Output Module - Dräger Regard 3900 Instructions For Use Manual

Technical information
4.4.1 Relay module relay settings
RL1 is used to indicate that a system-fault has occurred. For example: RL1 will de-energize if the ribbon cable is disconnected
from the relay module, or if an F1 fault signal is received from any remote sensor transmitter in the system. RL1 is preset to:
● Function: common F1
● Normally energized
● Latching
● Non-acknowledgeable
The other seven relays can be set during configuration to:
● Function: see table below
● Normally energized or energize on alarm
● Latching or non-latching
● Acknowledgeable or non-acknowledgeable
Function
Common A1
Common A2
Common A3
Common F1
Common F2
Common A1, A2 or A3
Single A1
Single A2
Single A3
Single F1
Single F2
Voting A1
Voting A2
Voting A3
Voting F1
Voting F2
Alarms inhibited
No function
4.5

Output module

An output module is used to send the current signals that are
received from the remote sensor transmitters to an external
monitoring device or system. The module has eight output
channels (Ch 1–8) that match the signals from the controller
input channels (either Ch 1–8 or Ch 9–16) (see Section 5.6.2
on Page 17).
+ Signal
- 0 V
The signal outputs and 0 V duplicate the input channel signals but are electrically isolated from the input channels. The signal
outputs are current source that will only work when connected to a passive load.
Input channel signal (mA) Display screen reading (0–100 range) Output channel signal (mA)
Below 3.8
3.8 to 4.2
4.3
12
20
Above 20
Input channel inactive
Note 1: The zero clamp provides a 4 mA output signal for very low gas levels of ± 2% of the measuring range.
Alarms inhibit
If the inhibit switch is set to position 1 the output signals freeze at their current level. When the inhibit switch is returned position 0
the output signals return to the normal level.
Output module fault
If the output module has a fault, the output signal on all channels is 1 mA (± 0.3 mA).
12
Relay changes state when
A1 trips on any channel
A2 trips on any channel
A3 trips on any channel
F1 trips on any channel
F2 trips on any channel
A1 or A2 or A3 trips on any channel
A1 trips on one specified channel
A2 trips on one specified channel
A3 trips on one specified channel
F1 trips on one specified channel
F2 trips on one specified channel
A1 trips on a specified number of channels in a group
A2 trips on a specified number of channels in a group
A3 trips on a specified number of channels in a group
F1 trips on a specified number of channels in a group
F2 trips on a specified number of channels in a group
The inhibit switch on the display board is moved to position 1
Relay does not change state
Under-range or maintenance
0
2
50
100
Over-range
Not applicable
Matches input signal
4.0 (zero clamp 1 )
4.3
12
20
Matches input signal
0
3805
Regard 3900 Series