Monroe Electronics R174A - Manual (Page 5)

5
SPECIFICATIONS
RF Isolation
> 60 dB @ 950 MHz.
Attenuation
+/- 1 dB 0 to 750 MHz
See Attached Frequency Charts on page 9.
Power
90 – 260 AVC, 47-63Hz: 12VDC output - supplied
Control Inputs
Contact Closure
Absolute Maximum Input Voltage 5 VDC
Logical High Input Voltage 3.5 VDC Minimum
Logical Low Input Voltage 1.5 VDC Maximum
Serial Input
Each unit (up to 15 maximum) is individually addressable
RS-485, 2 wires plus ground
SwitchWare2

software, Windows

based
DTMF Tone Input
Unbalanced, 10k impedance input
1 for each switch assembly
Control Output
Single open collector to ground, 30 Volt 30 mA
1 for each switch assembly
Physical
3.5” H X 3” D X 19” W, 1 Rack Mount
WARNING:
The audio input jacks – RJ11 4/4 – on the rear of the unit are intended
for audio input only. Do not connect a telephone line to them. It will
damage the unit and void the warranty.