Enmet CP-60 Uživatelský manuál stáhnout pdf (Strana 10)

CP-60 ENMET Corporation

3.4.2 Relay Contacts

Auxiliary alarms should be powered from an independent power source separate form the instrument power to avoid alarm

failure due to controller malfunction.

Relay are SPDT, rated at 10Amp at 110V

or 10Amp at 30V

for restive loads, and may be latching or non-latching as

required by the application. They are accessed on the terminals next to each relay see Figures 2 & 5. The contact positions are

noted on the circuit board next to each terminal.

These relay coils are energized when they are in the non-alarm state; the contact conditions given above are for the non-

energized state, which is identical to the alarm state.

In addition, there is a fault relay, which changes state whenever the instrument is in a fault condition. The contact positions are

noted on the circuit board next to each terminal. The coil of this relay is energized when the instrument is in the non-fault state;

the contact conditions given on the circuit board next to the terminal, are for the non-energized state, which is identical to the

fault state.

The PC Board is labeled for the relays in their un-energized state. If the relay is configured for failsafe, then this is also the alarm

condition state. Non-failsafe configured relays in the alarm state, are the reverse of the PC board labeling. Note that the

Fault(FLT) relay cannot be set to operate in a Non-Failsafe mode. Please see the Table 1 below:

Table 1 : Relay Factory Default Failsafe Settings

Factory Default Settings

Posit

ion

Failsafe

Alarm

Non

Failsafe

Alarm

Gas Alarm 1 J5 Relay 1 - NO Normally Open Normally Closed

Channel 1 J5 Relay 1 - COM Common Common

J5 Relay 1 - NC Normally Closed Normally Open

Gas Alarm 1 J6 Relay 2 - NO Normally Open Normally Closed

Channel 2 J6 Relay 2 - COM Common Common

J6 Relay 2 - NC Normally Closed Normally Open

Gas Alarm 1 J8 Relay 3 - NO Normally Open Normally Closed

Channel 3 J8 Relay 3 - COM Common Common

J8 Relay 3 - NC Normally Closed Normally Open

Gas Alarm 1 J10 Relay 4 - NO Normally Open Normally Closed

Spare J10 Relay 4 - COM Common Common

Not Programmed J10 Relay 4 - NC Normally Closed Normally Open

Gas Alarm 2 System J14 Relay 5 - NO Normally Open Normally Closed

Channel 1 – 3 J14 Relay 5 - COM Common Common

J14 Relay 5 - NC Normally Closed Normally Open

J15 Relay 6/FLT - NO Normally Open N/A

Fault J15 Relay 6/FLT - COM Common N/A

J15 Relay 6/FLT - NC Normally Closed N/A

These relay contacts can be used to operate auxiliary alarms or other functions.

3.4.3 4-20mA Outputs

Isolated 4-20 mA outputs are available for data logging or other purposes. An output is supplied for each active channel. These

outputs are available on the Connector 1(J7) for channels 1 & 2 and Connector 2(J4) for channels 3.

4mA corresponds to the sensor reading of 0 at the bottom of the range.

20mA corresponds to a full scale reading.

Wiring requirements are the same as for the relays.

3.4.4 Digital Outputs

The RS232 & RS485 connections are used for firmware updates and digital communications. The CP-60 is designed to

operate as a modbus slave. Contact the ENMET for further information on wiring for the digital outputs.

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 22 23

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