Sentry 5000-32-IT Controller
Page 13 of 82
2.3.3 PSG
The PSG Interface Board (
) provides two loops of inputs for Sentry proprietary PSG multi-drop
communications protocol. Each of the loops identified as Loop A and Loop B supports up to eight gas
detection modules. The board plugs into a Carrier Board to complete a PSG Input Stack.
The primary use of the PSG board is to support existing infrastructure where three conductor wiring is
installed. The three conductors may have previously supported analog 4-20 mA modules or early version
SMC gas detection modules.
Sensor modules connected using the three wire PSG connection are multi-drop and can be connected on
common wiring using up to eight addresses on each of the two loops. The board polls sensor modules
using PSG protocol and converts data into the common serial protocol for communicating with the SBC.
The board includes:
(1) Sentry Loop A eight field connectors to support PSG addresses A1 through A8
(2) Sentry Loop B eight field connectors to support PSG addresses B1 through B8
(3) Factory installed wire and ribbon cable connections for power and inter-stack and SBC
communication
(4) Run LEDs
PSG Stacks can be installed in any stack position in the controller and must configured for the
corresponding stack position number on both the Carrier Card rotary switch and the PSG Card rotary
switch. A maximum of two PSG Stacks are allowed per 32 channel controller. The PSG Board also
provides a programmable SPDT Relay intended for use as a local Trouble Relay.
Figure 6: PSG Sentry Bus Interface Board
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Содержание Sentry 5000-32-IT
Страница 28: ...Sentry 5000 32 IT Controller Page 28 of 82 Figure 15 Analog Input Wiring ...
Страница 29: ...Sentry 5000 32 IT Controller Page 29 of 82 Figure 16 PSG Sentry Classic Wiring ...
Страница 30: ...Sentry 5000 32 IT Controller Page 30 of 82 Figure 17 Modbus Wiring ...
Страница 31: ...Sentry 5000 32 IT Controller Page 31 of 82 Figure 18 Top Board Relay Digital Output Wiring ...
Страница 32: ...Sentry 5000 32 IT Controller Page 32 of 82 Figure 19 Analog Output Wiring ...
Страница 33: ...Sentry 5000 32 IT Controller Page 33 of 82 Figure 20 Digital Input Wiring ...
Страница 34: ...Sentry 5000 32 IT Controller Page 34 of 82 Figure 21 Bottom Board Relay Wiring ...
