Hytec Electronics 8901-CC User manual

HYTEC ELECTRONICS Ltd
5 CRADOCK ROAD, READING, BERKS. RG2 0JT, UK
Telephone: [phone] Fax: [phone]
E-mail: [e-mail]
8901-CC
16-Channel I/O with Current Source
DIN-Rail Mounted Terminal Board
USERS MANUAL
Document Nos.: 8901-CC/UTM/G/x/1.1
Date: 21/07/2008
Author: AB

Hytec Electronics Ltd 8901-CC/UTM/G/x/1.1
Page 2
CONTENTS
1. INTRODUCTION...............................................................................................................................3
2. PRODUCT SPECIFICATIONS........................................................................................................3
3. BOARD DESCRIPTION....................................................................................................................3
4. OPERATION.......................................................................................................................................3
5. 8901-TD CONNECTION DIN-RAIL BOARD PIN-OUT...............................................................4

Hytec Electronics Ltd 8901-CC/UTM/G/x/1.1
Page 3
1.INTRODUCTION
The Hytec 8901-CC is a DIN-Rail mounted board which allows voltage free contacts to be sensed by
connection to a VME64X carrier board. It connects to the transition board using a 50-way SCSI cable.
•50-way terminal connection to plant equipment.
•50-way SCSI socket connects to transition board
•Supplies twenty (16 signal + 4 control) current sources (5mA) to plant contacts and
connects the contact output to digital inputs
•LED indication of current flow.
•Jumpers enable LEDs to be shorted out
•Indication of +24V presence
•Transient voltage protection
2.PRODUCT SPECIFICATIONS
Size: DIN-rail mounted module approx 150x75x45mm
Operating temp: 0 to 45 deg C ambient
Power Requirements: Optional +24V indication of transition board isolated power
Number of channels: 16 signal plus 4 control
Number of signals: I/O 1-16, TRG, CLK, STR, STB, +24V, AGnd, plus 4 spare pairs
Connectors: SCSI 50-way socket for connection to transition board
50-way terminal screws
Transient protection: 26V clamp rising to 40V max @ 10A using varistors
3.BOARD DESCRIPTION
The board is primarily intended to allow plant switch contacts to be sensed using a constant
current. The currents are routed to a VME64X transition card using a 50-way twisted pair SCSI
cable.
The signal pair (source current and signal return) for I/O1 connect between T26 and T1. The
pair for I/O2 connect between T27 and T2 and so on up to T47 and T22. The signals are
connected to the relevant pin numbers on the SCSI connector.
Jumpers J1-J20 can be used to short circuit the respective LEDs when input currents are not
monitored i.e. the LED monitoring is disabled and the circuit is connected straight-through.
The LED which indicates the presence of +24V is over-voltage protected by a varistor.
Links LK1 and LK2 disconnect pins 25 and 50 of the SCSI so that an external PSU can be
connected.
Important Note LK1 and LK2 should not be made as this connects the sup[ply voltages
incorretly. Please contact Hytec for a solution.
4.OPERATION
4.1 Connection to Transition Board
Connect the unit to the SCSI socket on the transition board for the relevant carrier board site
(e.g. lowest of the four connectors for an IP card plugged into site A)
4.2 Select power for current sources
For an external 24V supply open links 1 and 2.and close link 3.
4.3 Connection to Plant Equipment
Connect the signals to the terminals as shown in the table in section 5.
Connect the external supply +24V to terminal 50 and 0V to terminal 25.

Hytec Electronics Ltd 8901-CC/UTM/G/x/1.1
Page 4
5.8901-CC Connection DIN-Rail Board Pin-out
SCSI 50-way
Terminal
LED
Signal
Comment
26
1
I/O1 Source
+ve to contact
26
1
I/O1 Signal
Digital input
27
2
I/O2 Source
+ve to contact
27
2
I/O2 Signal
Digital input
28
3
I/O3 Source
+ve to contact
28
3
I/O3 Signal
Digital input
29
4
I/O4 Source
+ve to contact
29
4
I/O4 Signal
Digital input
30
5
I/O5 Source
+ve to contact
30
5
I/O5 Signal
Digital input
31
6
I/O6 Source
+ve to contact
31
6
I/O6 Signal
Digital input
32
7
I/O7 Source
+ve to contact
32
7
I/O7 Signal
Digital input
33
8
I/O8 Source
+ve to contact
33
8
I/O8 Signal
Digital input
34
9
I/O9 Source
+ve to contact
34
9
I/O9 Signal
Digital input
35
10
I/O10 Source
+ve to contact
35
10
I/O10 Signal
Digital input
36
11
I/O11 Source
+ve to contact
36
11
I/O11 Signal
Digital input
37
12
I/O12 Source
+ve to contact
37
12
I/O12 Signal
Digital input
38
13
I/O13 Source
+ve to contact
38
13
I/O13 Signal
Digital input
39
14
I/O14 Source
+ve to contact
39
14
I/O14 Signal
Digital input
40
15
I/O15 Source
+ve to contact
40
15
I/O15 Signal
Digital input
41
16
I/O16 Source
+ve to contact
41
16
I/O16 Signal
Digital input
42
42
17
43
17
XTRIG Source
+ve to contact
43
18
XTRIG Signal
Digital input
44
18
STR Source
+ve to contact
44
19
STR Signal
Digital input
45
19
XCLK Source
+ve to contact
45
20
XCLK Signal
Digital input
46
46
21
47
20
STB Source
+ve to contact
47
22
STB Signal
Digital input
48
48
23
23
49
49
24
24
50
50
21
+24V
LK1 out for Ext
25
25
0V common to SCSI
pins 1-22
LK2 out for Ext