SERIES IOS-445 I/O SERVER MODULE 32 CHANNEL ISOLATED SSR OUTPUT MODULE
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Acromag, Inc. Tel:248-295-0310 Fax:248-624-9234 Email:[email protected] http://www.acromag.com
Table 2.1: IOS-445 Field I/O Pin Connections (P2)
Pin Description
Number
Pin Description
Number
OD00
1
OD20
26
P
OD01
2
OD21
27
O
OD02
3
P
OD22
28
R
OD03
4
O
OD23
29
T
User Supply 0
5
R
User Com Out 2
30
2
OD04
6
T
OD24
31
OD05
7
OD25
32
OD06
8
0
OD26
33
P
OD07
9
OD27
34
O
User Com Out 0
10
User Supply 3
35
R
OD08
11
OD28
36
T
OD09
12
OD29
37
OD10
13
P
OD30
38
3
OD11
14
O
OD31
39
User Supply 1
15
R
User Com Out 3
40
OD12
16
T
Not Used
41
OD13
17
Not Used
42
OD14
18
1
Not Used
43
OD15
19
Not Used
44
User Com Out 1
20
Not Used
45
OD16
21
P
Not Used
46
OD17
22
O
Not Used
47
OD18
23
R
Not Used
48
OD19
24
T
Not Used
49
User Supply 2
25
2
Not Used
50
The output channels of this module are divided into four ports
of eight channels each. All channels within a port share a common
signal connection with each other. Isolation is provided between
the ports and the IOS logic which includes the remainder of the I/O
Server. In addition, bus isolation is provided between ports.
P2 pin assignments are arranged to be compatible with similar
Acromag models. This model is directly loopback compatible with
the Acromag Model IOS-440 32-Channel Digital Input Board.
Likewise, pin assignments are identical to those of Acromag Model
IOS-405 40-Channel Digital Output Boards for channels 0-31,
except for the user supply connections.
See IOS-440/IOS-445 LOOPBACK CONNECTIONS for
loopback connections to Acromag Model IOS-440 Input Modules.
Note that the outputs of this module are bipolar, and may be
connected in any direction with respect to the port common.
Further, do not confuse port commons with signal ground. For the
IOS-445, port common only infers that this lead is connected
common to the 8 outputs of the port (a separate common for each
port).
The port commons of the IOS-445 output module and
IOS-440 input module are normally not connected together for
loopback interconnection (see
IOS-440/IOS-445 LOOPBACK
CONNECTIONS
).
Grounding and Noise Considerations
Output lines of the IOS-445 are optically isolated between the
logic and field output connections. Likewise, separate port
commons ensure port-to-port isolation. Consequently, the field I/O
connections are isolated from the carrier board and backplane,
thus minimizing the negative effects of ground bounce, impedance
drops, and switching transients. However, care should be taken in
designing installations to avoid inadvertently compromising
isolation, or creating ground loops which can cause noise pickup
and reduce overall system reliability.
3.0 PROGRAMMING INFORMATION
IOS IDENTIFICATION SPACE - (Read Only, 32 Even-Byte
Addresses)
Each IOS module contains identification (ID) information that
resides in the ID space. This area of memory contains 32 bytes of
information at most. Both fixed and variable information may be
present within the ID space. Fixed information includes the "IOS"
identifier, model number, and manufacturer's identification codes.
Variable information includes unique information required for the
module. The IOS-445 ID information does not contain any variable
(e.g. unique calibration) information. ID space bytes are addressed
using only the even addresses in a 64 byte block The IOS-445 ID
space contents are shown in Table 3.1. Note that the base-
address for the IOS module ID space (see the I/O Server manual)
must be added to the addresses shown to properly access the ID
space. Execution of an ID space read requires 0 wait states.
Table 3.1: IOS-445 ID Space Identification (ID) ROM
Hex Offset
From ID
ROM Base
Address
Numeric
Value
(Hex)
Field Description
00
49
02
50
04
41
06
43
08
A3
Acromag ID Code
0A
09
IOS Model Code
1
0C
00
Not Used
(Revision)
0E
00
Reserved
10
00
Not Used
12
00
Not Used
14
0C
Total Number of
ID ROM Bytes
16
8C
CRC
18 to 3E
00
Not Used
Notes (Table 3.1):
1. The IOS model number is represented by a two-digit code
within the ID space (the IOS-445 model is represented by 09
Hex).
2. Execution of an ID space read requires 0 wait states.
