Rockwell Automation MHB44IND User Manual

Triguard SC300E

MHB44IND

Pulse Input and Analogue Output

Module

(MHB44IND)

Issue 2

INTRODUCTION

PURPOSE

The MHB44IND module (Figure 1-1) supports four pulsed voltage inputs for interfacing with field
detectors,

and supplies 0-22mA analogue outputs for process control.

October 2005

The module is a rack mounted, 9U high unit that provides the output control interface between
the

SC300E processing environment and the user field environment. It has four current loop

output

channels. All field inputs and outputs are galvanically isolated from the SC300E system

but

have a common supply connection.

Circuit triplication and voting procedures make the module single-fault tolerant and latent
testing

ensures that the failure of a channel will be recogised and reported to the SC300E
system.
the module. Sockets are provided on the front panel for monitoring the outputs.

The module is compatible with ‘dual slot hot repair’, and can be fitted in any of the ten I/O slots
in the SC300E chassis. ‘Wrong slotting’ is prevented by physical coding. The SC300E system
software

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 MHB44IND sufficient to
enable

Front panel indicators show the state of the circuit ‘on-line’ status and the health of

identifies the module via a built-in hardware identifier.

basic maintenance procedures to be effected in the field.

ASSOCIATED DOCUMENTATION

Reference No

008-5097

008-5201

Chassis User Manual

TPH44AIC 4-Channel Pulse Input and Analogue Output Termination Card
User Manual

008-5108

Title

2

MHB44IND

October

2005–Issue 2

Triguard

SC300E

MHB44IND

October

2005–

Issue

2

3

Triguard

SC300E MHB44IND Pulse Input and Analogue Output Module

Mechanical coding
block (Upper)

Links JP1 to JP4

Links LK1 to LK3

Connector J1

Common Interface

(CI) Module

Connector J2

Mechanical coding
block (Lower)

Figure 1-1 General view and front panel detail (safety covers removed)

Connector J3

4

MHB44IND

October

2005–Issue 2

Triguard

SC300E

SPECIFICATION

Model

MHB44IND

Channels

Architecture

Indicators

Test Point

Output range

Maximum resistive field load

Resolution

Accuracy @

Maximum input ripple voltage @24V field
supply

Maximum input ripple frequency

Stability (temperature coefficient)

Isolation

Field power

Voltage range

400ohm

@ 25°C

supply:

4 x pulse inputs

4 x analogue outputs

TMR

Health, 3 x On Line

4 x signal, 1 x common

0 to 22mA

6.25 µA steps

+

0.2% of full signal range

12V peak to peak

120Hz

15ppm/°C

1kV to system, commoned supply

+18Vdc to 30Vdc

Module power consumption

Pulse input waveform

Pulse input amplitude

Pulse input duty cycle

Pulse input width (minimum)

Pulse input impedance

Pulse input frequency resolution

Pulse input frequency accuracy

Overall size (mm)

Overall size (inches)

Weight

5.5W

Sine/Square/Pulse

100mV to 132V peak
(

NOTE:For sinewave inputs less than 10Hz

amplitude
1Hz)

10 to 90% up to 3.5kHz

14ms above 3.5kHz

10k ohm

16 bits

± 0.01% 1Hz to 35kHz

400

15.75H x 15.63L x 1.1W

1.7kg

minimum rises linearly to 200mV at

(9U)H x 397L x 28W

MHB44IND

October

2005–

Issue

2

5

Triguard

SC300E MHB44IND Pulse Input and Analogue Output Module

ENVIRONMENTAL SPECIF

The maximum ambient temperature measured at the hottest point within the Triguard system
shall

not be greater than 60 degrees centigrade.

Temperature operating:

Temperature storage:

Humidity

EMC/RFI

Vibration/Shock

Certification:

General Certification: Ref. SC300E TMR Product Guide (ref 008-5209)

Immunity

ICATIONS

+5°C to +60°C

-

25°C to +70°C

5% to 95% non-condensing at ambient <40°C

Tested and certified to IEC 1131-Part 2 1994

Tested and certified to IEC 1131-Part 2 1994

.

TRANSPORT AND HANDLING

The MHB44IND must be transported and stored in its original packing material, which should
be

retained for this purpose.

6

MHB44IND

October

2005–Issue 2

Triguard

SC300E

TECHNICAL DESCRIPTIO

N

PHYSICAL

The MHB44IND is a 9U high PCB with integral front panel and rear connectors. A plug-in
daughterboard carries the common interface circuits. Figure 1-1 shows the general layout,
including the location of the connectors, covers and configuration links.

The front panel provides the following: Three ‘On-Line’ indicators A ‘Health’ indicator

An On/Off line request switch

Eight test jacks as monitor points for the pulse input lines

Fo ur received

Four test jacks (plus common) for monitoring the o

Each monitor point gives 0 to 5.5Vdc negative with respect to common, determining the current
flowing
in series to prevent malfunction if the monitor point is short circuited -so
resistance meter is required for accurate readings.

-

pulse indicators (one per input pair)

in

the corresponding 0 to 22 mA output. Each monitor point has a 10k ohm resistance

NOTE

utput lines.

a high input

-

MECHANICAL CODING BLOCKS

All Input/Output modules carry two mechanical coding blocks equipped with pins which mate
with holes in corresponding blocks in the chassis
the

wrong slot. The pins in the module blocks are factory installed in a pattern determined by
the module and corresponding set screws are removed from the chassis coding blocks to
enable fitting. Unused holes are plugged with set screws. The chassis mechanical coding
block configuration for this module is shown in Figure 2-1

and prevent the module being inserted into

.

Figure 2-1 Chassis mechanical coding block configurations