SIGNAL GROUP LTD
s/sales/masters/manuals/noxgman.doc Page 12 of 17
3.07
REMOTE CONTROL CONNECTIONS
The remote control option is to enable you to control the gas selection functions
using TTL inputs. The TTL levels can be either OV inputs via the earth return
pins or, for people without a transistor logic controller or computer, a simple short
circuit wire link with a switch for ON and OFF can be connected between any of
the four earth pins and the function pin.
Before any of the function pins can be utilised, the remote enable must be
operated and again, either an OV logic signals via the earth return or a short
circuit wire link can be used.
Without the remote enable function being operated, the instrument operates in
the same way as the non remote control instrument.
With no power connected, the instrument with the remote control option will shut
off all gas flows using the built-in solenoid valves.
PIN NO.
FUNCTION
(15 WAY D CONNECTOR)
1
N/C
2
OV RETURN
3
OV RETURN
4
OV RETURN
5
OV RETURN
6
OV RETURN
7
OV RETURN
8
N/C
9
N/C
10
REMOTE ENABLE
11
OXYGEN ON
12
SPAN ON
13
OZONE ON
14
N/C
15
N/C
NOTE:
DO NOT MAKE ANY CONNECTIONS TO N/C PINS
