General Monitors S4000CH, Руководство пользователя

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Model S4000CH
19
TB3 position Relay Contact (Energized)
7 Normally Open
8 Common
9 Normally Closed
Table 7: Fault Relay Connections
NOTE:
Fault relay is normally energized. Relay will change state after power up.
WARNING:
Contact with PCB components should be avoided to prevent damage by
static electricity. All wire connections are made to the Terminal Blocks. Relay
contacts must be protected against transient and over voltage conditions
(Figure 17).
Figure 17: Relay Protection for DC and AC Loads
European Union (EU) Approved Applications:
The ALARM relay contact ratings are 8 A,
30 V RMS/42.4 V peak or 8 A @ 30 VDC resistive max.
North American Approved Applications:
The ALARM relay contact ratings are 8 A @ 250
VAC and 8 A @ 30 VDC resistive max.
3.5.7 European Union (EU) Approved Applications
Interconnecting cables must have an overall screen or screen and armor. Cables BS5308
Part 2, Type 2; or equivalent, are suitable. Note that the terms ‘screen’ and ‘shield’ are
equivalent for the purpose of this manual. The cable armor must be terminated in a
suitable cable gland, at the detector, to ensure a positive electrical connection.
3.5.8 Cable Termination in the Non-Hazardous Area

The cable
armor
must be connected to
safety earth
in the safe area.

The cable
screen
(drain wire) must be connected to an
instrument earth
in the safe
area.

The power supply
0V return
must be connected to an
instrument earth
in the safe
area.

The interconnecting cables should be segregated from power and other noisy cables.
Avoid proximity to cables associated with radio transmitters, welders, switch mode