CARBONEX ECHO-PG, Technical And Operating Manual, Page: 8 / 34

E C H O - P G V E R S I O N E N 1
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6. Description
Drawing no. 28PG.V1 shows overall structure a communication system in variant 1
with manipulator EPG. Drawing no. 28PG.V2 shows overall structure a communication
system in variant 2 with additional signaling devices. System consists of two sets of
components: the headframe unit which is shown in drawing no. 28PG.02 and the cage unit
drawing no. 28PG.01. There are installed two inductive couplers in headframe in such way
that the rope passes through the center of couplers. One of them is transmitter and the second
one is receiver. The second pair of couplers is fitted over conveyance. Transmitting coupler
sends current signal, which flows through rope to the receiving coupler. The main condition
of proper work of system is existence of a closed loop for current flow (does not apply to
frequency version D). This loop is formed by headrope and platform. In case of existing
guiderope loop may be done by making connection between two such ropes or by connecting
to ground ends of guiderope. For frequency version D such loop is formed by headrope and
the capacitance headrope-shaft. Blok diagram of cage device is shown in drawing no.
28PG.01.02. Blok diagram of headframe device is shown in drawing no. 28PG.02.02.
Transmitters of both devices emit continuously carrier frequencies. There are two carrier
frequencies at each system, which depend on version of devices.
When both carrier
frequencies are present the device is switched to ready mode. Contacts NO or NC of the
circuits which will be connected to the headframe device inputs should be connected between
proper input and common terminal. Communication from a platform is realized by a cage
device. Communication from a bottom is performed by a manipulator EPG drawing no.
28PG.01.V1. In the case where using a manipulator is burdensome instead of it can be use the
additional signaling devices, what is shown in drawing no. 28PG.01.V2. If the socket is
unconnected there will be emitted a continuous alarm.
6.1. Audio communication
is realized in a semiduplex way. Cage device is continuously in
the receive mode when the unit is in ready mode and not transmitting. Voice communication
is done only from cage device after pressing and hold blue button PTT, platform has priority.
In headframe unit broadcast is done after pressing microphone foot switch.
6.2. Signal code is used to transmit the Code of Signals. After pressing yellow button CODE in
cage device, output relay P7 is turned on in headframe device if input no. 2 (ACS) and input no. 7
(AP) in headframe device will be closed. After pressing yellow button CODE in manipulator or
after using additional signaling device, output relay P8 is turned on in headframe device if input no.
2 (ACS) and input no. 8 (AB) in headframe device will be closed. In cage device we should hear
bell if feedback microphone would be fastened near to signal bell as well as we should see green
led CCS if input no.1 (CCS) in headframe device will be connected to output of relays P7 and P8.
6.3. Signal alarm is send from cage device after pressing red button ALARM in cage device or
red button ALARM in manipulator. It is possible to hear alarm bell in cage device, for this purpose
should be closed input no. 3 (CA) in headframe device. This input activates feedback microphone
so it should be fastened near to alarm bell.