Raymar MIU202T User Manual

Installation, Operation & Diagnostics

MIU202T

Industrial Grade, Bell 202T

Standalone Modem

0049-0101-XXX MIU202T – USER GUIDE 06/29/2018
Rev. B

Raymar Information Technology, Inc.

7325 Roseville Road

Sacramento, CA 95842

800-695-1951

Fax: [phone]

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Rev. B Page i

The products and programs described in this User’s Guide are licensed products
of Raymar-Telenetics. This User’s Guide contains proprietary information
protected by copyright, and this User’s Guide and all accompanying hardware
and documentation are copyrighted.

Raymar-Telenetics does not warrant that the hardware will work properly in all
environments and applications, and makes no warranty and representation,
either implied or expressed, with respect to the quality, performance,
merchantability, or fitness for a particular purpose.

Information in this User’s Guide is subject to change without notice and does not
represent a commitment on the part of Raymar-Telenetics. Raymar-Telenetics
assumes no responsibility for any inaccuracies that may be contained in this
User’s Guide.

Raymar-Telenetics makes no commitment to update or keep current the
information in this User’s Guide, and reserves the right to make changes to this
User’s Guide and/or product without notice.

No part of this manual may be reproduced or transmitted in any form or by any
means, electronic or mechanical, including photocopying, recording, or
information storage and retrieval systems, for any purpose other than the
purchaser's personal use, without the express written permission of Raymar­Telenetics.

 Copyright 2010 Raymar Information Technology, Inc.
7325 Roseville Road
Sacramento, California 95842
Tel: [phone] Direct: [phone]
Fax: [phone]
Web site: www.raymarinc.com

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TABLE of CONTENTS

1. STANDARDS 1

2. PRODUCT OVERVIEW 1

3. GENERAL PRODUCT SPECIFICATIONS 2

4. MODEM SPECIFICATIONS 2

5. ANALOG LINE SPECIFICATIONS 4

6. ANALOG MICROWAVE INTERFACE 5

7. POWER CONNECTIONS 6

8. SERIAL DATA PORT PIN-OUTS 7

9. DIP SWITCH FUNCTIONS 8

10. MODEM CONFIGURATION 10

11. LED INDICATOR 11

12. OUTLINE DRAWING & MOUNTING 12

13. DIAGNOSTICS 12

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1. STANDARDS

Meets FCC Rules Part J, Subpart 15, Class A for radiated emissions.

2. PRODUCT OVERVIEW

The MIU202T is an industrial grade Bell 202T modem for connection to unconditioned and

conditioned, voice grade, type 3002 two or four-wire leased lines and metallic lines (e.g.; pilot
wires). It can be powered from a wide range of AC and DC power supplies, it is internally surge
protected on both the power and analog lines, and it will operate in temperatures from -40 to
+85ºC.

Internally, the MIU202T consists of a baseboard and a communication module. The baseboard

includes the power supply regulation and surge protection. The communication module is a
Raymar-Telenetics Pony ExpressTM PE202T Modem Module.

The MIU202T is packaged specifically for the harsh environments found in utility substations

and industrial facilities. Though functionally similar to commercial modems, the MIU202T
includes special features that make it particularly well suited for utility and industrial
applications:

Environment: The MIU202T has been designed specifically for use in harsh

environments. In addition to an extended temperature range (-40 to
+85ºC), the MIU202T includes surge, shock, vibration, and safety features
superior to those of conventional commercial modems.

Power Supply: The MIU202T can be powered from a broad range of AC and DC power

supplies, such as an auxiliary supply (e.g.; 12 VDC) from another piece of
equipment, 125 VDC from a station battery or a standard 120VAC.

Industrial: The MIU is packaged in a rugged, compact, non-metallic (ABS) enclosure.

Designed for unmanned locations, the MIUs do not include the array of
pushbuttons and LEDs normally associated with consumer-type modems.
Configuration is by dip switches. Standard industrial connectors for data,
analog and power interfaces allow reliable interconnection to other
industrial components.

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3. GENERAL PRODUCT SPECIFICATIONS

Dimensions: 5.3 x 4.0 x 1.375 inches
Weight: 1 lb.

Voltage Supply:
Standard Model: 40 to 270 VDC
40 to 270 VAC, 50/60 Hz
LV Model: 9 to 36 VDC

Current Requirements:

12VDC 24VDC 125VDC 120VAC 220VAC
65mA 27mA 7.5mA 6.5mA 5.5mA

Surge Protection:

Power Supply: 8kVrms
Analog Line: 3.75kVAC
Digital Line: ESD ± 10kV

Operating Temperature: -40 to +85ºC

Operating Humidity: 0 to 90% (non-condensing)

Storage Temperature: -55 to 100ºC

4. MODEM SPECIFICATIONS

Modulation: Bell202T

Modulation Type: FSK

Synch/Async: Asynchronous Only

Data Rate: 0 – 1200bps

Transmit Frequency: Mark: 1200Hz
Space: 2200Hz

Error Correction: None

Data Compression: None

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Data Modulation Connectivity:

Using 16ms Polling Test

99.999% or better at -37dBm

99.5% or better at -40dBm
95% or better at -43dBm

Serial Format and Flow Control:
Asynchronous and RTS/CTS flow control

Analog Interface

Tx Output Level: -0dBm or -10dBm *
Rx Sensitivity: -43dBm or -33dBm *

-43dBm for constant carrier

-40dBm for polling carrier

Line Termination: Dip Switch Selectable *
Line Impedance: 600 ohms balanced
2 or 4 Wire Configuration: Dip Switch Selectable *

Other Features

Receiver Equalization: Compromise Equalization

Self-Test Diagnostics: None

Local Analog Loopback: See Section 13

Local Digital Loopback: See Section 13

Remote Analog Loopback: See Section 13

Remote Digital Loopback: See Section 13

Anti-Streaming: OFF or 45 Seconds (± 5 sec) *

RTS/CTS delay: 1ms, 12ms, 35ms or 50ms (± 5%) *
Note: Soft Carrier will affect RTS/CTS delay time
(see Dip Switch Settings – Section 8)

Constant Carrier: Switch Selectable ON or OFF

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Soft Carrier Turn Off 20ms of 900Hz after RTS is turned OFF

Carrier Turn ON/OFF 8ms ± 0.5ms

* Dip Switch Selectable – See Section 9

5. ANALOG LINE SPECIFICATIONS

The MIU202T contains analog circuitry for connection to the public conditioned or
unconditioned, Bell type 3002, 2 or 4-wire, full duplex voice grade leased lines or metallic lines
(e.g.; pilot wires). The MIU202T will also interface to Power Line Carrier or Microwave radio
voice channel networks.

The MIU202T has an RJ-11 terminated connector. The following lists the MIU202T analog
interfaces.

Analog Line Type:

Conditioned or unconditioned, Bell type 3002, 2 or 4-wire, full duplex voice grade or metallic
lines or better.

Analog Line Specifications:

Bandwidth 300 Hz to 3400 Hz (±3dB)
Impedance 600 / 900 ohms, balanced
Frequency Response 400 to 3000Hz (±2dB)
Receiver Input Level -16dBm max.
Output Level +7 dBm
Noise Signal Level -48 dBmO

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6. ANALOG MICROWAVE INTERFACE

The MIU202T is designed to interface to a Microwave radio voice channel network with the
following specifications:

Phase Jitter (10 to 300Hz) 1 degree peak-to-peak, max.

Frequency Response: 300 – 3400Hz -3, +0.7 dB
400 – 3000Hz -1, +0.7 dB
600 – 2400Hz ± 0.7 dB

Frequency Stability: With Synchronization 0.1 Hz
Without Synchronization 0.5 Hz/month

Level Stability (w/o regulation): ± 0.5 dB (6 months)

Harmonic Distortion: 1% max., 0.3% typical
(1 KHz, 0 dBmO test tone)

Absolute Delay: Option – 001: 1500 µsec, maximum
Option – 002: 1900 µsec, maximum

Group Delay (option – 001): 600 – 3200 Hz 1200 µsec, maximum
800 – 2800 Hz 550 µsec, maximum
1000 – 2600 Hz with 180 µsec, maximum

Linearity: 0.3 dB +3.5 dBmO

Limiting: +7.5 dBmO, max (+6.5 dBmO typical) for +20 dBmO input

Crosstalk (intelligible)(1 KHz test tone at 0 dBmO):
Inter-channel 65 dBmO maximum, 80 dBmO typical
Intra-channel 70 dBmO maximum

Crosstalk (unintelligible):
Adjacent channel 28 dBrnc0 maximum (24 455B weighted noise at 0 dBmO
dBrnc0 typical).
Intra-channel 28 dBrnc0, maximum (18 dBrnc0, typical)
(1KHz test tone at 0 dBmO)

Out of Band Signaling: Frequency 3825 Hz
Level -20 dBmO
Pulse distortion ±3 dB, level var. 3% max.
Signaling leak -60 dBmO, maximum

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7. POWER CONNECTIONS

Important Notes:

1. Wire colors shown are for optional Raymar-Telenetics cable, if ordered.

2. Customer supplies cable must be suitable for site environmental conditions.

3. Surge protection only guaranteed if ground wire >18 AWG

4. Solidly earthed ground connection required to guarantee surge protection.

5. Screw terminals accept 28 to 16 AWG.

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8. SERIAL DATA PORT PIN-OUTS

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9. DIP SWITCH FUNCTIONS

IMPORTANT NOTE: Invert modem to view dip switches as shown above.

Table 1

Switch Function ON OFF

Switch 1 Transmit Analog (TxA) Signal Level 0 dBm -10 dBm
Switch 2 Anti-Streaming 45 secs OFF
Switch 3 Received Analog (RxA) Signal Level -33 dBm -43 dBm
Switch 4 RTS/CTS Delay See Table 2
Switch 5 RTS/CTS Delay See Table 2
Switch 6 Switched/Constant Carrier Constant

Carrier

Switched
Carrier
(Follows RTS

State)
Switch 7 2 or 4- Wire Selection 2-Wire 4-Wire
Switch 8 Line Termination 600 ohms None
Switch 9 Soft Carrier (900 Hz) Turn Off ON OFF
Switch 10 Spare

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Switch

Switch

Table 2: RTS/CTS Delay Time

2

Wire 4 Wire

Switched

Carrier

Constant

Carrier

4

5

Switch 9

Soft

Carrier

NO YES YES YES ON ON OFF 50 ms
YES NO YES NO ON ON ON 50 ms
NO YES YES NO ON ON ON 50 ms
YES NO YES NO ON ON OFF 50 ms

NO YES YES YES OFF ON OFF 35 ms
NO YES YES NO OFF ON ON 35 ms
YES NO YES NO OFF ON ON 35 ms
YES NO YES NO OFF ON OFF 35 ms

NO YES YES YES ON OFF OFF 12 ms
NO YES YES NO ON OFF ON 35 ms
YES NO YES NO ON OFF ON 12 ms
YES NO YES NO ON OFF OFF 12 ms

NO YES NO YES OFF OFF OFF 1 ms
NO YES YES NO OFF OFF OFF 12 ms
NO YES YES NO OFF OFF ON 1 ms
YES NO YES NO OFF OFF OFF 1 ms
YES NO YES NO OFF OFF ON 1 ms

RTS/CTS

Delay

Time

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Slave Rx Term.

Slave Rx Term.

10. MODEM CONFIGURATION

The following table provides the Dip Switch settings required for most modem application
configurations:

Dip Switch Setting

1 2 3 4 5 6 7 8 9

4-Wire

ON ON ON ON

Point-to-Point
4-Wire

ON ON ON ON

Multi-Point
Master
4-Wire

ON ON ON ON ON

Multi-Point

OFF
4-Wire

ON ON ON ON ON ON

Multi-Point

ON
2-Wire

ON ON ON ON ON ON ON

Point-to-Point
2-Wire

ON ON ON ON ON ON ON

Multi-Point
Master
Line Term. ON
2-Wire

ON ON ON ON ON ON ON

Multi-Point
Slave
Line Term. ON
2-Wire

ON ON ON ON ON ON

Multi-Point
Slave
Line Term.
OFF

For clarity, a blank space = OFF

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11. LED INDICATOR

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12. OUTLINE DRAWING & MOUNTING

Note: Din Rail Mounting available – please call a Raymar-Telenetics sales associate for details.

13. DIAGNOSTICS

The following pages provide hardware techniques for diagnosing communication problems and
thereby isolating the problem at the local modem, the remote modem or the interconnecting line.

(a) LOCAL ANALOG LOOPBACK (Figure 2)

Requires a loop back cable with a built-in circuit for line loss to simulate a typical leased
line condition. (See Figure 3)

Connect the loop back cable to the RJ11 connector on the modem under test.

Set Dip Switches as follows:
Switch 7 = OFF 4-Wire
Switch 9 = ON Soft Carrier Turn Off Enabled
Switch 1 = ON Transmit (TxA) Signal Level = 0 dBm

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Switch 3 = ON Receive (RxA) Signal Level = -33 dBm
Switch 6 = OFF Switched Carrier
Switch 4 & 5 = ON RTS/CTS Delay = 50 ms

Test 1: RTS/CTS Analog Control

Set RTS “ON” and check that CD (Carrier Detect) turns “ON”.

Turn RTS “OFF” and ensure that CD turns “OFF”

With RTS “ON”, run a test message at TxD and verify that the same message is
received at RxD with no data errors.

Test 2: Transmit Signal Power & Receive Levels

Set Dip Switch 1 OFF (TxA = -10 dBm)

CD will be OFF

Change Dip Switch 1 to ON (TxA = 0 dBm)

CD should now be ON

Test 3: Received Signal Level

Set Dip Switch 1 OFF (TxA = -10 dBm) and Dip Switch 3 OFF (RxA = -43
dBm)

CD will be ON

Run a test message at TxD and verify that the same message is received at RxD

with no data errors.

Test 4:

Repeat Test 3 for various RTS/CTS delay times and with soft carrier ON and
OFF.

(b) LOCAL DIGITAL LOOPBACK – 4/Wire Network (Figure 4)

On the modem under test, connect TxD to RxD

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Switch 1 = ON (TxA = 0 dBm)
Switch 3 = ON (RxA = -33 dBm)
Switch 4 = OFF (RTS/CTS = 35 ms)
Switch 5 = ON (RTS/CTS = 35 ms)
Switch 6 = ON (Constant Carrier mode)
Switch 7 = OFF (4-Wire)
Switch 8 = ON (Line Termination = 600 ohms)
Switch 9 = ON (Soft Carrier = ON)

Transmit a test message from a remote modem and confirm that the same message is
received back at RxD on the remote modem with no data errors.

(c) REMOTE DIGITAL LOOPBACK – 4/Wire Network (Figure 5)

Configure both the local and remote modems as follows:

Switch 1 = ON (TxA = 0dBm)
Switch 3 = ON (RxA = -33dBm)
Switch 4 = OFF (RTS/CTS = 35 ms)
Switch 5 = ON (RTS/CTS = 35 ms)
Switch 6 = ON (Constant Carrier mode)
Switch 7 = OFF (4-wire)
Switch 8 = ON (Line Termination = 600 ohms)
Switch 9 = ON (Soft Carrier Turn Off = ON)

Connect TxD to RxD at the remote modem.

Transmit a test message from the local modem and confirm that the same message is
received back at RxD on the local modem with no data errors.

(d) LINE DIAGNOSTICS

(i) Typical modem configurations for 4-wire Point-to-Point system:

Switch 1 = ON (TxA = 0dBm)
Switch 3 = ON (RxA = -33dBm)
Switch 4 = OFF (RTS/CTS = 1 ms)
Switch 5 = OFF (RTS/CTS = 1 ms)
Switch 6 = ON (Constant Carrier mode)
Switch 7 = OFF (4-Wire)
Switch 8 = ON (Line Termination = 600 ohms)
Switch 9 = OFF (Soft Carrier = OFF)

(ii) Typical modem configuration for 4-wire Multi-Point system:

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Switch 1 = ON (TxA = 0dBm)
Switch 3 = ON (RxA = -33dBm)
Switch 4 = OFF (RTS/CTS = 1 ms)
Switch 5 = OFF (RTS/CTS = 1 ms)
Switch 6 = ON (Constant Carrier mode)
Switch 7 = OFF (4-Wire)
Switch 8 = ON (Line Termination = 600 ohms)
Switch 9 = OFF (Soft Carrier = OFF)

Adjustments:

In a network with high line loss (greater than 16dB) change Switch 3 (RxA) to OFF

(-43dBm).

If there are conditions that can cause cross-talk (TxA leaking into RxA path) set Switch 1

(TxA) to OFF (-10dBm).

Note that noise level should be -50dBm or lower for most FSK operation (signal-to-noise

ratio of 15dB or higher).

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Raymar Information Technology, Inc.

Limited Warranty

One Year Limited Hardware Warranty

Raymar Information Technology, Inc., dba Raymar-Telenetics, warrants their products against defects in hardware, material and workmanship under normal
use for one (1) year from the date of purchase. Raymar will, at no charge, either repair the product (with new or reconditioned parts), or replace it (with a
new or reconditioned product). Repaired replacement products are warranted for either 90 days or the remainder of the original warranty period, whichever
is longer. This warranty extends to the original end-user only.

What This Warranty Does Not Cover

This warranty does not cover: (a) software; (b) installation or service of the product; (c) conditions resulting from consumer damage such as improper
maintenance or misuse, abuse, accident or alteration; (d) all plastic surfaces (including display screens) and all other exposed parts that are scratched or
damaged due to normal use; (e) operation of our products with equipment not supplied by Raymar (f) products which have had the serial number removed
or made illegible; or (g) products rented to others. This warranty applies only to hardware products manufactured by or for Raymar Information Technology,
Inc. and identified by the Raymar-Telenetics trademark, trade name or product identification logo affixed to them. Refer to the Service and Support section
of the User’s Guide for service after the warranty expires. No warranty is made as to coverage availability or grade of service provided by the carrier.

General Provisions

This warranty sets forth Raymar’s entire hardware responsibilities regarding this product. Repair, replacement or refund of the purchase price is at Raymar’s
discretion. THIS WARRANTY IS GIVEN IN LIEU OF ALL OTHER EXPRESS WARRANTIES, IMPLIED WARRANTIES, INCLUDING WITHOUT
LIMITATION IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, AND ARE LIMITED TO THE
DURATION OF THIS LIMITED WARRANTY. IN NO EVENT SHALL RAYMAR BE LIABLE FOR DAMAGES IN EXCESS OF THE PURCHASE
PRICE OF THE PRODUCT, FOR ANY LOSS OF USE, LOSS OF TIME, INCONVENIENCE, COMMERCIAL LOSS, LOST PROFITS OR SAVINGS,
OR OTHER INCIDENTAL, SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THIS RAYMAR
PRODUCT, TO THE FULL EXTENT SUCH MAY BE DISCLAIMED BY LAW. WITHOUT LIMITING THE FOREGOING, RAYMAR SHALL HAVE
NO LIABILITY FOR ANY DATA STORED IN OR USED WITH THE PRODUCT, INCLUDING THE RECOVERY COSTS OF SUCH DATA OR
PROGRAMS.

State Law Rights

SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LIMITATIONS
ON HOW LONG AN IMPLIED WARRANTY LASTS. THE ABOVE LIMITATIONS OR EXCLUSIONS MAY NOT APPLY TO YOU. This warranty
gives you specific legal rights, and you may also have other rights which vary from State to State.

Provincial Law Rights

SOME PROVINCIAL LAWS DO NOT ALLOW THE EXCLUSION OR LIMITATION OF IMPLIED WARRANTIES, THE
EXCLUSION OR LIMITATION OF WARRANTY COVERAGE IN CERTAIN SITUATIONS. SOME OF THE ABOVE
LIMITATIONS OR EXCLUSIONS CONTAINED IN THIS LIMITED WARRANTY MAY NOT APPLY TO YOU. This warranty gives you specific rights,
and you may have other rights which vary from province to province.

How to Use Raymar’s Limited Warranty Service

To take advantage of this warranty, you must do the following:

• If you are having trouble with your product, contact Raymar service using the appropriate number from the Service and Support
section of the User’s Guide. If it is determined that your product requires service, you will be issued a Return Materials
Authorization (RMA) form.

• Pack the defective product securely for shipping. Include only the units pre-approved by service on your RMA form.

• This warranty is void if the product is damaged in transit, you must insure your shipment.

• Ship the defective product, proof of date of purchase, and the RMA form to the address specified.

• Display your RMA number prominently on the outside of the shipping box. Customer is responsible for freight in, door to door. Raymar is responsible for
return shipping costs.

• To ensure prompt service, please write on the RMA form a brief description of the problem you are experiencing with the

product.

Raymar Information Technology, Inc.
7325 Roseville Road
Sacramento, CA 95842
Service Hotline [phone]

http://support.telenetics.com or e-mail to [e-mail]

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Raymar Information Technology, Inc.

Return Merchandise Authorization (RMA) Procedure

Before returning any Raymar-Telenetics product, an RMA number must be obtained.

The most convenient way to obtain an RMA number for a product purchased from Raymar-Telenetics is
to call 1-800-747-1522 ([phone]). When doing so, please have the following information
ready:

- Company name

- Full billing address, as well as the address for the location where the product should be returned

once repaired or replaced

- Telephone & Fax numbers

- Email address

- Product model number and serial number

For each item being returned, please include the product model number, the serial number, a description
of the problem being encountered, and the cause of the problem (if known).

Please note that prior to authorizing a return, a product support specialist may call to verify that the
product is properly installed or may ask you to perform tests to ensure that the product has actually
failed.

The product must be properly packed and returned to:

Raymar-Telenetics
7325 Roseville Road
Sacramento, CA 95842

The RMA number must be legibly displayed on the shipping carton. Raymar-Telenetics will not be
responsible for any product returned without an RMA number.

If the product is out of warranty, estimates for repair rates and any applicable shipping costs will be
communicated by a customer service representative. Currently, Raymar-Telenetics accepts purchase
orders or credit cards as payment methods.

Repairs currently require 5 – 10 business days and are returned via UPS Ground.

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