Black Box IC235A User manual

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INFORMATION
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DECEMBER 1999
IC235A
IC235AE
IC236A
IC236AE
RS-232↔MIL Std. Interface Converter
RS232↔MIL STD
POWER
TD RTS ST RT CTS RD

3
TRADEMARKS
TRADEMARKS USED IN THIS MANUAL
UL is a registered trademark of Underwriters Laboratories Incorporated.
Product names mentioned in this manual may be trademarks or registered
trademarks of their respective companies and are hereby acknowledged.

4
Chapter Page
1. Specifications ................................................................................................5
2. Introduction..................................................................................................7
2.1 Description..............................................................................................7
2.2 Applications ............................................................................................7
3. Installation ..................................................................................................10
3.1 Installing the Converter ......................................................................11
3.2 Setting the RS-232 Interface ................................................................12
3.3 Setting the Interface Converter for MIL 188/114 Mode ..................13
3.4 Setting the Interface Converter for MIL 188C Mode ........................14
3.5 Tying Together Frame and Signal Ground ........................................14
4. Status Indicators..........................................................................................15
5. Troubleshooting ........................................................................................17
Appendix A: Signal Flow Diagrams..................................................................20
Appendix B: The Interfaces ............................................................................28
Contents

5
CHAPTER 1: Specifications
Connectors — RS-232 Interface: DB25 female;
MIL Std. Interface: DB25 female (pinned
in accordance with EIA standard RS-530,
which specifies a high-speed interface)
Data Rates— Speed transparent to a maximum of
64 Kbps
Interface — EIA Interface: RS-232C/V.24; used for async
or sync, depending on the model. Cannot
be configured by the user.
MIL Std. Interface: RS-530; the same for
both models. Cannot be configured by the
user.
Electrical Settings: MIL 188/114 or
MIL 188C. Configured by the user. Either
sync or async, depending on the model.
Operation — IC235A: Async; IC236A: Sync
Leads Supported — MIL 188C: Async: 1, 2, 3, 4, 5, 6, 7, 8, 20, 24;
Sync: 1, 2, 3, 4, 5, 6, 7, 8, 15, 17, 20, 24;
MIL 188/114: Async: 1, 2, 3, 4, 5, 6, 7, 8, 10,
11, 13, 14, 16, 19, 20, 22, 23, 24; Sync: 1, 2, 3,
4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17,
19, 20, 22, 23, 24
Operating Temperature — 32 to 104°F (0 to 40°C)
Storage Temperature — 32 to 158°F (0 to 70°C)
Max. Altitude Tolerance — 15,000 feet (4572 m)
1. Specifications

6
Humidity Tolerance — Up to 90%, noncondensing
Power Supply — Regulated wall-mount transformer, UL®
and CSA approved, +5 VDC, 12 VDC;
PS055: Primary: 104 to 125 VAC, 60 Hz,
10%; Secondary: +5 VDC @ 860 mA, 22 watts,
±12 VDC @ 300 mA; PS055E: Primary: 230
VAC, 50 Hz; Secondary: +5 VDC, 5 amps
Size — 2.5"H x 8"W x 6.25"D (6.4 x 20.3 x 16 cm)
Weight — With power supply, 3 lb. (1.4 kg)
A DB37 female connector may be specified as an option for the MIL 188
interface. Contact Black Box in order to request this option.

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CHAPTER 2: Introduction
2.1 Description
The RS-232↔MIL Standard Interface Converter is a bi-directional converter
enabling you to connect RS-232 equipment to MIL 188/114 or 188C
equipment. The Converter is available in synchronous and asynchronous
models. The MIL Standard interface is pinned to the RS-530 mechanical
specs. The user is given the choice of configuring for balanced or unbalanced
operation. The converter is powered by a 115-VAC wall-mounted power
supply included with the unit. (A 230-VAC version is available upon request.)
2.2 Applications
Figures 2-1 through 2-4 are included as examples of typical applications for
this interface converter. Use them to help you decide how to best use this
product.
Figure 2-1. Standard Applications.
RS232 Host
RS232 MIL 188 MIL Standard
(DCE) (DTE) Modem
(DCE)
(DTE)
Computer
Terminal
(DTE)
RS232 RS232 MIL 188
(DTE) (DCE)
Modem
(DCE)
MIL Standard
2. Introduction

8
Figure 2-2. MIL 188 Async Applications Showing Pinning.
Note: Grounding is optional for the MIL 188/114 interface.
Figure 2-3. MIL 188/114 (Balanced)
Sync Application Showing Pinning.
(DTE)
RS-232
Synchronous
Terminal
RS-232 MIL 188/114
(DCE) (DTE) (DCE)
MIL 188/114
Modem
2
3
7
15
17
2
3
7
15
17
2
14
3
16
15
12
17
9
TDA
TDB
RDA
RDB
TCA
TCB
RCA
RCB
RS-232
RS-232 MIL 188/114
Any MIL 188/114
DCE Device
(DCE) (DTE)
PC
(DTE)
2
14
3
16
RDA(-)
RDB(+)
TDA(-)
TDB(+)
Ground
Optional
for Balanced
2-2
3-3
7-7
4
5
6
8
20
Cable Pinout
RS-232
RS-232 MIL 188C
Any MIL 188C
DCE Device
(DCE) (DTE)
PC
(DTE)
2
3
7
3 (RD)
2 (TD)
7 (SG)
2-2
3-3
7-7
4
5
6
8
20
Cable Pinout

9
CHAPTER 2: Introduction
Figure 2-4. MIL 188C (Unbalanced) Sync Application Showing Pinning.
RS-232 MIL 188C
MIL 188C
Synchronous
Multiplexor
(DCE) (DTE)
(DTE)
RS-232
Synchronous
Terminal
(DCE)
2
3
7
15
17
2
3
7
15
17
2
3
7
15
17
(TD) 2
(RD) 3
(SG) 7
(TC) 15
(RC) 17

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Figure 3-1 shows the location of components on the interface converter’s
circuit board. These components are described later in this chapter.
Figure 3-1. The Circuit Board.
J1A J2J1B
J3
GND
POWER MIL 188 RS232
TD RTS ST POWER RT CTS RD
JP1
W1
W2C W3C W4C W5C W6C
W2 W3 W4 W5 W6
DCE DTE DCE DTE DCE DTE DCE DTE DTE DCE
MIL 188/114 MIL 188C
DTE DCE DTE DCE DTE DCE DTE DCE DTE DCE
2 3 4 5 6 8
15 17 20 24
DCE
DTE
DCE
DTE
DCE
DTE
DCE
DTE
DCE
DTE
DCE
DTE
DCE
DTE
DCE
DTE
DCE
DTE
DCE
DTE
3. Installation

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CHAPTER 3: Installation
3.1 Installing the Converter
Before attempting to install the interface, read these steps.
1. Make sure the package came with everything that should be included.
You should have received the RS-232↔MIL Standard Interface
Converter, this manual, and the wall-mounted power supply (either
115 or 230 VAC).
2. Open the interface converter case by removing the two screws
on the bottom of the unit with a Phillips-head screwdriver.
3. Set the jumpers and DIP shunts for your application according to the
directions found in Sections 3.2 through 3.5. See Figure 3-1 for the
location of these components.
4. Replace the top of the interface converter and secure it in place with the
two screws.
5. Attach the cable from the MIL Standard device to the MIL 188 connector
on the rear of the unit.
6. Attach the cable from the RS-232 device to the RS-232 connector on the
rear of the unit.
7. Plug the 5-pin adapter of the wall-mounted power supply into the power
connector on the rear of the unit. Then plug the three-prong connector
into a wall outlet. The unit is now ready for use.
Jumpers W6 and W6C need to be set only for synchronous operation of the
converter. They play no part in asynchronous communications.
Positions for jumpers and shunts are labeled “DCE” and “DTE” on the PC
board.
For proper operation of the interface converter, the status of the RS-232 and
MIL 188 sides of the converter must be opposite each other. For example, if
the RS-232 side is set to DCE, the MIL 188 side must be set to DTE.