Siemens SIREC DS 7ND4120 Series, User Manual

Page: 27 / 116

43-TV-25-20 GLO Issue 4 01/02 UK 19
A5E00117351-04
Current Inputs
For current inputs an external resistor is required to be fitted across pins 1 and 2, 1 per
channel. The resistor value should be 10
Ω
and a high tolerance such as 0.1%.
The resistor should been connected as shown, on the mating half connector, across
the relevant pins according to which channels are to be set up for current input.
See “Analogue In Setup” on page 41.
Thermocouple
The
Thermocouple
is connected for internal compensation - details on how to connect
thermocouples using other forms of compensation are given in “Appendix C -Thermo-
couple Connections” on page 89.
Details on setting up thermocouple and resistance thermometer inputs See “Thermo-
couple” on page 47. Or see “Calibrate Input” on page 38.
Alarm Card (option)
For set up of Alarms, See “Relay Alarm Cards” on page 63.
There are two
Relay/Alarm Card
options available on the
SIREC DS
. There is a 4 x
relay output card and a 6 x relay output with 2 volt free digital inputs. The relay outputs
will be activated by
•
Alarm or set points
• Disk full
The volt free contact inputs will be available to
• Activate alarms and set points
•
Recording control
• Change log rates. (Pause logging)
Current input
channel number
Pin numbers to
connect
1 1&2
2 4&5
3 7&8
4 10&11
5 13&14
6 16&17
1
2
This resistor connection is
an example for a current
input on channel 1