Arcom ST-RELAY16 User manual

CONTROL SYSTEMS
J585 ST-RELAY16 2192-10475-000-000
Page 1
ST-RELAY16
Technical Manual
Product Information
Full information about other Arcom products is available by visiting our WebSite at:
www.arcomcontrols.com
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Whilst Arcom’s sales team is always available to assist you in making your decision, the final
choice of boards or systems is solely and wholly the responsibility of the buyer. Arcom’s entire
liability in respect of the boards or systems is as set out in Arcom’s standard terms and
conditions of sale.
If you intend to write your own low level software, you can start with the source code on the disk
which is supplied. This is example code only to illustrate use on Arcom’s products. It has not
been commercially tested. No warranty is made in respect of this code and Arcom shall incur no
liability whatsoever or howsoever arising from any use made of the code.
© 2000 Arcom Control Systems Ltd
Arcom Control Systems is a subsidiary of Fairey Group Plc.
All trademarks recognised.
Arcom Control Systems Ltd
operate a company-wide quality
management system which has
been certified by the British
Standards Institution (BSI) as
compliant with ISO9001:1994

CONTROL SYSTEMS
J585 ST-RELAY16 2192-10475-000-000
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Contents
Introduction..........................................................................................................3
Features ...............................................................................................................3
Operation..............................................................................................................4
I/O Map.....................................................................................................4
Links.....................................................................................................................5
Address Selection.....................................................................................5
Relay Output Selection .............................................................................6
Output Connector (PL2) Pin Assignments.................................................6
Circuit Diagrams..................................................................................................7
Revision History
Manual PCB Comments
Iss A
Iss B V1 Iss1 V1 Iss1 980529 000831 First release of manual [ECO2911]

CONTROL SYSTEMS
J585 ST-RELAY16 2192-10475-000-000
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Introduction
The ST-RELAY16 board contains sixteen single-pole changeover relays. Five of the relays
have both their normally closed and normally open contacts brought out to the output
connector. The remaining 11 relays are fitted with jumpers to allow either the normally open or
normally closed contact to be used. The board provides up to 1000V of electrical isolation
between your STE based control system and the electrical system being controlled. The
isolation between adjacent channels is limited by the wiring and connectors to 100V. The
power switching rating for the relay contacts is 60W (resistive load). The relays and board
layout are designed to switch voltages up to 220V DC (125V AC) and currents up to 2.0A.
Arcom recommend that for safety reasons 48V DC should be the maximum voltage switched
by this board.
Features
• 8 changeover relays with a power switching rating of 60W (resistive load)
• Switching voltage upto 48v DC and switching currents up to 1.0A
• Output status readback register
• Relay drivers disabled on power up and reset
• Both normally closed and/or normally open contacts are available at the output connector
• RC snubber networks on all outputs
• STEbus interface (ANSI/IEEE Std. 1000-1987)
• Board access LED
• Operating temperature range, -20°C - +70°C
• Power consumption @ +5V +/- 5% 480mA max. with all relays energised
• MTBF: 47,000 hours (using generic figures from MIL-HDBK-217F at benign ground)
Handling
All STE boards contain CMOS devices that could be damaged in the event of static electricity
being discharged through them. At all times please observe anti-static precautions when
handling the board and always unpack and install the board in an anti-static working area.
Software
A Utility Disk is supplied with your ST-RELAY16. It contains a host of software utilities
designed specifically for each board. Please refer to the README.TXT file on the disk for
further information.

CONTROL SYSTEMS
J585 ST-RELAY16 2192-10475-000-000
Page 4
Operation
Each relay is switching by writing a logic ‘1’ to the appropriate bit in the relay output registers
located at addresses base and base +1. The status of these registers can also be read at the
same addresses. On power up or reset the relay output drivers are disabled. To enable them it
is necessary to write 01H to the latches at address base +2 to enable group 1 (relay channels
CH1-8), 02H to enable group 2 (CH9-16) or 03H to enable both groups. For system
initialisation, it is recommended that the output registers are written with the required relay
states before the enable bits are set.
I/O Map
Address Function Register Name Bit Function
Base WRelay Output CH1-8 Bit 0-7: 1=ON 0=OFF
Base RRelay Status CH1-8 Bit 0-7: 1=ON 0=OFF
Base+1 WRelay Output CH9-16 Bit 0-7: 1=OFF 0=ON
Base+1 RRelay Status CH9-16 Bit 0-7: 1=OFF 0=ON
Base+2 WRelay Enabled 00H – All relays disabled
01H – CH1-8en, CH9-16 dis
02H – CH1-9 dis, CH9-16 en
03H – All relays enabled
Base+15 RBoard ID ID=01
ReadStatus
Data
WriteControl
Enable Output
+5V
(Cleared on Reset)
D
Q
Relay Channels CH6-16
A
B
NO/NC
COM
Relay Channels CH1-5
NO
NC

CONTROL SYSTEMS
J585 ST-RELAY16 2192-10475-000-000
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Links
Address Selection
The base address of the board is set using LK1; A=MSB, H=LSB. (LK1A – D sets the first digit
and LK1E – H sets the second digit, i.e. 3 and 6 for the default address.) Inserting a jumper
selects logic ‘0’ for the particular address bit.
Default Link Position [Address is 360h]
User Configuration Record
PL2
LED1
LK11
A B
LK12
A
B
B
A
A
B
LK8
LK10
LK5
A
B
B
A
LK7
LK2
A
B
A
BLK4
LK9 LK6 LK3
A B A B A B
LK1
AB C D E
F
G H
PL1
PL2
LED1
LK1
1
A
B
LK12
A B B
A
A
B
LK8
LK10
LK5
A
B
B
A
LK7
LK2
A
B
A
BLK4
LK9 LK6
LK3
A
B
A
B
A
B
LK1
ABCDEF
G
H
PL1

CONTROL SYSTEMS
J585 ST-RELAY16 2192-10475-000-000
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Relay Output Selection
Relay channels CH6-16 can be configured to use either the normally open or normally closed
contact. Placing a link in position A selects the former, in position B, the latter.
Channel 6
Channel 7
Channel 8
Channel 9
Channel 10
Channel 11
Link 9
Link 6
Link 3
Link 12
Link 10
Link 7
Channel 12
Channel 13
Channel 14
Channel 15
Channel 16
Link 4
Link 11
Link 8
Link 5
Link 2
Output Connector (PL2) Pin Assignments
The Output Connector is a 37-way D-Type female connector with the following pin-out:
Pin No. Function Pin No. Function
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Relay 16 NC/NO
Relay 15 NC/NO
Relay 14 NC/NO
Relay 13 NC/NO
Relay 12 NC/NO
Relay 11 NC/NO
Relay 10 NC/NO
Relay 9 NC/NO
Relay 8 NC/NO
Relay 7 NC/NO
Relay 6 NC/NO
Relay 5 NC
Relay 5 common
Relay 4 NC
Relay 3 NC
Relay 3 common
Relay 2 NO
Relay 1 NC
Relay 1 common
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
20
Relay 16 common
Relay 15 common
Relay 14 common
Relay 13 common
Relay 12 common
Relay 11 common
Relay 10 common
Relay 9 common
Relay 8 common
Relay 7 common
Relay 6 common
Relay 5 NO
Relay 4 NO
Relay 4 common
Relay 3 NO
Relay 2 NC
Relay 2 common
Relay 1 NO

CONTROL SYSTEMS
J585 ST-RELAY16 2192-10475-000-000
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Circuit Diagrams

CONTROL SYSTEMS
J585 ST-RELAY16 2192-10475-000-000
Page 8

CONTROL SYSTEMS
J585 ST-RELAY16 2192-10475-000-000
Page 9