HA243821
Issue 5 Mar 98
Section5
Page 5 - 59
MODEL 346 INSTALLATION AND OPERATION MANUAL
5.8 RETRANSMISSION OPTION
5.8.1 INTRODUCTION
This option provides up to three isolated outputs, each capable of driving loads of up to 600
Ω
. These outputs are
linearised and scaled versions of any input channel, derived channel or derived variable, and can be configured
as either 0 to 20 mA or 4 to 20 mA, as a part of the software (menu) configuration described below.
At the rear terminals of the recorder, located as shown below, the signal can be taken directly as a current output,
or if a voltage output is required, the signal is taken from an integral 250 resistor. If the output set up in the menu
is defined as 0 to 20 mA, then the equivalent voltage range appearing across the resistor will be 0 to 5 Volts; if the
output is defined as 4 to 20 mA, then the equivalent voltage range will be 1 to 5 Volts
Figure 5.8.1 Re-transmission terminal locations
CAUTION
DAMAGE WILL BE CAUSED TO THE TERMINAL BLOCKS IF THE SCREWS ARE OVER-TIGHTENED. THE
RECOMMENDED MAXIMUM TORQUE IS O.4Nm.
L
N
Ch 1 -
+
RFI
Grounding
Ch 3 -
+
Ch 1 -
+ Ch 1 -
+ Ch 1 -
+
Ch 2 -
+
The retransmission terminations are shown here in option board 2 position (Slot 4). The board
can alternatively be fitted in option board position 1 (slot 3) See section 2.4.5 for further details.
I
V
C
I
V
C
I
V
C
Output 2
Output 3
Output 1
