-Channel Digital Output Termination Card
Introduced Power, 48Vdc User Manual
008-5141
48Vdc
(MDO16GNS)
Issue 2 October 2005
Title
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Related Manuals for ABB Triguard SC300E
Summary of Contents for ABB Triguard SC300E
- Page 1 Triguard SC300E MDO16GNS 16-Channel Digital Output Module 48Vdc (MDO16GNS) Issue 2 October 2005 INTRODUCTION PURPOSE The 48Vdc Digital Output Module MDO16GNS provides the output control interface between the SC300E processing environment and up to 16 field items. All field outputs from the module are galvanically isolated from the system.
- Page 2 Triguard SC300E MDO16GNS October 2005 – Issue 2...
- Page 3 Triguard SC300E MDO16GNS 16-Channel D/O Module 48Vdc Mechanical coding block (Upper) ConfigurationLinks Link3 Link 1 Connector J1 Common Interface (CI) Module Connector J2 Connector J3 Mechanical coding block (Lower) Figure 1-1 General view and front panel detail MDO16GNS October 2005 – Issue 2...
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Page 4: Environmental Specifications
Triguard SC300E SPECIFICATION Model MDO16GNS Channels Architecture One per point Indicators: Input Health, 3 x On Line Modules Output driver 48Vdc ±10% Voltage range Less than 3V Voltage drop Resistive load: 1A per channel Maximum drive Tungsten load: 0.125A per channel... -
Page 5: Transport And Handling
Triguard SC300E MDO16GNS 16-Channel D/O Module 48Vdc TRANSPORT AND HANDLING The MDO16GNS must be transported and stored in its original packing material which should be retained for this purpose. MDO16GNS October 2005 – Issue 2... -
Page 6: Technical Description
Triguard SC300E TECHNICAL DESCRIPTION PHYSICAL The MDO16GNS is a 9U high module with integral front panel and rear connectors. A daughterboard carries the common interface circuits. Figure 1-1 shows the general layout, including the location of the connectors and front panel details. -
Page 7: Module Connectors
Triguard SC300E MDO16GNS 16-Channel D/O Module 48Vdc Figure 2-2 Basic field load circuit Module connectors The system bus connector is J1 and the common interface is connected via J4 and J5 (not shown). All the digital outputs are routed through connector J2. In the external connection... -
Page 8: Theory Of Operation
Triguard SC300E Figure 2-3 Field output connector J2 pinouts Connector J3 pin 1c is connected to earth. All other pins on J3 are connected to field supply return. THEORY OF OPERATION The channel output command information from the main processor follows three identical paths through the MDO16GNS (see Figure 2-4 ), each path is controlled by its own microcontroller in the common interface. - Page 9 Triguard SC300E MDO16GNS 16-Channel D/O Module 48Vdc The data streams are then applied to the 16-bit output shift registers. The serial bits are clocked successively into the shift registers until the 16th bit has been received. The registers then latch the data and present it on the 16-bit busses (CHANA, CHANB and CHANC) to the output switches.
- Page 10 Triguard SC300E Figure 2-4. MDO16GNS – Block Diagram MDO16GNS October 2005 – Issue 2...
- Page 11 Triguard SC300E MDO16GNS 16-Channel D/O Module 48Vdc Common Interface The three discrete control circuits in the common interface (A, B, and C) are each responsible for the control of the corresponding one third of the I/O module circuits. Each control circuit comprises a microcontroller with a dedicated watchdog, data buffers and shared RAM.
- Page 12 Triguard SC300E Figure 2-5 Common interface - Block diagram MDO16GNS October 2005 – Issue 2...
- Page 13 Triguard SC300E MDO16GNS 16-Channel D/O Module 48Vdc SERVICING SCOPE Repair is by module replacement. Faulty modules are not repairable in the field. They should be replaced by new modules and returned for repair. CAUTION 1 Before fitting a new module ensure that the setting of the configuration links are the same as that on the old module.
- Page 14 Triguard SC300E When inserting a module ensure that it is aligned with the markings on the chassis rails and that it engages with the top and bottom guides. Improper insertion may cause damage to the module and/or chassis connectors. MDO16GNS October 2005 – Issue 2...
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Page 15: Preventive Maintenance
Triguard SC300E MDO16GNS 16-Channel D/O Module 48Vdc SINGLE-SLOT HOT REPAIR Operate the On/Off Line Request switch on the faulty module. The three On Line LEDs should all extinguish to indicate that the main processors have recognised the request and taken the module off-line. The last read data input from the module will be maintained until the new module is on-line. -
Page 16: Service & Support
Triguard SC300E SERVICE SUPPORT SPARES Spare parts and technical advice can be obtained from your local area offices. MDO16GNS October 2005 – Issue 2...
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