100/180 mm PAPERLESS GRAPHIC RECORDER: USER GUIDE
HA028910
Issue 13 Sep 16
User Guide
Page 336
11 TRANSMITTER POWER SUPPLY
11.1 INTRODUCTION
WARNING!
Transmitter power supplies must not be used with dc supply voltages.
Notes:
1. Transmitter power supplies are not suitable for use with dc or low-voltage ac supplies.
2 The transmitter power supply is available only with 100 mm. recorders.
This option consists of a circuit board, terminal block and suitable wiring inside a long terminal cover at
the rear of a 100mm recorder. The board supplies three mutually isolated dc supplies (nominal 25 Volts)
each of which is intended to power a single 0 to 20 mA or 4 to 20 mA current loop.
11.2 FUSING
11.2.1 Fuse Rating
The circuit board is protected by a 20 mm anti-surge (type T) fuse, the value of which depends on the
supply voltage as shown in table 11.2.1, below.
Access to the output wiring and to the fuse is achieved by isolating the recorder from mains power and
opening the terminal cover (after removing its securing screws). The process is fully described below.
Table 11.2.1 Transmitter power supply fuse details
11.2.2 Access to the user connections/fuse
1 Isolate the recorder from the supply voltage.
2 At the rear of the recorder remove the terminal cover securing screws (fi gure 11.2.2a), taking care to
retain them for use in re-assembly.
Supply voltage Fuse rating Part Number
115V ac
100 mA
CH050012
230V ac
63mA
CH050630
Figure 11.2.2a Retaining screw locations
Cover securing screws
