TR-4C Shec Sheet

TR-4C
Tone Receiver

GENERAL DESCRIPTION

Click photo for larger viewThe TR-4C tone receiver is designed to receive tone transmissions from an SSI Model TT-4C tone transmitter. In normal operations, the TR-4C receives four sets of meter energy pulses in a three-wire Form C (K, Y, and Z) or 2-Wire Form A (K and Y) format. While the most common usage of the TR-4C is for energy pulses, it can receive any four Form A or Form C sets of contacts sent by the TT-4C tone transmitter.
The input to the TR-4C tone receiver is via either a twisted wire pair or a leased dedicated telephone line. The operation of the phone line may be either directly dedicated or through a one or more central office exchanges. The TR-4C will directly drive up to 1/2 mile of twisted wire pair without additional amplification. The TR-4C accepts tone input levels of -40 dbm to +3 dbm with the normal input being a -11 dbm level.
The frequencies received by the TR-4C are quartz crystal-controlled and never need adjustment. The TR-4C receiver has 4 “dry” (no voltage present) non-bounce Form C mercury-wetted relay outputs. Several TR-4C receivers may be used with only one TT-4C transmitter which it is desirable to deliver a meter’s pulse information to multiple locations not close to each other. The TR-4C’s tone signal input is through a 600 ohm transformer which meets the FCC Section 68 telephone equipment requirements.
Bright high-output red, and green LEDs indicate the output status of each of the four “energy” pulse 3-wire relays. A yellow LED shows the status of the transmitted signal into the TR-4C at all times making system checking easy without additional test equipment. When two or more events occur at the transmitter at the same time, the TR-4C will replicate the timing without a transmission sequence timing distortion. The input and output terminal strips are color-coded for error-free wiring. Transient suppressors for the mercury-wetted relay output contacts are built in.

TR-4C SPECIFICATIONS

ELECTRICAL

Power Input 120 VAC, 208-277 VAC Burden: 4 VA at 120VAC
Input Signal DTMF tone signal from a TT-4C using a telephone leased line or a twisted wire pair should be between -40 dbm to +3 dbm. The input signal level may be adjusted by means of a variable resistor on the TR-4C.
Output Four sets of dry “Form C” (K, Y, & Z) for energy pulses. The contacts are mercury-wetted “no-bounce” relays rated at 500VDC or 350VAC, 2 amps break, 5 amps carry. The maximum power rating of the contacts is 100VA. Factory fused at 1/2 amp. (3AG)
Contact Resistance 50 milliohms maximum, 12 to 14 ohms typical
Insulation Resistance 50 megohms typical
Operate and Release Time 4 to 8 milliseconds typical

MECHANICAL

Mounting Within 30 degrees of vertical. Mounted on aluminum base plate with mounting tabs
Size 5.50 inches wide, 7.50 inches long, 2.00 inches high
Weight 1.5 pounds

TEMPERATURE

Temperature Range -38° C to +70° C, -36.4° F to +158° F
Humidity 0 to 98% non-condensing

OPTIONS

Input Voltages Contact Factory