Electrical Specifications; Input Power Requirement; Electrical Classification; Relay Contact Rating - General Monitors 4802A Instruction Manual

6.5

Electrical Specifications

6.5.1 Input Power Requirement

20 to 35Vdc, (24Vdc @ 250mA, 4.8W nominal) (300 mA max).
PSU noise and ripple voltage 1.0Vpp max. The customer supplied PSU must comply
with IEC 1010-1, limiting current to 8A under Fault conditions, in order to comply with
CE Marking requirements.

6.5.2 Electrical Classification

The Sensor is rated for used in Class I, Division 1, Groups B, C & D or European Zones
1 & 2. The Model 4802A is designed for use in non-hazardous environments.

6.5.3 Relay Contact Rating

4A @ 30V RMS/42.4V PK, 3A @ 30VDC resistive. DPDT for A1 & A2, SPDT for Fault.

6.5.4 Open Collector Rating

100mA @ 35Vdc for A1, A2, Fault, UA, FUA, CAL-OC, LA1 & LA2.

6.5.5 Cable Parameters

Recommended 3-wire screened or screened and armoured per BS5308 or equivalent.
Maximum cable lengths allowable between module and sensor with one way resistance
of 5 Ohms per sensor lead (10 Ohms loop)
Figure 72 – Recommended Maximum Cable Lengths
The maximum allowable cable lengths between the analog output connections on the
control module with a remote device in series (maximum loop resistance of 500 Ohms
between AO+ & AO-):
Figure 73 – Maximum Allowable Cable Lengths
Between Analog Output Connections On Control Module
2
mm AWG Feet
2.5 14 7600
1.5 16 4800
1.0 18 3000
.75 20 1900
Between Module & Sensor
2
mm AWG Feet
2.5 14 9000
1.5 16 5200
1.0 18 3800
.75 20 2400
47
Model 4802A
Meters
2320
1460
910
580
Meters
2740
1585
1160
730