M-TI 91795 User manual

MTI DOC 91795-A1
MTI Embedded Controller
Part Number 91795
Simple, Reliable
and Cost Effective
Technology
I N S T A L L A T I O N

MTI DOC 91795-A1
TABLE OF CONTENTS
DESCRIPTION...…………………………………………………………………….... 1
PRODUCT OVERVIEW..………………………………………………………………. 3
CONNECTING TO THE NETWORK………………………..…………………… 4
CONNECTING POWER......……………………………………………………. 4
BEFORE YOU BEGIN………….………………………………………………………. 5
PARTS LIST…………………………………………………………………... 5
PRODUCT SERIAL NUMBER LABEL PLACEMENT….…………………………... 5
INSTALLATION………………………………………………………………………... 6
START UP………………….………………………………………………… 6
SPECIFICATIONS...………………………………………………………………….... 7

MTI DOC 91795-A1
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DESCRIPTION
The 91795 Embedded Controller builds on MTI’s proven PLC2000 series controller platform.
The Embedded Controller was designed with large, distributed systems in mind while
maintaining MTI’s cost effectiveness for systems of all sizes. All communications are performed
over the Ethernet port which allows the 91795 to be located anywhere on the control network.
This provides great flexibility in system design and implementation. The Embedded Controller
supports up to sixty-four processors. Each processor can control up to sixty-four I/O points
which means that the 91795 can support up to 4,096 I/O points. The 91795 is configured using
MTI PLC Software or the web browser interface.
The controller can perform 100+ predefined functions as single line instructions. The controller
allows for script language programming for special functions. The operating system is stored in
flash memory for easy programming. The Embedded Controller communicates with the MTI
91620 data loop converter to provide control of all MTI data loop devices. The 91795 also
communicates with the MTI 81750 Decoder Board which provides Ethernet communications
directly from the 91795 to the I/O termination boards. All control communications have the
option of full encryption through the use of Secure Socket Layer (SSL) protocol. This protocol
provides a standards-based method of encryption with low overhead and latency. All networked
components of the MTI control system can be configured to utilize this protocol for
communications.

MTI DOC 91795-A1
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ELO
DATACONVERTER
+12V
COM
D1
D2
CLK
CHAN1
+12V
COM
D1
D2
CLK
CHAN4
CHAN5
CLK
D2
D1
COM
+12V
CHAN8
CLK
D2
D1
COM
+12V
+12V COM
HGND
NETWORK
+12V
COM
D1
D2
CLK
CHAN3
CLK
D2
D1
COM
+12V
CHAN7
+12V
COM
D1
D2
CLK
CHAN2
CLK
D2
D1
COM
+12V
CHAN6
MTIPN
91620
COM PWR
HGND
LED
A-X5
A-X6 A-X7
A-X6
On/Off
Day/Ngt
AUD1
AUD1 AUD2
AUD2
SHLD
SHLD CALL
COM
7
MTI PN
51129B
D2
CLK
COM
D1
+12
6 5 4 23 1 0 7 6 5 4 3 2 1 0
MTIPART NO. 51222
D1
D2
C
COM
+12
+24
COM
COM
24COM
MTIPN 51155A
EMBEDDED CONTROLLER
NETWORK
MTIPN 9169 5-1
V
I
N
C
O
M
LED
ON PORT
COM
Figure 1: Sample MTI control system using a 91795 Embedded Controller. (system using 81750
decoder boards not shown)

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PRODUCT OVERVIEW
Figure 2: 91795 Embedded Controller Connections - Top View
Figure 3: 91795 Embedded Controller –Front View

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CONNECTING TO THE NETWORK
The 91795 Embedded Controller supports a 100 Mbps network connection.
1. Connect a Cat5e (or better) unshielded twisted pair (UTP) cable and connector to the RJ-
45 connector on the 91795.
2. Connect the other end of the UTP cable to an available port on a 10/100 (minimum)
compatible network switch.
CONNECTING POWER
The 91795 Embedded Controller requires a connection to a 12V DC power supply which is
capable of supplying 2 A of current. The 91795 should be connected to the 12V DC power
supply using a minimum of 14 gauge copper conductors. MTI recommends that the 12V DC
power supply be connected to an uninterruptible power supply (UPS).
To connect power:
1. Connect two power conductors to pin 1 and 2 of the power connector.
2. Connect the other end of the two power conductors to the appropriate power source.

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BEFORE YOU BEGIN
You will also need the following:
MTI-approved Firefly technician
Power Source (12V DC). For UL294 listed applications, the power supply must be
located immediately adjacent to the panel enclosure.
Hand tools and two screws to mount the 91795 in the cabinet/rack
Access to a 10/100 (minimum) network
PARTS LIST
Qty Description
1MTI 91795 Embedded Controller
191795 Installation Manual (MTI DOC 91795-A1)
1Product Serial Number Label (attached to the back of the unit)
PRODUCT SERIAL NUMBER LABEL PLACEMENT
The product serial number label helps identify your 91795 Embedded Controller in the event that
your 91795 requires service. The serial number label is located on the back of the 91795.

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INSTALLATION
The 91795 Embedded Controller can be mounted to any back plate in a cabinet or rack. In
certain job specific cases, MTI will ship the 91795 already mounted to the back plate. This is job
specific and must be specified at the time the order is placed with MTI.
To install the 91795 to a back plate:
1. Position the 91795 on the back plate at the desired location. Make sure that the 91795 is
positioned so that the lettering on the unit are legible and the tabs are to the left and right.
2. Mark the holes in the mounting tabs using a permanent marker.
3. Pre-drill the holes with an appropriately sized drill bit.
4. Mount the 91795 to the back plate using two screws.
The 91795 should be installed in accordance with the National Electric Code, ANSI/NFPA 70
and the local authority having jurisdiction.
STARTUP
To start the 91795 Embedded Controller:
1. Make all required connections as discussed in the Product Overview section.
2. Turn on the 12V DC power supply which is supplying power to the 91795.
3. Check the indicators:
a. The red “Run” LED on the front of the 91795 should blink on and off once a
second.
b. The LEDs on the network jack should indicate network connection status and
activity.
4. If this is a new installation, refer to the MTI PLC Software.NET Operator Manual for
instructions on how to configure the 91795.

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SPECIFICATIONS
SYSTEM
Processor Speed 1 GHz
RAM 128 MB
Flash 128 MB
NETWORK
Interface 10/100 Ethernet RJ-45 port (100Base-T)
LED INDICATIONS
Run Mode Red (blinks on and off once a second)
Network Activity Green
Network Status Amber
POWER
Power Input 12V DC (+/- 5%)
Power Supply External
Power Consumption 2A @ 12VDC (maximum)
Cable Type 14 gauge copper pair (minimum)
ENVIRONMENTAL
Operating Temperature 32⁰to 120⁰F
Storage Temperature -40⁰to 149⁰F
Operating Humidity 20% to 85%, noncondensing
Maximum Humidity Gradient 10% per hour
Operating Altitude -50 to 10,000 ft (not verified by UL)
PHYSICAL
Construction UL94V-O Flame Retardant ABS
Finish Black
Dimensions 5.625”Lx3.25”Wx1.375”D
Mounting Back Plate (2 screws)
Unit Weight 0.5 lb